锘??xml version="1.0" encoding="utf-8" standalone="yes"?>一区二区精品在线,国产一区二区按摩在线观看,蜜臀av在线播放一区二区三区http://www.shnenglu.com/cxiaojia/archive/2013/08/06/202374.htmlC灝忓姞C灝忓姞Tue, 06 Aug 2013 11:36:00 GMThttp://www.shnenglu.com/cxiaojia/archive/2013/08/06/202374.htmlhttp://www.shnenglu.com/cxiaojia/comments/202374.htmlhttp://www.shnenglu.com/cxiaojia/archive/2013/08/06/202374.html#Feedback0http://www.shnenglu.com/cxiaojia/comments/commentRss/202374.htmlhttp://www.shnenglu.com/cxiaojia/services/trackbacks/202374.html
float multi = 1.0f;
CCDirector::sharedDirector()->getScheduler()錛?gt;setTimeScale(multi);
鍙傛暟multi鏄嶇巼鐨勬剰鎬濓紝榛樿鏄?,鍊嶇巼瓚婇珮閫熷害瓚婂揩銆?br />
濡傛灉闇瑕佹彁鍗囦竴鍊嶇殑閫熷害錛屽彲浠ユ妸multi璁句負2.0f銆?br />
閫氳繃榪欐牱涓涓満鍒跺彲浠ュ疄鐜版父鎴忓唴鎴樻枟鍊嶆暟鍔犻熺殑鍔熻兘銆?img src ="http://www.shnenglu.com/cxiaojia/aggbug/202374.html" width = "1" height = "1" />

C灝忓姞 2013-08-06 19:36 鍙戣〃璇勮
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#pragma once 涓?#ifndef 瑙f瀽(杞?http://www.shnenglu.com/cxiaojia/archive/2013/03/18/198526.htmlC灝忓姞C灝忓姞Mon, 18 Mar 2013 02:28:00 GMThttp://www.shnenglu.com/cxiaojia/archive/2013/03/18/198526.htmlhttp://www.shnenglu.com/cxiaojia/comments/198526.htmlhttp://www.shnenglu.com/cxiaojia/archive/2013/03/18/198526.html#Feedback2http://www.shnenglu.com/cxiaojia/comments/commentRss/198526.htmlhttp://www.shnenglu.com/cxiaojia/services/trackbacks/198526.html杞嚜錛?/span>http://blog.csdn.net/slimfox/article/details/1565950
 

涓轟簡閬垮厤鍚屼竴涓枃浠惰include澶氭錛孋/C++涓湁涓ょ鏂瑰紡錛屼竴縐嶆槸#ifndef鏂瑰紡錛屼竴縐嶆槸#pragma once鏂瑰紡銆傚湪鑳藉鏀寔榪欎袱縐嶆柟寮忕殑緙栬瘧鍣ㄤ笂錛屼簩鑰呭茍娌℃湁澶ぇ鐨勫尯鍒紝浣嗘槸涓よ呬粛鐒惰繕鏄湁涓浜涚粏寰殑鍖哄埆銆?/span>
    鏂瑰紡涓錛?/span>
    #ifndef __SOMEFILE_H__
    #define __SOMEFILE_H__
    ... ... // 涓浜涘0鏄庤鍙?br style="margin: 0px; padding: 0px;" />    #endif

    鏂瑰紡浜岋細
    #pragma once
    ... ... // 涓浜涘0鏄庤鍙?/span>

    #ifndef鐨勬柟寮忎緷璧栦簬瀹忓悕瀛椾笉鑳藉啿紿侊紝榪欎笉鍏夊彲浠ヤ繚璇佸悓涓涓枃浠朵笉浼氳鍖呭惈澶氭錛屼篃鑳戒繚璇佸唴瀹瑰畬鍏ㄧ浉鍚岀殑涓や釜鏂囦歡涓嶄細琚笉灝忓績鍚屾椂鍖呭惈銆傚綋鐒訛紝緙虹偣灝辨槸濡傛灉涓嶅悓澶存枃浠剁殑瀹忓悕涓嶅皬蹇?#8220;鎾炶濺”錛屽彲鑳藉氨浼氬鑷村ご鏂囦歡鏄庢槑瀛樺湪錛岀紪璇戝櫒鍗寸‖璇存壘涓嶅埌澹版槑鐨勭姸鍐?#8212;—榪欑鎯呭喌鏈夋椂闈炲父璁╀漢鎶撶媯銆?/span>
    #pragma once鍒欑敱緙栬瘧鍣ㄦ彁渚涗繚璇侊細鍚屼竴涓枃浠朵笉浼氳鍖呭惈澶氭銆傛敞鎰忚繖閲屾墍璇寸殑“鍚屼竴涓枃浠?#8221;鏄寚鐗╃悊涓婄殑涓涓枃浠訛紝鑰屼笉鏄寚鍐呭鐩稿悓鐨勪袱涓枃浠躲傚甫鏉ョ殑濂藉鏄紝浣犱笉蹇呭啀璐瑰姴鎯充釜瀹忓悕浜嗭紝褰撶劧涔熷氨涓嶄細鍑虹幇瀹忓悕紕版挒寮曞彂鐨勫鎬棶棰樸傚搴旂殑緙虹偣灝辨槸濡傛灉鏌愪釜澶存枃浠舵湁澶氫喚鎷瘋礉錛屾湰鏂規硶涓嶈兘淇濊瘉浠栦滑涓嶈閲嶅鍖呭惈銆傚綋鐒訛紝鐩告瘮瀹忓悕紕版挒寮曞彂鐨?#8220;鎵句笉鍒板0鏄?#8221;鐨勯棶棰橈紝閲嶅鍖呭惈鏇村鏄撹鍙戠幇騫朵慨姝c?/span>
    #pragma once鏂瑰紡浜х敓浜?ifndef涔嬪悗錛屽洜姝ゅ緢澶氫漢鍙兘鐢氳嚦娌℃湁鍚榪囥傜洰鍓嶇湅鏉?ifndef鏇村彈鍒版帹宕囥傚洜涓?ifndef鍙楄璦澶╃敓鐨勬敮鎸侊紝涓嶅彈緙栬瘧鍣ㄧ殑浠諱綍闄愬埗錛涜?pragma once鏂瑰紡鍗翠笉鍙椾竴浜涜緝鑰佺増鏈殑緙栬瘧鍣ㄦ敮鎸侊紝鎹㈣█涔嬶紝瀹冪殑鍏煎鎬т笉澶熷ソ銆備篃璁革紝鍐嶈繃鍑犲勾絳夋棫鐨勭紪璇戝櫒姝葷粷浜嗭紝榪欏氨涓嶆槸浠涔堥棶棰樹簡銆?/span>
    鎴戣繕鐪嬪埌涓縐嶇敤娉曟槸鎶婁袱鑰呮斁鍦ㄤ竴璧風殑錛?/span>
    #pragma once
    #ifndef __SOMEFILE_H__
    #define __SOMEFILE_H__
    ... ... // 涓浜涘0鏄庤鍙?br style="margin: 0px; padding: 0px;" />    #endif

    鐪嬭搗鏉ヤ技涔庢槸鎯沖吋鏈変袱鑰呯殑浼樼偣銆備笉榪囧彧瑕佷嬌鐢ㄤ簡#ifndef灝變細鏈夊畯鍚嶅啿紿佺殑鍗遍櫓錛屾墍浠ユ販鐢ㄤ袱縐嶆柟娉曚技涔庝笉鑳藉甫鏉ユ洿澶氱殑濂藉錛屽掓槸浼氳涓浜涗笉鐔熸倝鐨勪漢鎰熷埌鍥版儜銆?/span>
    閫夋嫨鍝鏂瑰紡錛屽簲璇ュ湪浜嗚В涓ょ鏂瑰紡鐨勬儏鍐典笅錛岃鍏蜂綋鎯呭喌鑰屽畾銆備簨瀹炰笂錛屽彧瑕佹湁涓涓悎鐞嗙殑綰﹀畾鏉ラ伩寮緙虹偣錛屾垜璁や負鍝鏂瑰紡閮芥槸鍙互鎺ュ彈鐨勩傝岃繖涓凡緇忎笉鏄爣鍑嗘垨鑰呯紪璇戝櫒鐨勮矗浠諱簡錛屽簲褰撶敱紼嬪簭鍛樻潵鎼炲畾銆?/span>
    btw錛氭垜鐪嬪埌GNU鐨勪竴浜涜璁轟技涔庢槸鎵撶畻鍦℅CC 3.4錛堝強鍏朵互鍚庯紵錛夌殑鐗堟湰鍙栨秷瀵?pragma once鐨勬敮鎸併備笉榪囨垜鎵嬩笂GCC 3.4.2鍜孏CC 4.1.1浠嶇劧鏀寔#pragma once錛岀敋鑷蟲病鏈塪eprecation warning銆俈C6鍙婂叾浠ュ悗鐗堟湰浜︽彁渚涘#pragma once鏂瑰紡鐨勬敮鎸併傜湅鏉ヨ繖涓鐗規у凡緇忕ǔ瀹氫笅鏉ヤ簡銆?nbsp;

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C++浠繪剰綾誨瀷杞崲妯℃澘http://www.shnenglu.com/cxiaojia/archive/2012/04/12/171091.htmlC灝忓姞C灝忓姞Thu, 12 Apr 2012 07:13:00 GMThttp://www.shnenglu.com/cxiaojia/archive/2012/04/12/171091.htmlhttp://www.shnenglu.com/cxiaojia/comments/171091.htmlhttp://www.shnenglu.com/cxiaojia/archive/2012/04/12/171091.html#Feedback5http://www.shnenglu.com/cxiaojia/comments/commentRss/171091.htmlhttp://www.shnenglu.com/cxiaojia/services/trackbacks/171091.html#include<iostream>
#include<sstream>
#include<string>
using namespace std;


template<class out_type,class in_value>
out_type convert(const in_value & t)
{
stringstream stream;
stream<<t;//鍚戞祦涓紶鍊?/span>
out_type result;//榪欓噷瀛樺偍杞崲緇撴灉
stream>>result;//鍚憆esult涓啓鍏ュ?/span>
return result;
}


int main()
{
    string s;
    while(cin>>s)
    {
        double valdou=convert<double>(s); 
        int valint=convert<int>(s); 
        cout<<valdou<<endl;
        cout<<valint<<endl;
       
      
    }


    return 0;
}

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鑷繁瀹炵幇鐨刴emcpy()浠g爜http://www.shnenglu.com/cxiaojia/archive/2012/03/13/167815.htmlC灝忓姞C灝忓姞Tue, 13 Mar 2012 13:04:00 GMThttp://www.shnenglu.com/cxiaojia/archive/2012/03/13/167815.htmlhttp://www.shnenglu.com/cxiaojia/comments/167815.htmlhttp://www.shnenglu.com/cxiaojia/archive/2012/03/13/167815.html#Feedback1http://www.shnenglu.com/cxiaojia/comments/commentRss/167815.htmlhttp://www.shnenglu.com/cxiaojia/services/trackbacks/167815.html//鍑芥暟鍚嶏細mymemcpy
//鍔熻兘錛氬唴瀛樺鍒?br />//鍑芥暟璇存槑錛氬皢memFrom鎸囧悜鐨勭┖闂村唴瀹瑰鍒剁粰memTo鎸囧悜鐨勭┖闂村唴瀹癸紝澶у皬涓簊ize
void* mymemcpy(void* memTo,const void* memFrom,size_t size)
{
    assert(memTo!=NULL);//鍒ゆ柇鏄惁涓虹┖
    assert(memFrom!=NULL);//鍒ゆ柇鏄惁涓虹┖
    char *tempFrom=(char*)memFrom;
    char *tempTo=(char*)memTo;
    while(size--)
        *tempTo++=*tempFrom++; //澶嶅埗
    return memTo;
}

C灝忓姞 2012-03-13 21:04 鍙戣〃璇勮
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瀛︿範絎旇--絀虹被錛岃櫄鍑芥暟綾伙紝铏氱戶鎵跨被鐨勭┖闂村ぇ灝?/title><link>http://www.shnenglu.com/cxiaojia/archive/2012/03/12/167699.html</link><dc:creator>C灝忓姞</dc:creator><author>C灝忓姞</author><pubDate>Mon, 12 Mar 2012 02:18:00 GMT</pubDate><guid>http://www.shnenglu.com/cxiaojia/archive/2012/03/12/167699.html</guid><wfw:comment>http://www.shnenglu.com/cxiaojia/comments/167699.html</wfw:comment><comments>http://www.shnenglu.com/cxiaojia/archive/2012/03/12/167699.html#Feedback</comments><slash:comments>9</slash:comments><wfw:commentRss>http://www.shnenglu.com/cxiaojia/comments/commentRss/167699.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/cxiaojia/services/trackbacks/167699.html</trackback:ping><description><![CDATA[<div style="background-color:#eeeeee;font-size:13px;border:1px solid #CCCCCC;padding-right: 5px;padding-bottom: 4px;padding-left: 4px;padding-top: 4px;width: 98%;word-break:break-all"><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--><span style="color: #008000; ">//</span><span style="color: #008000; ">姝や唬鐮佸湪32浣峸in涓嬭繍琛屾垚鍔?/span><span style="color: #008000; "><br /></span>#include<iostream><br /><span style="color: #0000FF; ">using</span> <span style="color: #0000FF; ">namespace</span> std;<br /><span style="color: #0000FF; ">class</span> A<span style="color: #008000; ">//</span><span style="color: #008000; ">A鏄┖綾伙紝緙栬瘧鍣ㄤ細鐢ㄤ竴涓猚har綾誨瀷鏍囪榪欎釜綾伙紝澶у皬涓?</span><span style="color: #008000; "><br /></span>{<br /><br />};<br /><span style="color: #0000FF; ">class</span> B:<span style="color: #0000FF; ">public</span> A<span style="color: #008000; ">//</span><span style="color: #008000; ">B緇ф壙浜咥錛屼絾鍚屾牱涔熸槸絀虹被錛屽ぇ灝忎負1</span><span style="color: #008000; "><br /></span>{<br /><br />};<br /><span style="color: #0000FF; ">class</span> C:<span style="color: #0000FF; ">virtual</span> <span style="color: #0000FF; ">public</span> A<span style="color: #008000; ">//</span><span style="color: #008000; ">铏氭嫙緇ф壙鐨勬椂鍊欑紪璇戝櫒浼氬畨鎻掍竴涓寚鍚戠埗綾葷殑鎸囬拡錛屽ぇ灝忎負4</span><span style="color: #008000; "><br /></span>{<br /><br />};<br /><span style="color: #0000FF; ">class</span> D<span style="color: #008000; ">//</span><span style="color: #008000; ">澶у皬涓?</span><span style="color: #008000; "><br /></span>{<br />  <span style="color: #0000FF; ">public</span>:<br />  <span style="color: #0000FF; ">int</span> a;<br />  <span style="color: #0000FF; ">static</span> <span style="color: #0000FF; ">int</span> b;<span style="color: #008000; ">//</span><span style="color: #008000; ">闈欐佸彉閲忚鏀懼湪闈欐佸瓨鍌ㄥ尯</span><span style="color: #008000; "><br /></span>};<br /><span style="color: #0000FF; ">class</span> E <span style="color: #008000; ">//</span><span style="color: #008000; ">print鍑芥暟涓嶅崰鍐呭瓨絀洪棿錛屽ぇ灝忎負4</span><span style="color: #008000; "><br /></span>{<br />    <span style="color: #0000FF; ">public</span>:<br />    <span style="color: #0000FF; ">void</span> print(){cout<<"E"<<endl;}<br />    <span style="color: #0000FF; ">private</span>:<br />    <span style="color: #0000FF; ">int</span> a;<br />};<br /><span style="color: #0000FF; ">class</span> F<span style="color: #008000; ">//</span><span style="color: #008000; ">铏氬嚱鏁頒細鍗犵敤涓涓寚閽堝ぇ灝忕殑鍐呭瓨錛岀郴緇熼渶瑕佺敤榪欎釜鎸囬拡緇存姢铏氬嚱鏁拌〃銆傚ぇ灝忎負8</span><span style="color: #008000; "><br /></span>{<br />    <span style="color: #0000FF; ">public</span>:<br />    <span style="color: #0000FF; ">virtual</span> <span style="color: #0000FF; ">void</span> print(){cout<<"F"<<endl;}<br />    <span style="color: #0000FF; ">private</span>:<br />    <span style="color: #0000FF; ">int</span> a;<br />};<br /><span style="color: #0000FF; ">class</span> G:<span style="color: #0000FF; ">public</span> F<span style="color: #008000; ">//</span><span style="color: #008000; ">澶氫簡涓涓櫄鍑芥暟鍐呭瓨澶у皬涓嶅彉錛屽彲瑙佷竴涓被鍙湁涓涓櫄鍑芥暟鎸囬拡銆傚ぇ灝忎負8</span><span style="color: #008000; "><br /></span>{<br />    <span style="color: #0000FF; ">public</span>:<br />    <span style="color: #0000FF; ">virtual</span> <span style="color: #0000FF; ">void</span> print(){cout<<"G"<<endl;}<br />    <span style="color: #0000FF; ">virtual</span> <span style="color: #0000FF; ">void</span> print2(){cout<<"G2"<<endl;}<br />};<br /><span style="color: #0000FF; ">int</span> main()<br />{<br />    A a;<br />    B b;<br />    C c;<br />    D d;<br />    E e;<br />    F f;<br />    G g;<br />    cout<<<span style="color: #0000FF; ">sizeof</span>(A)<<" "<<<span style="color: #0000FF; ">sizeof</span>(a)<<endl;<span style="color: #008000; ">//</span><span style="color: #008000; ">1 1</span><span style="color: #008000; "><br /></span>    cout<<<span style="color: #0000FF; ">sizeof</span>(B)<<" "<<<span style="color: #0000FF; ">sizeof</span>(b)<<endl;<span style="color: #008000; ">//</span><span style="color: #008000; ">1 1</span><span style="color: #008000; "><br /></span>    cout<<<span style="color: #0000FF; ">sizeof</span>(C)<<" "<<<span style="color: #0000FF; ">sizeof</span>(c)<<endl;<span style="color: #008000; ">//</span><span style="color: #008000; ">4 4</span><span style="color: #008000; "><br /></span>    cout<<<span style="color: #0000FF; ">sizeof</span>(D)<<" "<<<span style="color: #0000FF; ">sizeof</span>(d)<<endl;<span style="color: #008000; ">//</span><span style="color: #008000; ">4 4</span><span style="color: #008000; "><br /></span>    cout<<<span style="color: #0000FF; ">sizeof</span>(E)<<" "<<<span style="color: #0000FF; ">sizeof</span>(e)<<endl;<span style="color: #008000; ">//</span><span style="color: #008000; ">4 4</span><span style="color: #008000; "><br /></span>    cout<<<span style="color: #0000FF; ">sizeof</span>(F)<<" "<<<span style="color: #0000FF; ">sizeof</span>(f)<<endl;<span style="color: #008000; ">//</span><span style="color: #008000; "> 8 8</span><span style="color: #008000; "><br /></span>    cout<<<span style="color: #0000FF; ">sizeof</span>(G)<<" "<<<span style="color: #0000FF; ">sizeof</span>(g)<<endl;<span style="color: #008000; ">//</span><span style="color: #008000; ">8 8</span><span style="color: #008000; "><br /></span><br />    <span style="color: #0000FF; ">return</span> 0;<br />}</div><img src ="http://www.shnenglu.com/cxiaojia/aggbug/167699.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/cxiaojia/" target="_blank">C灝忓姞</a> 2012-03-12 10:18 <a href="http://www.shnenglu.com/cxiaojia/archive/2012/03/12/167699.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>瀛︿範絎旇--const鐨勪綔鐢?/title><link>http://www.shnenglu.com/cxiaojia/archive/2012/03/12/167695.html</link><dc:creator>C灝忓姞</dc:creator><author>C灝忓姞</author><pubDate>Mon, 12 Mar 2012 01:35:00 GMT</pubDate><guid>http://www.shnenglu.com/cxiaojia/archive/2012/03/12/167695.html</guid><wfw:comment>http://www.shnenglu.com/cxiaojia/comments/167695.html</wfw:comment><comments>http://www.shnenglu.com/cxiaojia/archive/2012/03/12/167695.html#Feedback</comments><slash:comments>1</slash:comments><wfw:commentRss>http://www.shnenglu.com/cxiaojia/comments/commentRss/167695.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/cxiaojia/services/trackbacks/167695.html</trackback:ping><description><![CDATA[<div><p>C++<span style="font-family:瀹嬩綋;">涓殑</span>const<span style="font-family:瀹嬩綋;">鍏抽敭瀛楀拰</span>#define<span style="font-family:瀹嬩綋;">鏈変簺鐩鎬技錛?/span>#define<span style="font-family:瀹嬩綋;">鍙槸鐢ㄦ潵鍋氭枃鏈浛鎹㈢殑錛屼細鍑虹幇涓浜涢敊璇茍涓斾笉瀹規槗媯鏌ュ埌銆傚湪</span>C++<span style="font-family:瀹嬩綋;">浠g爜涓敖閲忎嬌鐢?/span>const<span style="font-family:瀹嬩綋;">鑰屼笉鏄?/span>#define<span style="font-family:瀹嬩綋;">銆?/span></p> <p> </p> <p>const<span style="font-family:瀹嬩綋;">鐨勪綔鐢細</span></p> <p style="margin-left:18.0pt;text-indent:-18.0pt;">1銆?nbsp;const<span style="font-family:瀹嬩綋;">鐢ㄤ簬瀹氫箟甯擱噺錛?/span>const<span style="font-family:瀹嬩綋;">瀹氫箟鐨勫父閲忕紪璇戝櫒鍙互瀵瑰叾榪涜鏁版嵁闈欐佺被鍨嬪畨鍏ㄦ鏌ャ?/span></p> <p style="margin-left:18.0pt;text-indent:-18.0pt;">2銆?nbsp;const<span style="font-family:瀹嬩綋;">淇グ褰㈠弬錛氬綋鍙傛暟鏄敤鎴瘋嚜瀹氫箟綾誨瀷鎴栬呮娊璞℃暟鎹被鍨嬫椂錛岀敤</span>const<span style="font-family:瀹嬩綋;">寮曠敤浼犻掕屼笉鏄間紶閫掑彲浠ユ彁楂樻晥鐜囥?/span></p> <p style="margin-left:18.0pt;text-indent:0cm;">Void fun1(A a);</p> <p style="margin-left:18.0pt;text-indent:0cm;">Void fun2(A const &a);</p> <p style="margin-left:18.0pt;text-indent:0cm;"><span style="font-family:瀹嬩綋;">絎簩涓嚱鏁頒笉闇瑕佷駭鐢熶復鏃跺璞★紝鐪佸幓浜嗗璞℃瀯閫犳瀽鏋勬秷鑰楃殑鏃墮棿</span></p> <p style="margin-left:18.0pt;text-indent:-18.0pt;">3銆?nbsp;const<span style="font-family:瀹嬩綋;">淇グ鍑芥暟榪斿洖鍊鹼細濡傛灉鍑芥暟榪斿洖涓涓?/span>const<span style="font-family:瀹嬩綋;">鎸囬拡錛屽垯鍑芥暟榪斿洖鍊煎彧鑳借</span>const<span style="font-family:瀹嬩綋;">鍚岀被鍨嬫寚閽堟帴鏀訛紝鍚﹀垯</span>error<span style="font-family:瀹嬩綋;">銆?/span></p> <p style="margin-left:18.0pt;text-indent:-18.0pt;">4銆?nbsp;const<span style="font-family:瀹嬩綋;">淇グ鎴愬憳鍑芥暟錛氬綋浣犵殑鎴愬憳鍑芥暟涓嶉渶瑕佹敼鍙樻暟鎹垚鍛樼殑鍊兼椂錛屽氨鍔犱笂</span>const<span style="font-family:瀹嬩綋;">淇グ銆?/span></p></div><img src ="http://www.shnenglu.com/cxiaojia/aggbug/167695.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/cxiaojia/" target="_blank">C灝忓姞</a> 2012-03-12 09:35 <a href="http://www.shnenglu.com/cxiaojia/archive/2012/03/12/167695.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>瀛︿範絎旇--main鍑芥暟緇撴潫鍚庣殑璋冪敤http://www.shnenglu.com/cxiaojia/archive/2012/03/11/167667.htmlC灝忓姞C灝忓姞Sun, 11 Mar 2012 11:46:00 GMThttp://www.shnenglu.com/cxiaojia/archive/2012/03/11/167667.htmlhttp://www.shnenglu.com/cxiaojia/comments/167667.htmlhttp://www.shnenglu.com/cxiaojia/archive/2012/03/11/167667.html#Feedback1http://www.shnenglu.com/cxiaojia/comments/commentRss/167667.htmlhttp://www.shnenglu.com/cxiaojia/services/trackbacks/167667.html

鏈互涓轟富鍑芥暟main鏄鍏堣璋冪敤鐨勫嚱鏁幫紝鍚庢潵鍙戠幇鎿嶄綔緋葷粺浼氳皟鐢ㄤ竴涓惎鍔ㄥ嚱鏁幫紝瀵?/span>C++榪愯搴撹繘琛屽垵濮嬪寲銆?/span>

鏈互涓轟富鍑芥暟main琚繑鍥炰箣鍚庢搷浣滅郴緇熷皢鍥炴敹璧勬簮錛屽嵈涓嶇煡涓涓噸瑕佺殑鍑芥暟—atexit()銆?/span>

 

紼嬪簭閫鍑虹殑鏃跺欓渶瑕佷竴浜涜濡傞噴鏀捐祫婧愮殑鎿嶄綔錛屼絾鏄▼搴忕殑閫鍑烘湁寰堝縐嶏紝鍙兘鏄?/span>main鍑芥暟緇撴潫鑼冨洿涓涓間紶閫掔粰exit()錛屼篃鍙兘鏄竴浜涘叾浠栫殑鍘熷洜錛屾墍浠ラ渶瑕佷竴縐嶄笌紼嬪簭緇撴潫鏂瑰紡鏃犲叧鐨勬柟娉曟潵榪涜紼嬪簭閫鍑烘椂蹇呰鐨勫鐞嗐?/span>

 

鍑芥暟鍘熷瀷錛?/span>int atexit(void(*)(void));

鍑芥暟浣滅敤錛氭敞鍐屼竴涓嚱鏁幫紝榪欎釜鍑芥暟鍦ㄧ▼搴忕粨鏉熺殑鏃跺欒璋冪敤

#include<cstdlib>
#include<iostream>
using namespace std;

void fun1()
{
    cout<<"fun1"<<endl;
}
void fun2()
{
    cout<<"fun2"<<endl;
}

int main()
{
    atexit(fun1);//娉ㄥ唽fun1錛屼富鍑芥暟緇堟鏃惰皟鐢?/span>
    atexit(fun2);//娉ㄥ唽fun2錛屼富鍑芥暟緇堟鏃惰皟鐢?/span>
    cout<<"mian exit"<<endl;
    return 0;
}


//榪愯緇撴灉錛?/span>
main exit
fun2
fun1


浠庣粨鏋滀腑鍙互鍙戠幇fun1鍜宖un2涓や釜鍑芥暟鍦ㄤ富鍑芥暟緇撴潫涔嬪悗琚皟鐢紝鑰屼笖璋冪敤鐨勯『搴忎笌娉ㄥ唽鐨勯『搴忕浉鍙嶃?/p>




C灝忓姞 2012-03-11 19:46 鍙戣〃璇勮
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3縐嶄氦鎹㈠彉閲忓肩殑鏂規硶http://www.shnenglu.com/cxiaojia/archive/2012/03/07/167347.htmlC灝忓姞C灝忓姞Wed, 07 Mar 2012 14:03:00 GMThttp://www.shnenglu.com/cxiaojia/archive/2012/03/07/167347.htmlhttp://www.shnenglu.com/cxiaojia/comments/167347.htmlhttp://www.shnenglu.com/cxiaojia/archive/2012/03/07/167347.html#Feedback3http://www.shnenglu.com/cxiaojia/comments/commentRss/167347.htmlhttp://www.shnenglu.com/cxiaojia/services/trackbacks/167347.html
//涓棿鍙橀噺娉?/span>
void swap1(int& a,int& b)
{
    int temp=a;
    a=b;
    b=temp;
}
//鐩鎬簰鍔犲噺娉?/span>
void swap2(int& a,int& b)
{
    a=a+b;//鍙兘浼氭孩鍑?/span>
    b=a-b;
    a=a-b;
}
//寮傛垨娉?/span>
void swap3(int& a,int& b)
{
    a^=b;
    b^=a;
    a^=b;
}

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鑷繁瀹炵幇鐨剆trcpy()鍜宻trlen()浠g爜http://www.shnenglu.com/cxiaojia/archive/2012/02/25/166471.htmlC灝忓姞C灝忓姞Sat, 25 Feb 2012 02:00:00 GMThttp://www.shnenglu.com/cxiaojia/archive/2012/02/25/166471.htmlhttp://www.shnenglu.com/cxiaojia/comments/166471.htmlhttp://www.shnenglu.com/cxiaojia/archive/2012/02/25/166471.html#Feedback7http://www.shnenglu.com/cxiaojia/comments/commentRss/166471.htmlhttp://www.shnenglu.com/cxiaojia/services/trackbacks/166471.html//鍑芥暟鍚嶏細mystrcpy
//鍔熻兘錛氬瓧絎︿覆鐨勫鍒?br />//鍑芥暟璇存槑錛氫粠strSrc鍦板潃寮濮嬬殑瀛楃涓茶祴鍊肩粰strDest錛屼袱鑰呴兘涓嶈兘涓虹┖
char* mystrcpy(char* strDest,const char* strSrc)
{
    assert(strDest!=NULL);//鏂█錛屽鏋滆〃杈懼紡涓哄亣鍒欒緭鍑洪敊璇俊鎭?/span>
    assert(strSrc!=NULL);
    char* p=strDest;
    while((*strDest++=*strSrc++)!='\0');
    return p;
}

//鍑芥暟鍚嶏細mystrlen
//鍔熻兘錛氬瓧絎︿覆鐨勪釜鏁扮粺璁?br />//鍑芥暟璇存槑錛氱粺璁″瓧絎︿覆涓瓧絎︾殑闀垮害錛屼笉鍖呮嫭'\0'錛屽瓧絎︿覆涓嶈兘涓虹┖
unsigned int mystrlen(const char* str)
{
    assert(str!=NULL);
   unsigned int cnt=0;
    while(*str++!='\0') cnt++;
    return cnt;
}

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鑷繁瀹炵幇鐨刟tof()鍜宎toi()浠g爜http://www.shnenglu.com/cxiaojia/archive/2012/02/24/166436.htmlC灝忓姞C灝忓姞Fri, 24 Feb 2012 08:42:00 GMThttp://www.shnenglu.com/cxiaojia/archive/2012/02/24/166436.htmlhttp://www.shnenglu.com/cxiaojia/comments/166436.htmlhttp://www.shnenglu.com/cxiaojia/archive/2012/02/24/166436.html#Feedback3http://www.shnenglu.com/cxiaojia/comments/commentRss/166436.htmlhttp://www.shnenglu.com/cxiaojia/services/trackbacks/166436.html
//鍑芥暟鍚嶏細myatof
//鍔熻兘錛氭妸瀛楃涓茶漿鍖栨垚double嫻偣鍨?br />//鍚嶅瓧鏉ユ簮錛歮y array to floating point numbers  
//鍑芥暟璇存槑錛氭帴鏀朵竴涓瓧絎︿覆鍒ゆ柇絎竴涓瓧絎︾殑絎﹀彿錛屾病鏈夌鍙烽粯璁や負姝e鹼紝鐒跺悗瀵瑰墿浣欏瓧絎︿覆榪涜杞崲錛?/span>//閬囧埌\0緇撴潫錛屾渶鍚庤繑鍥炰竴涓猟ouble

double myatof(const char* sptr)
{
    double temp=10;
    bool ispnum=true;
    double ans=0;
    if(*sptr=='-')//鍒ゆ柇鏄惁鏄礋鏁?/span>
    {
        ispnum=false;
        sptr++;
    }
    else if(*sptr=='+')//鍒ゆ柇鏄惁涓烘鏁?/span>
    {
        sptr++;
    }

    while(*sptr!='\0')//瀵繪壘灝忔暟鐐逛箣鍓嶇殑鏁?/span>
    {
        if(*sptr=='.'){ sptr++;break;}
        ans=ans*10+(*sptr-'0');
        sptr++;
    }
    while(*sptr!='\0')//瀵繪壘灝忔暟鐐逛箣鍚庣殑鏁?/span>
    {
        ans=ans+(*sptr-'0')/temp;
        temp*=10;
        sptr++;
    }
    if(ispnum) return ans;
    else return ans*(-1);
}

//鍑芥暟鍚嶏細myatoi
//鍔熻兘錛氭妸瀛楃涓茶漿鍖栨垚int鏁村瀷
//鍚嶅瓧鏉ユ簮錛歮y array to integer  
//鍑芥暟璇存槑錛氭帴鏀朵竴涓瓧絎︿覆鍒ゆ柇絎竴涓瓧絎︾殑絎﹀彿錛屾病鏈夌鍙烽粯璁や負姝e鹼紝鐒跺悗瀵瑰墿浣欏瓧絎︿覆榪涜杞崲錛?/span>//閬囧埌\0緇撴潫錛屾渶鍚庤繑鍥炰竴涓猧nt

int myatoi(const char* sptr)
{

    bool ispnum=true;
    int ans=0;
    if(*sptr=='-')//鍒ゆ柇鏄惁鏄礋鏁?/span>
    {
        ispnum=false;
        sptr++;
    }
    else if(*sptr=='+')//鍒ゆ柇鏄惁涓烘鏁?/span>
    {
        sptr++;
    }

    while(*sptr!='\0')//綾誨瀷杞寲
    {
        ans=ans*10+(*sptr-'0');
        sptr++;
    }

    if(ispnum) return ans;
    else return ans*(-1);
}


C灝忓姞 2012-02-24 16:42 鍙戣〃璇勮
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瀛︿範絎旇--extern鍏抽敭瀛?/title><link>http://www.shnenglu.com/cxiaojia/archive/2012/02/23/166300.html</link><dc:creator>C灝忓姞</dc:creator><author>C灝忓姞</author><pubDate>Thu, 23 Feb 2012 00:04:00 GMT</pubDate><guid>http://www.shnenglu.com/cxiaojia/archive/2012/02/23/166300.html</guid><wfw:comment>http://www.shnenglu.com/cxiaojia/comments/166300.html</wfw:comment><comments>http://www.shnenglu.com/cxiaojia/archive/2012/02/23/166300.html#Feedback</comments><slash:comments>2</slash:comments><wfw:commentRss>http://www.shnenglu.com/cxiaojia/comments/commentRss/166300.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/cxiaojia/services/trackbacks/166300.html</trackback:ping><description><![CDATA[<div><p>extern<span style="font-family:瀹嬩綋;">鍏抽敭瀛楃殑浣滅敤</span></p> <p style="margin-left:18.0pt;text-indent:-18.0pt;">1銆?nbsp;<span style="font-family:瀹嬩綋;">澹版槑澶栭儴鍙橀噺鎴栬呭嚱鏁?/span></p> <p style="margin-left: 18pt; text-indent: 0cm; "><span style="font-family:瀹嬩綋;">褰撲綘鎵闇瑕佺殑鍙橀噺鎴栬呭嚱鏁板湪鍙︿竴涓枃浠墮噷杈圭殑鏃跺欙紝闄や簡鐢?/span>include<span style="font-family:瀹嬩綋;">鍖呭惈錛岃繕鍙互鐢?/span>extern<span style="font-family:瀹嬩綋;">澹版槑澶栭儴鍙橀噺鎴栬呭嚱鏁般?br /><br /></span></p><div style="background-color:#eeeeee;font-size:13px;border:1px solid #CCCCCC;padding-right: 5px;padding-bottom: 4px;padding-left: 4px;padding-top: 4px;width: 98%;word-break:break-all"><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--><span style="color: #008000; ">//</span><span style="color: #008000; ">File1.cpp</span><span style="color: #008000; "><br /></span><span style="color: #0000FF; ">int</span> a;<br /><span style="color: #0000FF; ">int</span> fun(<span style="color: #0000FF; ">int</span> w)<br />{<br />        <span style="color: #0000FF; ">return</span> ++w;<br />}<br /><br /><span style="color: #008000; ">//</span><span style="color: #008000; ">main.cpp</span><span style="color: #008000; "><br /></span>#include<iostream><br /><span style="color: #0000FF; ">using</span> <span style="color: #0000FF; ">namespace</span> std;<br /><span style="color: #0000FF; ">int</span> main()<br />{<br />        <span style="color: #0000FF; ">extern</span> <span style="color: #0000FF; ">int</span> a;<span style="color: #008000; ">//</span><span style="color: #008000; ">澹版槑澶栭儴鍙橀噺</span><span style="color: #008000; "><br /></span>        <span style="color: #0000FF; ">extern</span> <span style="color: #0000FF; ">int</span> fun(<span style="color: #0000FF; ">int</span> w);<span style="color: #008000; ">//</span><span style="color: #008000; ">澹版槑澶栭儴鍑芥暟</span><span style="color: #008000; "><br /></span><br />        a=5;<br />        cout<<a<<endl;<span style="color: #008000; ">//</span><span style="color: #008000; "> 5</span><span style="color: #008000; "><br /></span>        cout<<fun(a)<<endl;<span style="color: #008000; ">//</span><span style="color: #008000; "> 6</span><span style="color: #008000; "><br /></span>        <span style="color: #0000FF; ">return</span> 0;<br />}</div><div><p>榪欓噷瑕佹敞鎰忕殑涓鐐規槸錛宔xtern鍏抽敭瀛楃殑浣滅敤浠呬粎鏄0鏄庯紝娌℃湁鍒嗛厤鍐呭瓨絀洪棿錛屽0鏄庣殑鏍煎紡鍜屽畾涔夌殑鏍煎紡涓瀹氳涓ユ牸鐩哥銆?/p></div><span style="font-family: 瀹嬩綋; "><br /></span><div><p style="margin-left:18.0pt;text-indent:-18.0pt;">2銆?extern ”C” 閾炬帴鎸囧畾涓篊鍑芥暟搴?/p> <p style="margin-left: 18pt; text-indent: 0cm; ">鍙傛暟閲嶈澆鏄疌++鐨勬柊鐗規э紝鍦–涓槸娌℃湁鐨勩傚湪浣跨敤C++鍐欎唬鐮佺殑鏃跺欙紝濡傛灉璋冪敤C鍑芥暟鍑洪敊錛堝嚭閿欑殑鍘熷洜瑙丆++閲嶈澆鐨勫疄鐜版満鍒訛級錛屽垯闇瑕佸0鏄巈xtern “C”灝嗛摼鎺ユ寚瀹氫負C鍑芥暟搴撱?/p></div>      <div style="font-size: 13px; border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px; border-top-style: solid; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; border-top-color: #cccccc; border-right-color: #cccccc; border-bottom-color: #cccccc; border-left-color: #cccccc; border-image: initial; padding-right: 5px; padding-bottom: 4px; padding-left: 4px; padding-top: 4px; width: 98%; word-break: break-all; background-color: #eeeeee; "><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--><br /><span style="color: #0000FF; ">extern</span> "C" <br />{<br />銆銆<span style="color: #008000; ">/*</span><span style="color: #008000; "><img src="http://www.shnenglu.com/Images/dot.gif" alt="" /></span><span style="color: #008000; ">*/</span><br />銆銆}</div><span style="font-family: 瀹嬩綋; "><br /><br /></span><p> </p></div><img src ="http://www.shnenglu.com/cxiaojia/aggbug/166300.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/cxiaojia/" target="_blank">C灝忓姞</a> 2012-02-23 08:04 <a href="http://www.shnenglu.com/cxiaojia/archive/2012/02/23/166300.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>瀛︿範絎旇--static鍙橀噺涓庢櫘閫氬彉閲忕殑鍖哄埆http://www.shnenglu.com/cxiaojia/archive/2012/02/22/166228.htmlC灝忓姞C灝忓姞Wed, 22 Feb 2012 05:10:00 GMThttp://www.shnenglu.com/cxiaojia/archive/2012/02/22/166228.htmlhttp://www.shnenglu.com/cxiaojia/comments/166228.htmlhttp://www.shnenglu.com/cxiaojia/archive/2012/02/22/166228.html#Feedback1http://www.shnenglu.com/cxiaojia/comments/commentRss/166228.htmlhttp://www.shnenglu.com/cxiaojia/services/trackbacks/166228.html

闈欐佸叏灞鍙橀噺涓庢櫘閫氬叏灞鍙橀噺錛氫袱鑰呯殑瀛樺偍鏂瑰紡鐩稿悓錛岄兘瀛樺偍鍦ㄩ潤鎬佸尯錛岄潤鎬佸叏灞鍙橀噺鐨勪綔鐢ㄥ煙鏄畾涔夎鍙橀噺鐨勬簮鏂囦歡錛屾櫘閫氬叏灞鍙橀噺鐨勪綔鐢ㄥ煙鍒欐槸澶氫釜婧愭枃浠剁殑婧愮▼搴忥紝闈欐佸叏灞鍙橀噺鍙垵濮嬪寲涓嬈°傘?/span>

 

闈欐佸眬閮ㄥ彉閲忎笌鏅氬眬閮ㄥ彉閲?/span>錛氫袱鑰呯殑浣滅敤鍩熺浉鍚岋紝瀛樺偍鏂瑰紡涓嶅悓錛岄潤鎬佸眬閮ㄥ彉閲忓瓨鍌ㄥ湪闈欐佸尯錛屾櫘閫氬眬閮ㄥ彉閲忓瓨鍌ㄥ湪鏍堝尯銆傜敓瀛樻湡涔熶笉鍚岋紝闈欐佸眬閮ㄥ彉閲忕殑鐢熷瓨鏈熶負鏁翠釜紼嬪簭錛屾櫘閫氬眬閮ㄥ彉閲忕殑鐢熷瓨鏈熶粎涓哄畾涔夌殑閭f絀洪棿銆傞潤鎬佸眬閮ㄥ彉閲忓彧鍒濆鍖栦竴嬈°?/span>

 

闈欐佸嚱鏁頒笌鏅氬嚱鏁?/span>錛氫綔鐢ㄥ煙涓嶅悓錛岄潤鎬佸嚱鏁扮殑浣滅敤鍩熶粎鍦ㄨ瀹氫箟鐨勬簮鏂囦歡錛屾櫘閫氬嚱鏁板湪澶存枃浠剁殑杈呭姪涓嬪彲浠ヨ澶栭儴璁塊棶銆傞潤鎬佸嚱鏁板湪鍐呭瓨涓彧鏈変竴浠斤紝鑰屾櫘閫氬嚱鏁板湪鍐呭瓨涓彲浠ユ湁涓浠芥垨鑰呭浠芥嫹璐濄?/span>



C灝忓姞 2012-02-22 13:10 鍙戣〃璇勮
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瀛︿範絎旇--C++閲嶈澆錛堝弬鏁板鎬侊級鐨勫疄鐜版満鍒?/title><link>http://www.shnenglu.com/cxiaojia/archive/2012/02/21/166171.html</link><dc:creator>C灝忓姞</dc:creator><author>C灝忓姞</author><pubDate>Tue, 21 Feb 2012 13:07:00 GMT</pubDate><guid>http://www.shnenglu.com/cxiaojia/archive/2012/02/21/166171.html</guid><wfw:comment>http://www.shnenglu.com/cxiaojia/comments/166171.html</wfw:comment><comments>http://www.shnenglu.com/cxiaojia/archive/2012/02/21/166171.html#Feedback</comments><slash:comments>1</slash:comments><wfw:commentRss>http://www.shnenglu.com/cxiaojia/comments/commentRss/166171.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/cxiaojia/services/trackbacks/166171.html</trackback:ping><description><![CDATA[<div><p>C++<span style="font-family:瀹嬩綋;">緇ф壙浜?/span>C<span style="font-family:瀹嬩綋;">鐨勫叏閮ㄧ壒鎬э紝瀵?/span>C<span style="font-family:瀹嬩綋;">瀹炵幇浜嗗叏闈㈠吋瀹廣?/span>C++<span style="font-family:瀹嬩綋;">鍙堝疄鐜頒簡涓浜涙柊鐨勭壒鎬э紝姣斿璇村嚱鏁扮殑閲嶈澆銆?/span></p> <p><span style="font-family:瀹嬩綋;">瑕佸疄鐜板嚱鏁扮殑閲嶈澆灝辮鏀瑰彉鍘熸湁鐨勫湪</span>C<span style="font-family:瀹嬩綋;">涓嚱鏁板畾涔夌殑鏈哄埗錛屽湪</span>C<span style="font-family:瀹嬩綋;">涓畾涔夊嚱鏁?/span>fun(int a,int b)<span style="font-family:瀹嬩綋;">錛岀紪璇戝櫒浼氭妸</span>_fun<span style="font-family:瀹嬩綋;">鍐欏叆絎﹀彿搴撲腑錛屼嬌鐢?/span>fun()<span style="font-family:瀹嬩綋;">鏃朵細鍦ㄧ鍙峰簱涓壘鍒?/span>_fun<span style="font-family:瀹嬩綋;">錛屽茍璋冪敤銆?/span></p> <p><span style="font-family:瀹嬩綋;">鍦?/span>C++<span style="font-family:瀹嬩綋;">涓紝鐢變簬瑕佸疄鐜伴噸杞斤紝闇瑕佸姞涓婂弬鏁扮殑鐗規э紝浜庢槸灝卞彉鎴愪簡</span>_fun_int_int<span style="font-family:瀹嬩綋;">錛屽綋鍑芥暟涓?/span>fun(int a,double b)<span style="font-family:瀹嬩綋;">鏃訛紝緙栬瘧鍣ㄥ氨浼氭妸</span>_fun_int_double<span style="font-family: 瀹嬩綋; ">鍐欏叆絎﹀彿搴擄紝榪欐牱灝卞疄鐜頒簡鍙傛暟鐨勫鎬併?/span></p> <p> </p></div><img src ="http://www.shnenglu.com/cxiaojia/aggbug/166171.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/cxiaojia/" target="_blank">C灝忓姞</a> 2012-02-21 21:07 <a href="http://www.shnenglu.com/cxiaojia/archive/2012/02/21/166171.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>鏁扮粍鍚嶆槸鎸囬拡涔堬紵http://www.shnenglu.com/cxiaojia/archive/2011/12/23/shuzuming.htmlC灝忓姞C灝忓姞Fri, 23 Dec 2011 14:27:00 GMThttp://www.shnenglu.com/cxiaojia/archive/2011/12/23/shuzuming.htmlhttp://www.shnenglu.com/cxiaojia/comments/162695.htmlhttp://www.shnenglu.com/cxiaojia/archive/2011/12/23/shuzuming.html#Feedback2http://www.shnenglu.com/cxiaojia/comments/commentRss/162695.htmlhttp://www.shnenglu.com/cxiaojia/services/trackbacks/162695.html
鎴戝彊榪頒竴涓嬫垜鎵鐭ラ亾鐨勬暟緇勫悕涓庢寚閽堢殑鍖哄埆銆?br />
1銆佸湴鍧鐩稿悓錛屽ぇ灝忎笉鍚?/strong>
鐪嬩笅闈唬鐮侊細
1     int arr[10];
2     int* p=arr;
3     cout<<arr<<endl;
4     cout<<p<<endl;
5     cout<<sizeof(arr)<<endl;//緇撴灉涓?0
6     cout<<sizeof(p)<<endl;//緇撴灉涓?

arr涓烘暟緇勫悕錛宲涓烘寚閽堛?br />絎?銆?琛岃緭鍑虹殑鍊間竴鏍鳳紝涔熷氨鏄arr鍜宲閮芥槸鏁扮粍鐨勯鍦板潃銆傜5銆?琛岀殑緇撴灉涓嶄竴鏍鳳紝arr鐨勫ぇ灝忔槸鏁翠釜鏁扮粍鐨勫ぇ灝忥紝鑰宲鐨勫ぇ灝忔槸鎸囬拡鐨勫ぇ灝忋?br />涓轟粈涔坅rr鐨勫ぇ灝忎細鏄?0錛?br />
2銆侀兘鍙互鐢ㄦ寚閽堜綔涓哄艦鍙?/strong>
鎸囬拡鐨勫艦鍙傚綋鐒舵槸鎸囬拡銆傛暟緇勭殑褰㈠弬鍙互鏄暟緇勶紝涔熷彲浠ユ槸鎸囬拡銆備笅闈唬鐮佸嵃璇佷簡鏁扮粍鐨勫艦鍙傚彲浠ユ槸鎸囬拡銆?br />
 1 void fun(int* p)
 2 {
 3     cout<<p[0]<<endl;
 4 }
 5 
 6 
 7 int main()
 8 {
 9     int arr[10]={0};
10     int* p=arr;
11     fun(arr);
12     
13     return 0;
14 }

榪欑偣鍙互鐪嬪嚭錛屾暟緇勫悕瀹屽叏鍙互褰撴垚鎸囬拡鏉ョ敤銆?br />
3銆佹寚閽堝彲浠ヨ嚜鍔狅紝鏁扮粍鍚嶄笉鍙互

1     int arr[10]={0};
2     int* p=arr;
3     arr++;
4     p++;

褰撴暟緇勫悕鑷姞鏃剁▼搴忕紪璇戝氨浼氬嚭閿欙紝浠庤繖鐐瑰簲璇ュ彲浠ョ湅鍑猴紝鏁扮粍鍚嶆槸涓涓父閲忥紙const 淇グ錛夈?br />

4銆佷綔涓哄弬鏁扮殑鏁扮粍鍚嶇殑澶у皬鍜屾寚閽堢殑澶у皬鐩稿悓

1 void fun(int arr[])
2 {
3     cout<<sizeof(arr)<<endl;//緇撴灉涓?
4     arr++;//緙栬瘧鎴愬姛
5 }
6 

arr鐨勫ぇ灝忓彉涓?銆乤rr++鎴愬姛緙栬瘧鍙互紜畾錛屼綔涓哄弬鏁扮殑arr宸茬粡瀹屽叏鍙樻垚浜嗕竴涓寚閽堛?br />
浠ヤ笂灝辨槸鎴戞墍鐭ラ亾鐨勬寚閽堜笌鏁扮粍鍚嶇殑鍖哄埆錛屽鏋滆繕鏈夊埆鐨勫尯鍒鐣欒█鍛婅瘔鎴戯紝濡傛灉璋佺煡閬撴暟緇勫悕鍒板簳鏄竴縐嶄粈涔堟牱鐨勭粨鏋勶紝涔熻鐣欒█鍛婄煡錛岃阿璋㈠搱銆?br />





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C++瀹炵幇鍗曚緥妯″紡http://www.shnenglu.com/cxiaojia/archive/2011/12/21/danli.htmlC灝忓姞C灝忓姞Wed, 21 Dec 2011 06:41:00 GMThttp://www.shnenglu.com/cxiaojia/archive/2011/12/21/danli.htmlhttp://www.shnenglu.com/cxiaojia/comments/162531.htmlhttp://www.shnenglu.com/cxiaojia/archive/2011/12/21/danli.html#Feedback15http://www.shnenglu.com/cxiaojia/comments/commentRss/162531.htmlhttp://www.shnenglu.com/cxiaojia/services/trackbacks/162531.html
鍗曚緥妯″紡錛歋ingleton 
鍗曚緥妯″紡紜繚鏌愪竴涓被鍙湁涓涓疄渚嬶紝鑰屼笖鑷瀹炰緥鍖栧茍鍚戞暣涓郴緇熸彁渚涜繖涓疄渚嬪崟渚嬫ā寮忋傚崟渚嬫ā寮忓彧搴斿湪鏈夌湡姝g殑“鍗曚竴瀹炰緥”鐨勯渶姹傛椂鎵嶅彲浣跨敤銆?br />
鎴戝疄鐜頒簡涓涓畝鍗曠殑鍗曚緥綾伙紝嬈㈣繋鍚愭Ы銆?br />
#include<iostream>
using namespace std;

class Singleton
{
public:
    
static Singleton * GetInstance()//閫氳繃闈欐佸叕鏈夊嚱鏁拌幏寰楄綾葷殑瀹炰緥瀵硅薄
    {
        
if(m_pInstance==NULL)
        m_pInstance
=new Singleton();
        
return m_pInstance;
    }

private:
    Singleton(){}
//鏋勯犲嚱鏁扮鏈夊寲鐨勭洰鐨勬槸涓轟簡闃叉浠庡埆澶勫疄渚嬪寲璇ョ被瀵硅薄
    static Singleton * m_pInstance;
    
class Garbo//鍒犻櫎Singleton瀹炰緥鐨勫璞?/span>
    {
    
public:
        
~Garbo()
        {
            
if(Singleton::m_pInstance)
            {
                delete Singleton::m_pInstance;
            }
        }
    };
    
static Garbo gb;//鍦ㄧ▼搴忕粨鏉熸椂錛岀郴緇熶細璋冪敤瀹冪殑鏋愭瀯鍑芥暟
};
Singleton 
* Singleton::m_pInstance=NULL;//鍒濆鍖栭潤鎬佹暟鎹垚鍛?br />
int main()
{
    Singleton 
*sl=Singleton::GetInstance();
    
return 0;
}


]]>
瀛︿範絎旇--C/C++鍐呭瓨鍒掑垎http://www.shnenglu.com/cxiaojia/archive/2011/11/30/neicun.htmlC灝忓姞C灝忓姞Wed, 30 Nov 2011 03:31:00 GMThttp://www.shnenglu.com/cxiaojia/archive/2011/11/30/neicun.htmlhttp://www.shnenglu.com/cxiaojia/comments/161222.htmlhttp://www.shnenglu.com/cxiaojia/archive/2011/11/30/neicun.html#Feedback0http://www.shnenglu.com/cxiaojia/comments/commentRss/161222.htmlhttp://www.shnenglu.com/cxiaojia/services/trackbacks/161222.html

鍏充簬C++鍐呭瓨鐨勫垝鍒嗭紝緗戜笂鐨勬葷粨宸茬粡寰堣緇嗕簡銆備笅杈規槸鎴戣漿杞界殑涓閮ㄥ垎銆?br />
涓銆佷竴涓粡榪囩紪璇戠殑C/C++鐨勭▼搴忓崰鐢ㄧ殑鍐呭瓨鍒嗘垚浠ヤ笅鍑犱釜閮ㄥ垎錛?/p>

 

銆銆1銆佹爤鍖猴紙stack錛夛細鐢辯紪璇戝櫒鑷姩鍒嗛厤鍜岄噴鏀撅紝瀛樻斁鍑芥暟鐨勫弬鏁板箋佸眬閮ㄥ彉閲忕殑鍊肩瓑錛岀敋鑷沖嚱鏁扮殑璋冪敤榪囩▼閮芥槸鐢ㄦ爤鏉ュ畬鎴愩傚叾鎿嶄綔鏂瑰紡綾諱技浜庢暟鎹粨鏋勪腑鐨勬爤銆?/p>

 

銆銆2銆佸爢鍖猴紙heap錛?錛氫竴鑸敱紼嬪簭鍛樻墜鍔ㄧ敵璇蜂互鍙婇噴鏀撅紝 鑻ョ▼搴忓憳涓嶉噴鏀撅紝紼嬪簭緇撴潫鏃跺彲鑳界敱OS鍥炴敹銆傛敞鎰忓畠涓庢暟鎹粨鏋勪腑鐨勫爢鏄袱鍥炰簨錛屽垎閰嶆柟寮忕被浼間簬閾捐〃銆?/p>

 

銆銆3銆佸叏灞鍖猴紙闈欐佸尯錛夛紙static錛夛細鍏ㄥ眬鍙橀噺鍜岄潤鎬佸彉閲忕殑瀛樺偍鏄斁鍦ㄤ竴鍧楃殑錛屽垵濮嬪寲鐨勫叏灞鍙橀噺鍜岄潤鎬佸彉閲忓湪涓鍧楀尯鍩燂紝鏈垵濮嬪寲鐨勫叏灞鍙橀噺鍜屾湭鍒濆鍖栫殑闈欐佸彉閲忓湪鐩擱偦鐨勫彟涓鍧楀尯鍩熴傜▼搴忕粨鏉熷悗鐢辯郴緇熼噴鏀劇┖闂淬?/p>

 

銆銆4銆佹枃瀛楀父閲忓尯錛氬父閲忓瓧絎︿覆灝辨槸鏀懼湪榪欓噷鐨勩?紼嬪簭緇撴潫鍚庣敱緋葷粺閲婃斁絀洪棿銆?/p>

 

銆銆5銆佺▼搴忎唬鐮佸尯錛氬瓨鏀懼嚱鏁頒綋鐨勪簩榪涘埗浠g爜銆?/p>

 

銆銆涓嬮潰鐨勪緥瀛愬彲浠ュ畬鍏ㄥ睍紺轟笉鍚岀殑鍙橀噺鎵鍗犵殑鍐呭瓨鍖哄煙錛?/p>

 

 
銆銆int a = 0; 鍏ㄥ眬鍒濆鍖栧尯
 
銆銆char *p1; 鍏ㄥ眬鏈垵濮嬪寲鍖?br /> 
銆銆main()
 
銆銆{
 
銆銆int b; //鏍堜腑
 
銆銆char s[] = "abc"; //鏍堜腑
 
銆銆char *p2; //鏍堜腑
 
銆銆char *p3 = "123456"; //123456\0鍦ㄥ父閲忓尯錛宲3鍦ㄦ爤涓?/span>
 
銆銆static int c =0錛?nbsp;//鍏ㄥ眬錛堥潤鎬侊級鍒濆鍖栧尯
 
銆銆
//浠ヤ笅鍒嗛厤寰楀埌鐨?0鍜?0瀛楄妭鐨勫尯鍩熷氨鍦ㄥ爢鍖?/span>
 
銆銆p1 = (char *)malloc(10);
 
銆銆p2 = new char[20];//(char *)malloc(20);
 
銆銆strcpy(p1, "123456"); //123456\0鏀懼湪甯擱噺鍖猴紝緙栬瘧鍣ㄥ彲鑳戒細灝嗗畠涓巔3鎵鎸囧悜鐨?123456"浼樺寲鎴愪竴涓湴鏂廣?/span>
 
銆銆}

 

銆銆浜屻佹爤錛坰tack錛夊拰鍫嗭紙heap錛夊叿浣撶殑鍖哄埆銆?/p>

 

銆銆1銆佸湪鐢寵鏂瑰紡涓?/p>

 

銆銆鏍堬紙stack錛? 鐜板湪寰堝浜洪兘縐頒箣涓哄爢鏍堬紝榪欎釜鏃跺欏疄闄呬笂榪樻槸鎸囩殑鏍堛傚畠鐢辯紪璇戝櫒鑷姩綆$悊錛屾棤闇鎴戜滑鎵嬪伐鎺у埗銆備緥濡傦紝澹版槑鍑芥暟涓殑涓涓眬閮ㄥ彉閲?int b 緋葷粺鑷姩鍦ㄦ爤涓負b寮杈熺┖闂達紱鍦ㄨ皟鐢ㄤ竴涓嚱鏁版椂錛岀郴緇熻嚜鍔ㄧ殑緇欏嚱鏁扮殑褰㈠弬鍙橀噺鍦ㄦ爤涓紑杈熺┖闂淬?/p>

 

銆銆鍫嗭紙heap錛? 鐢寵鍜岄噴鏀劇敱紼嬪簭鍛樻帶鍒訛紝騫舵寚鏄庡ぇ灝忋傚鏄撲駭鐢焟emory leak銆?/p>

 

銆銆鍦–涓嬌鐢╩alloc鍑芥暟銆?/p>

 

銆銆濡傦細p1 = (char *)malloc(10);

 

銆銆鍦–++涓敤new榪愮畻絎︺?/p>

 

銆銆濡傦細p2 = new char[20];//(char *)malloc(10);

 

銆銆浣嗘槸娉ㄦ剰p1鏈韓鍦ㄥ叏灞鍖猴紝鑰宲2鏈韓鏄湪鏍堜腑鐨勶紝鍙槸瀹冧滑鎸囧悜鐨勭┖闂存槸鍦ㄥ爢涓?br />
      new鐨勬湰璐ㄨ繕鏄嬌鐢╩alloc鐨勶紝浣嗘槸new鍜宮alloc榪樻槸鏈夊緢澶у尯鍒細

      錛?錛塵alloc鏄疌璇█涓殑鍑芥暟錛宯ew鏄疌++涓殑鎿嶄綔絎?br />
      錛?錛塵alloc鐨勮繑鍥炲兼槸VOID*錛宯ew榪斿洖鍊兼槸甯︽湁綾誨瀷鐨?br />
      錛?錛塵alloc鍙礋璐e垎閰嶅唴瀛樿屼笉浼氳皟鐢ㄧ被鐨勬瀯閫犲嚱鏁幫紝new涓嶄粎浼氬垎閰嶅唴瀛橈紝榪樹細璋冪敤綾葷殑鏋勯犲嚱鏁?/p>

 

銆銆2銆佺敵璇峰悗緋葷粺鐨勫搷搴斾笂

 

銆銆鏍堬紙stack錛?鍙鏍堢殑鍓╀綑絀洪棿澶т簬鎵鐢寵絀洪棿錛岀郴緇熷皢涓虹▼搴忔彁渚涘唴瀛橈紝鍚﹀垯灝嗘姤寮傚父鎻愮ず鏍堟孩鍑恒?/p>

 

銆銆鍫嗭紙heap錛? 棣栧厛搴旇鐭ラ亾鎿嶄綔緋葷粺鏈変竴涓褰曠┖闂插唴瀛樺湴鍧鐨勯摼琛紝褰撶郴緇熸敹鍒扮▼搴忕殑鐢寵鏃訛紝浼氶亶鍘嗚閾捐〃錛屽鎵劇涓涓┖闂村ぇ浜庢墍鐢寵絀洪棿鐨勫爢緇撶偣錛岀劧鍚庡皢璇ョ粨鐐逛粠絀洪棽緇撶偣閾捐〃涓垹闄わ紝騫跺皢璇ョ粨鐐圭殑絀洪棿鍒嗛厤緇欑▼搴忋傚彟澶栵紝瀵逛簬澶у鏁扮郴緇燂紝浼氬湪榪欏潡鍐呭瓨絀洪棿涓殑棣栧湴鍧澶勮褰曟湰嬈″垎閰嶇殑澶у皬錛岃繖鏍鳳紝浠g爜涓殑delete鎴杅ree璇彞鎵嶈兘姝g‘鐨勯噴鏀炬湰鍐呭瓨絀洪棿銆傚彟澶栵紝鐢變簬鎵懼埌鐨勫爢緇撶偣鐨勫ぇ灝忎笉涓瀹氭濂界瓑浜庣敵璇風殑澶у皬錛岀郴緇熶細鑷姩鐨勫皢澶氫綑鐨勯偅閮ㄥ垎閲嶆柊鏀懼叆絀洪棽閾捐〃涓?/p>

 

銆3銆佺敵璇峰ぇ灝忕殑闄愬埗

 

銆銆鏍堬紙stack錛?鍦╓indows涓?鏍堟槸鍚戜綆鍦板潃鎵╁睍鐨勬暟鎹粨鏋勶紝鏄竴鍧楄繛緇殑鍐呭瓨鐨勫尯鍩熴傝繖鍙ヨ瘽鐨勬剰鎬濇槸鏍堥《鐨勫湴鍧鍜屾爤鐨勬渶澶у閲忔槸緋葷粺棰勫厛瑙勫畾濂界殑錛屽湪Windows涓嬶紝鏍堢殑澶у皬鏄?M錛堜篃鏈夌殑璇存槸1M錛屾諱箣鏄竴涓紪璇戞椂灝辯‘瀹氱殑甯告暟錛夛紝濡傛灉鐢寵鐨勭┖闂磋秴榪囨爤鐨勫墿浣欑┖闂存椂錛屽皢鎻愮ずoverflow銆傚洜姝わ紝鑳戒粠鏍堣幏寰楃殑絀洪棿杈冨皬銆備緥濡傦紝鍦╒C6涓嬮潰錛岄粯璁ょ殑鏍堢┖闂村ぇ灝忔槸1M錛堝ソ鍍忔槸錛岃涓嶆竻妤氫簡錛夈傚綋鐒訛紝鎴戜滑鍙互淇敼錛氭墦寮宸ョ▼錛屼緷嬈℃搷浣滆彍鍗曞涓嬶細Project->Setting->Link錛屽湪Category 涓変腑Output錛岀劧鍚庡湪Reserve涓瀹氬爢鏍堢殑鏈澶у煎拰commit銆?/p>

 

銆銆娉ㄦ剰錛歳eserve鏈灝忓間負4Byte錛沜ommit鏄繚鐣欏湪铏氭嫙鍐呭瓨鐨勯〉鏂囦歡閲岄潰錛屽畠璁劇疆鐨勮緝澶т細浣挎爤寮杈熻緝澶х殑鍊鹼紝鍙兘澧炲姞鍐呭瓨鐨勫紑閿鍜屽惎鍔ㄦ椂闂淬?/p>

 

銆銆鍫嗭紙heap錛? 鍫嗘槸鍚戦珮鍦板潃鎵╁睍鐨勬暟鎹粨鏋勶紝鏄笉榪炵畫鐨勫唴瀛樺尯鍩燂紙絀洪棽閮ㄥ垎鐢ㄩ摼琛ㄤ覆鑱旇搗鏉ワ級銆傛鏄敱浜庣郴緇熸槸鐢ㄩ摼琛ㄦ潵瀛樺偍絀洪棽鍐呭瓨錛岃嚜鐒舵槸涓嶈繛緇殑錛岃岄摼琛ㄧ殑閬嶅巻鏂瑰悜鏄敱浣庡湴鍧鍚戦珮鍦板潃銆備竴鑸潵璁插湪32浣嶇郴緇熶笅錛屽爢鍐呭瓨鍙互杈懼埌4G鐨勭┖闂達紝浠庤繖涓搴︽潵鐪嬪爢鍐呭瓨鍑犱箮鏄病鏈変粈涔堥檺鍒剁殑銆傜敱姝ゅ彲瑙侊紝鍫嗚幏寰楃殑絀洪棿姣旇緝鐏墊椿錛屼篃姣旇緝澶с?/p>

 

銆銆4銆佸垎閰嶇┖闂寸殑鏁堢巼涓?/p>

 

銆銆鏍堬紙stack錛?鏍堟槸鏈哄櫒緋葷粺鎻愪緵鐨勬暟鎹粨鏋勶紝璁$畻鏈轟細鍦ㄥ簳灞傚鏍堟彁渚涙敮鎸侊細鍒嗛厤涓撻棬鐨勫瘎瀛樺櫒瀛樻斁鏍堢殑鍦板潃錛屽帇鏍堝嚭鏍堥兘鏈変笓闂ㄧ殑鎸囦護鎵ц錛岃繖灝卞喅瀹氫簡鏍堢殑鏁堢巼姣旇緝楂樸備絾紼嬪簭鍛樻棤娉曞鍏惰繘琛屾帶鍒躲?/p>

 

銆銆鍫嗭紙heap錛?鏄疌/C++鍑芥暟搴撴彁渚涚殑錛岀敱new鎴杕alloc鍒嗛厤鐨勫唴瀛橈紝涓鑸熷害姣旇緝鎱紝鑰屼笖瀹規槗浜х敓鍐呭瓨紕庣墖銆傚畠鐨勬満鍒舵槸寰堝鏉傜殑錛屼緥濡備負浜嗗垎閰嶄竴鍧楀唴瀛橈紝搴撳嚱鏁頒細鎸夌収涓瀹氱殑綆楁硶錛堝叿浣撶殑綆楁硶鍙互鍙傝冩暟鎹粨鏋?鎿嶄綔緋葷粺錛夊湪鍫嗗唴瀛樹腑鎼滅儲鍙敤鐨勮凍澶熷ぇ灝忕殑絀洪棿錛屽鏋滄病鏈夎凍澶熷ぇ灝忕殑絀洪棿錛堝彲鑳芥槸鐢變簬鍐呭瓨紕庣墖澶錛夛紝灝辨湁鍙兘璋冪敤緋葷粺鍔熻兘鍘誨鍔犵▼搴忔暟鎹鐨勫唴瀛樼┖闂達紝榪欐牱灝辨湁鏈轟細鍒嗗埌瓚沖澶у皬鐨勫唴瀛橈紝鐒跺悗榪涜榪斿洖銆傝繖鏍峰彲鑳藉紩鍙戠敤鎴鋒佸拰鏍稿績鎬佺殑鍒囨崲錛屽唴瀛樼殑鐢寵錛屼唬浠峰彉寰楁洿鍔犳槀璐點傛樉鐒訛紝鍫嗙殑鏁堢巼姣旀爤瑕佷綆寰楀銆?/p>

 

銆銆5銆佸爢鍜屾爤涓殑瀛樺偍鍐呭

 

銆銆鏍堬紙stack錛?鍦ㄥ嚱鏁拌皟鐢ㄦ椂錛岀涓涓繘鏍堢殑鏄富鍑芥暟涓瓙鍑芥暟璋冪敤鍚庣殑涓嬩竴鏉℃寚浠わ紙瀛愬嚱鏁拌皟鐢ㄨ鍙ョ殑涓嬩竴鏉″彲鎵ц璇彞錛夌殑鍦板潃錛岀劧鍚庢槸瀛愬嚱鏁扮殑鍚勪釜褰㈠弬銆傚湪澶у鏁扮殑C緙栬瘧鍣ㄤ腑錛屽弬鏁版槸鐢卞彸寰宸﹀叆鏍堢殑錛岀劧鍚庢槸瀛愬嚱鏁頒腑鐨勫眬閮ㄥ彉閲忋傛敞鎰忥細闈欐佸彉閲忔槸涓嶅叆鏍堢殑銆傚綋鏈鍑芥暟璋冪敤緇撴潫鍚庯紝灞閮ㄥ彉閲忓厛鍑烘爤錛岀劧鍚庢槸鍙傛暟錛屾渶鍚庢爤欏舵寚閽堟寚鍚戞渶寮濮嬪瓨鐨勫湴鍧錛屼篃灝辨槸涓誨嚱鏁頒腑瀛愬嚱鏁拌皟鐢ㄥ畬鎴愮殑涓嬩竴鏉℃寚浠わ紝紼嬪簭鐢辮鐐圭戶緇繍琛屻?/p>

 

銆銆鍫嗭紙heap錛?涓鑸槸鍦ㄥ爢鐨勫ご閮ㄧ敤涓涓瓧鑺傚瓨鏀懼爢鐨勫ぇ灝忥紝鍫嗕腑鐨勫叿浣撳唴瀹規湁紼嬪簭鍛樺畨鎺掋?/p>

 

銆銆6銆佸瓨鍙栨晥鐜囩殑姣旇緝

 

銆銆榪欎釜搴旇鏄樉鑰屾槗瑙佺殑銆傛嬁鏍堜笂鐨勬暟緇勫拰鍫嗕笂鐨勬暟緇勬潵璇達細

 


void main()
 
銆銆{
 
銆銆int arr[5]={1,2,3,4,5};
 
銆銆int *arr1;
 
銆銆arr1=new int[5];
 
銆銆for (int j=0;j<=4;j++)
 
銆銆{
 
銆銆arr1[j]=j+6;
 
銆銆}
 
銆銆int a=arr[1];
 
銆銆int b=arr1[1];
 
銆銆}

 

銆銆涓婇潰浠g爜涓紝arr1錛堝眬閮ㄥ彉閲忥級鏄湪鏍堜腑錛屼絾鏄寚鍚戠殑絀洪棿紜湪鍫嗕笂錛屼袱鑰呯殑瀛樺彇鏁堢巼錛屽綋鐒舵槸arr楂樸傚洜涓篴rr[1]鍙互鐩存帴璁塊棶錛屼絾鏄闂產rr1[1]錛岄鍏堣璁塊棶鏁扮粍鐨勮搗濮嬪湴鍧arr1錛岀劧鍚庢墠鑳借闂埌arr1[1]銆?/p>

 

銆銆鎬昏岃█涔嬶紝璦鑰屾諱箣錛?/p>

 

銆銆鍫嗗拰鏍堢殑鍖哄埆鍙互鐢ㄥ涓嬬殑姣斿柣鏉ョ湅鍑猴細

 

銆銆浣跨敤鏍堝氨璞℃垜浠幓楗閲屽悆楗紝鍙鐐硅彍錛堝0鏄庡彉閲忥級銆佷粯閽便佸拰鍚冿紙浣跨敤錛夛紝鍚冮ケ浜嗗氨璧幫紝涓嶅繀鐞嗕細鍒囪彍銆佹礂鑿滅瓑鍑嗗宸ヤ綔鍜屾礂紕椼佸埛閿呯瓑鎵熬宸ヤ綔錛屼粬鐨勫ソ澶勬槸蹇嵎錛屼絾鏄嚜鐢卞害灝忋?/p>

 

銆銆浣跨敤鍫嗗氨璞℃槸鑷繁鍔ㄦ墜鍋氬枩嬈㈠悆鐨勮彍鑲達紝姣旇緝楹葷儲錛屼絾鏄瘮杈冪鍚堣嚜宸辯殑鍙e懗錛岃屼笖鑷敱搴﹀ぇ銆?/p>

]]>
鍏充簬鎷瘋礉錛堝鍒訛級鏋勯犲嚱鏁頒負浠涔堜笉鑳界敤鍊間紶閫?/title><link>http://www.shnenglu.com/cxiaojia/archive/2011/11/22/cpp1.html</link><dc:creator>C灝忓姞</dc:creator><author>C灝忓姞</author><pubDate>Tue, 22 Nov 2011 11:46:00 GMT</pubDate><guid>http://www.shnenglu.com/cxiaojia/archive/2011/11/22/cpp1.html</guid><wfw:comment>http://www.shnenglu.com/cxiaojia/comments/160730.html</wfw:comment><comments>http://www.shnenglu.com/cxiaojia/archive/2011/11/22/cpp1.html#Feedback</comments><slash:comments>2</slash:comments><wfw:commentRss>http://www.shnenglu.com/cxiaojia/comments/commentRss/160730.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/cxiaojia/services/trackbacks/160730.html</trackback:ping><description><![CDATA[褰撲綘灝濊瘯鐫鎶婃嫹璐濇瀯閫犲嚱鏁板啓鎴愬間紶閫掔殑鏃跺欙紝浼氬彂鐜扮紪璇戦兘閫氫笉榪囷紝閿欒淇℃伅濡備笅錛?br /><span style="color: red; ">error: invalid constructor; you probably meant 'S (const S&)' </span>錛堝ぇ鑷存剰鎬濇槸錛氭棤鏁堢殑鏋勯犲嚱鏁幫紝浣犲簲璇ュ啓鎴愩傘傘傦級<br />褰撶紪璇戦敊璇殑鏃跺欎綘灝卞紑濮嬬籂緇撲簡錛屼負浠涔堟嫹璐濇瀯閫犲嚱鏁頒竴瀹氳浣跨敤寮曠敤浼犻掑憿錛屾垜涓婄綉鏌ユ壘浜嗚澶氳祫鏂欙紝澶у鐨勬剰鎬濆熀鏈笂閮芥槸璇村鏋滅敤鍊間紶閫掔殑璇濆彲鑳戒細浜х敓姝誨驚鐜傜紪璇戝櫒鍙兘鍩轟簬榪欐牱鐨勫師鍥犱笉鍏佽鍑虹幇鍊間紶閫掔殑鎷瘋礉鏋勯犲嚱鏁幫紝涔熸湁鍙兘鏄疌++鏍囧噯鏄繖鏍瘋瀹氱殑銆?div><br />濡傛灉鐪熸槸浜х敓姝誨驚鐜繖涓師鍥犵殑璇濓紝搴旇鏄繖鏍峰瓙鐨勶細<br /><div style="font-size: 13px; border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px; border-top-style: solid; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; border-top-color: #cccccc; border-right-color: #cccccc; border-bottom-color: #cccccc; border-left-color: #cccccc; padding-right: 5px; padding-bottom: 4px; padding-left: 4px; padding-top: 4px; width: 98%; word-break: break-all; background-color: #eeeeee; "><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--><span style="color: #000000; "><br />#include</span><span style="color: #000000; "><</span><span style="color: #000000; ">iostream</span><span style="color: #000000; ">></span><span style="color: #000000; "><br /></span><span style="color: #0000FF; ">using</span><span style="color: #000000; "> </span><span style="color: #0000FF; ">namespace</span><span style="color: #000000; "> std;<br /></span><span style="color: #0000FF; ">class</span><span style="color: #000000; "> S<br />{<br />  </span><span style="color: #0000FF; ">int</span><span style="color: #000000; "> a;<br />  </span><span style="color: #0000FF; ">public</span><span style="color: #000000; ">:<br />  S(</span><span style="color: #0000FF; ">int</span><span style="color: #000000; "> x):a(x){}<br />  S(</span><span style="color: #0000FF; ">const</span><span style="color: #000000; "> S st){</span><span style="color: #0000FF; ">this</span><span style="color: #000000; ">-></span><span style="color: #000000; ">a</span><span style="color: #000000; ">=</span><span style="color: #000000; ">st.a;}</span><span style="color: #008000; ">//</span><span style="color: #008000; ">鎷瘋礉鏋勯犲嚱鏁?/span><span style="color: #008000; "><br /></span><span style="color: #000000; ">};<br /><br /></span><span style="color: #0000FF; ">int</span><span style="color: #000000; "> main()<br />{<br />    S s1(</span><span style="color: #000000; ">2</span><span style="color: #000000; ">);<br />    S s2(s1);<br /><br /><br />    </span><span style="color: #0000FF; ">return</span><span style="color: #000000; "> </span><span style="color: #000000; ">0</span><span style="color: #000000; ">;<br />}<br /></span></div>褰撶粰s2鍒濆鍖栫殑鏃跺欒皟鐢ㄤ簡s2鐨勬嫹璐濇瀯閫犲嚱鏁幫紝鐢變簬鏄間紶閫掞紝緋葷粺浼氱粰褰㈠弬st閲嶆柊鐢寵涓孌電┖闂達紝鐒跺悗璋冪敤鑷韓鐨勬嫹璐濇瀯閫犲嚱鏁版妸s1鐨勬暟鎹垚鍛樼殑鍊間紶緇檚t銆傚綋璋冪敤鑷韓鐨勬嫹璐濇瀯閫犲嚱鏁扮殑鏃跺欏張鍥犱負鏄間紶閫掞紝鎵浠ャ傘傘?br />涔熷氨鏄錛屽彧瑕佽皟鐢ㄦ嫹璐濇瀯閫犲嚱鏁幫紝灝變細閲嶆柊鐢寵涓孌電┖闂達紝鍙閲嶆柊鐢寵涓孌電┖闂達紝灝變細璋冪敤鎷瘋礉鏋勯犲嚱鏁幫紝榪欐牱涓鐩翠笅鍘誨氨褰㈡垚浜嗕竴涓寰幆銆?br />鎵浠ユ嫹璐濇瀯閫犲嚱鏁頒竴瀹氫笉鑳芥槸鍊間紶閫掋?br /><br /><br /><br /><br /><br /><br /></div><img src ="http://www.shnenglu.com/cxiaojia/aggbug/160730.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/cxiaojia/" target="_blank">C灝忓姞</a> 2011-11-22 19:46 <a href="http://www.shnenglu.com/cxiaojia/archive/2011/11/22/cpp1.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>鐜頒唬C++椋庢牸鐨勬柊鍏冪礌http://www.shnenglu.com/cxiaojia/archive/2011/11/14/xdfg.htmlC灝忓姞C灝忓姞Mon, 14 Nov 2011 05:07:00 GMThttp://www.shnenglu.com/cxiaojia/archive/2011/11/14/xdfg.htmlhttp://www.shnenglu.com/cxiaojia/comments/160077.htmlhttp://www.shnenglu.com/cxiaojia/archive/2011/11/14/xdfg.html#Feedback0http://www.shnenglu.com/cxiaojia/comments/commentRss/160077.htmlhttp://www.shnenglu.com/cxiaojia/services/trackbacks/160077.html

“C++11灝卞儚涓闂ㄦ柊鐨勮璦銆?#8221; – Bjarne Stroustrup

C++11鏍囧噯鎺ㄥ嚭浜嗗緢澶氭湁鐢ㄧ殑鏂扮壒鎬с傛湰鏂囩壒鍒叧娉ㄧ浉姣擟++98鏇村儚鏄竴闂ㄦ柊璇█鐨勯偅閮ㄥ垎鐗規э紝鍥犱負錛?/p>

榪欎簺鐗規ф敼鍙樹簡緙栧啓C++紼嬪簭浣跨敤鐨勪唬鐮侀鏍煎拰涔犺[TODO]錛岄氬父涔熷寘鎷綘璁捐C++鍑芥暟搴撶殑鏂瑰紡銆備緥濡傦紝浣犱細鐪嬪埌鏇村鍙傛暟鍜岃繑鍥炲肩被鍨嬩負鏅鴻兘鎸囬拡(smart pointer)錛屽悓鏃朵篃浼氱湅鍒板嚱鏁伴氳繃鍊間紶閫掕繑鍥炲ぇ鍨嬪璞?/p>

浣犲皢浼氬彂鐜板湪澶у鏁扮殑浠g爜紺轟緥涓厖鏂ョ潃鏂扮壒鎬х殑韜獎銆備緥濡傦紝鍑犱箮姣?琛岀幇浠++浠g爜紺轟緥閮戒細浣跨敤鍒?strong>auto

C++11鐨勫叾浠栫壒鎬т篃寰堟銆備絾鏄鍏堢啛鎮変笅闈㈣繖浜涳紝姝f槸鍥犱負榪欎簺鐗規х殑騫挎硾浣跨敤浣垮緱C++11浠g爜濡傚悓鍏朵粬鐜頒唬涓繪祦璇█涓鏍鋒暣媧併佸畨鍏ㄥ拰楂樻晥錛屼笌姝ゅ悓鏃朵繚鎸佷簡C++浼犵粺鐨勬ц兘浼樺娍銆?/p>

鎻愮ず錛?/p>

  • 涓嶴trunk & White[TODO]涓鏍鳳紝鏈枃鍙仛姒傝鐨勬葷粨鎬ф寚瀵艱屼笉鍋氳灝藉熀鏈師鐞嗗拰浼樼己鐐瑰垎鏋愩傝緇嗗垎鏋愯鍙傝鍏朵粬鏂囩珷
  • 鏈枃浼氫笉鏂洿鏂幫紝涓昏鍙樻洿鍙婂唴瀹瑰鍔犺鍙傝鏂囨湯鍙樻洿璁板綍

auto

nullptr

濮嬬粓浣跨敤nullptr琛ㄧず涓涓猲ull鎸囬拡鍊鹼紝緇濅笉瑕佷嬌鐢ㄦ暟瀛?鎴栬匩ULL瀹忥紝鍥犱負瀹冧滑涔熷彲浠ヤ唬琛ㄤ竴涓暣鏁版垨鑰呮寚閽堜粠鑰屼駭鐢熸涔夈?/p>

Range for

鍩轟簬鑼冨洿鐨勫驚鐜嬌寰楁寜欏哄簭璁塊棶鍏朵腑鐨勬瘡涓厓绱犲彉寰楅潪甯告柟渚褲?/p>

鍩轟簬浠ヤ笅涓や釜鍘熷洜錛屽敖鍙兘浣跨敤auto錛氶鍏堬紝浣跨敤auto浼氶伩鍏嶉噸澶嶅0鏄庣紪璇戝櫒宸茬粡鐭ラ亾鐨勭被鍨嬨?span class="Apple-style-span" style="font-family: verdana, 'courier new'; font-size: 13px; line-height: 21px; "> 
 
  
// C++98
  map<int,string>::iterator i = m.begin ();

  
// C++11

  auto i 
= begin (m);

鍏舵錛屽綋浣跨敤鏈煡綾誨瀷鎴栬呯被鍨嬪悕縐頒笉鏄撶悊瑙f椂浣縜uto浼氭洿鍔犱究鍒╋紝渚嬪澶у鏁扮殑lambda鍑芥暟錛籘ODO錛?#8212;—浣犵敋鑷充笉鑳界畝鍗曠殑鎷煎啓鍑虹被鍨嬬殑鍚嶅瓧銆?/span>

 
// C++98
  binder2nd< greater<int> > x = bind2nd ( greater<int>()錛?nbsp;42 );

  
// C++11

  auto x 
= [](int i) { return i > 42; };

闇瑕佹敞鎰忥紝浣跨敤auto騫朵笉鏀瑰彉浠g爜鐨勫惈涔夈備唬鐮佷粛鐒舵槸闈欐佺被鍨嬶薊璇戞敞錛斤紝姣忎釜琛ㄨ揪寮忕殑綾誨瀷閮芥槸娓呮櫚鍜屾槑紜殑錛汣++11鍙槸涓嶉渶瑕佹垜浠噸澶嶅0鏄庣被鍨嬬殑鍚嶅瓧銆備竴浜涗漢鍒氬紑濮嬪彲鑳戒細瀹蟲曞湪榪欓噷浣跨敤auto錛屽洜涓烘劅瑙夊ソ鍍忔病鏈夛紙閲嶅錛夊0鏄庢垜浠渶瑕佺殑綾誨瀷灝辨剰鍛崇潃浼氱宸у緱鍒頒竴涓笉鍚岀殑綾誨瀷銆傚鏋滀綘鎯寵鏄庣‘鍦拌繘琛屼竴嬈?em>寮哄埗綾誨瀷杞崲錛屾病鏈夐棶棰橈紝澹版槑鐩爣綾誨瀷灝卞ソ浜嗐傜劧鑰屽ぇ澶氭暟鎯呭喌涓嬶紝鍙浣跨敤auto灝卞彲浠ヤ簡錛涘嚑涔庝笉浼氬嚭鐜伴敊璇湴鎷垮埌涓涓笉鍚岀被鍨嬬殑鎯呭喌錛屽嵆渚垮嚭鐜伴敊璇紝C++鐨勫己闈欐佺被鍨嬬郴緇熶篃浼氱敱緙栬瘧鍣ㄨ浣犵煡閬撹繖涓敊璇紝鍥犱負浣犳璇曞浘璁塊棶涓涓彉閲忔病鏈夌殑鎴愬憳鍑芥暟鎴栨槸閿欒鍦拌皟鐢ㄤ簡璇ュ嚱鏁般?/p>

璇戞敞錛氬姩鎬佺被鍨嬭璦錛坉ynamic typing language錛夋槸鎸囩被鍨嬫鏌ュ彂鐢熷湪榪愯鏈熼棿錛坮un-time錛夌殑璇█銆傞潤鎬佺被鍨嬭璦錛坰tatic typing language錛夋槸綾誨瀷媯鏌ュ彂鐢熷湪緙栬瘧鏈熼棿錛坈ompile-time錛夌殑璇█銆?/p>

鏅鴻兘鎸囬拡錛氭棤欏籨elete

璇峰緇堜嬌鐢ㄦ爣鍑嗘櫤鑳芥寚閽堜互鍙婇潪鍗犳湁鍘熷鎸囬拡(non-owning raw pointer)銆傜粷涓嶈浣跨敤鍗犳湁鍘熺敓鎸囬拡(owning raw pointer)鍜宒elete鎿嶄綔錛岄櫎闈炲湪瀹炵幇浣犺嚜宸辯殑搴曞眰鏁版嵁緇撴瀯榪欑灝戣鐨勬儏鍐典笅錛堝嵆浣垮湪姝ゆ椂涔熼渶瑕佸湪 class 鑼冨洿鍐呬繚鎸佸畬濂界殑灝佽錛夈傚鏋滃彧鑳藉鐭ラ亾浣犳槸鍙︿竴涓璞″敮涓鐨勬墍鏈夎咃紝璇蜂嬌鐢╱nique_ptr鏉ヨ〃紺哄敮涓鎵鏈夋潈錛圱ODO)銆備竴涓?#8221;new T”琛ㄨ揪寮忎細椹笂鍒濆鍖栧彟涓涓紩鐢ㄥ畠鐨勫璞★紝閫氬父鏄竴涓猽nique_ptr銆?br />



 
// C++11 Pimpl Idiom
  class widget {

  widget ();

  
~widget ();

  
private:

  
class impl;

  unique_ptr
<impl> pimpl;

  };

  
// in .cpp file

  
class impl {

  :::

  };

  widget::widget ()

  : pimpl ( 
new impl () )

  {

  }

  widget::
~widget () = default;
浣跨敤shared_ptr鏉ヨ〃紺哄叡浜墍鏈夋潈銆傛帹鑽愪嬌鐢╩ake_shared鏉ユ湁鏁堝湴鍒涘緩鍏變韓瀵硅薄銆?br />

 
// C++98
  widget* pw = new widget ();

  :::

  delete pw;

  
// C++11

  auto pw 
= make_shared<widget>();

浣跨敤 weak_ptr 鏉ラ鍑哄驚鐜茍涓旇〃紺哄彲閫夋э紙渚嬪錛屽疄鐜頒竴涓璞$紦瀛橈級

  
// C++11
  class gadget;

  
class widget {

  
private:

  shared_ptr
<gadget> g; // if shared ownership

  };

  
class gadget {

  
private:

  weak_ptr
<widget> w;

  };

濡傛灉浣犵煡閬撳彟涓涓璞″瓨鍦ㄦ椂闂翠細鏇撮暱涔呭茍涓斿笇鏈涜窡韙畠錛屼嬌鐢ㄤ竴涓紙闈炲崰鏈塶on-owning)鍘熷鎸囬拡銆?/span>

  
// C++11
  class node {

  vector
< unique_ptr<node> > children;

  node
* parent;

  
public:

  :::

  };

nullptr

濮嬬粓浣跨敤nullptr琛ㄧず涓涓猲ull鎸囬拡鍊鹼紝緇濅笉瑕佷嬌鐢ㄦ暟瀛?鎴栬匩ULL瀹忥紝鍥犱負瀹冧滑涔熷彲浠ヤ唬琛ㄤ竴涓暣鏁版垨鑰呮寚閽堜粠鑰屼駭鐢熸涔夈?/p>

Range for

鍩轟簬鑼冨洿鐨勫驚鐜嬌寰楁寜欏哄簭璁塊棶鍏朵腑鐨勬瘡涓厓绱犲彉寰楅潪甯告柟渚褲?br />


  
// C++98
  for( vector<double>::iterator i = v.begin (); i != v.end (); ++i ) {

  total 
+= *i;

  }

  
// C++11

  
for( auto d : v ) {

  total 
+= d;

  }

闈炴垚鍛橈紙nonmember錛?begin 鍜?end

濮嬬粓浣跨敤闈炴垚鍛榖egin鍜宔nd錛屽洜涓哄畠鏄彲鎵╁睍鐨勫茍涓斿彲浠ュ簲鐢ㄥ湪鎵鏈夌殑瀹瑰櫒綾誨瀷(container type)錛屼笉浠呬粎鏄伒寰簡STL椋庢牸鎻愪緵浜?.begin ()鍜?.end ()鎴愬憳鍑芥暟鐨勫鍣紝鐢氳嚦鏁扮粍閮藉彲浠ヤ嬌鐢ㄣ?/p>

濡傛灉浣犱嬌鐢ㄤ簡涓涓潪STL椋庢牸鐨刢ollection綾誨瀷錛岃櫧鐒舵彁渚涗簡榪唬浣嗘病鏈夋彁渚汼TL鐨?.begin ()鍜?.end ()錛岄氬父鍙互涓鴻繖涓被鍨嬬紪鍐欒嚜宸辯殑闈炴垚鍛榖egin鍜宔nd鏉ヨ繘琛岄噸杞姐傝繖鏍蜂綘灝卞彲浠ヤ嬌鐢⊿TL瀹瑰櫒鐨勭紪紼嬮鏍兼潵閬嶅巻璇ョ被鍨嬨侰++11鏍囧噯鎻愪緵浜嗙ず渚?C鏁扮粍灝辨槸榪欐牱涓涓被鍨嬶紝鏍囧噯鍚屾椂涓烘暟緇勬彁渚涗簡begin鍜宔nd銆?/p>


  vector
<int> v;
  
int a[100];

  
// C++98

  sort ( v.begin ()錛?nbsp;v.end () );

  sort ( 
&a[0], &a[0+ sizeof(a)/sizeof(a[0]) );

  
// C++11

  sort ( begin (v)錛?nbsp;end (v) );

  sort ( begin (a)錛?nbsp;end (a) );

Lambda 鍑芥暟鍜岀畻娉?/strong>

Lambda[TODO]鏄喅瀹氫咕鍧ょ殑鍥犵礌錛屽畠浼氫嬌浣犵紪鍐欑殑浠g爜鍙樺緱鏇翠紭闆呫佹洿蹇熴侺ambda浣垮緱STL綆楁硶鐨勫彲鐢ㄦф彁楂樹簡榪?00鍊嶃傛柊榪戝紑鍙戠殑C++鍑芥暟搴撻兘鏄熀浜巐ambda鍙互鐢ㄧ殑鍓嶆彁錛堜緥濡傦紝PPL錛夊茍涓旀湁浜涘嚱鏁板簱鐢氳嚦瑕佹眰浣犵紪鍐檒ambda鏉ヨ皟鐢ㄥ嚱鏁板簱錛堜緥濡傦紝C++ AMP錛?/p>

涓嬮潰鏄竴涓揩閫熺ず渚嬶細鎵懼埌v閲岄潰澶т簬x騫朵笖灝忎簬y鐨勭涓涓厓绱犮傚湪C++11涓紝鏈綆鍗曞拰騫插噣鐨勪唬鐮佸氨鏄皟鐢ㄤ竴涓爣鍑嗗嚱鏁般?br />


  
// C++98: write a naked loop (using std::find_if is impractically difficult)
  vector<int>::iterator i = v.begin (); // because we need to use i later

  
for( ; i != v.end (); ++i ) {

  
if*> x && *< y ) break;

  }

  
// C++11: use std::find_if

  auto i 
= find_if ( begin (v)錛?nbsp;end (v)錛?nbsp;[=](int i) { return i > x && i < y; } );

鎯寵浣跨敤C++緙栧啓涓涓驚鐜垨鑰呯被浼肩殑鏂扮壒鎬э紵涓嶇敤鐫鎬ワ紱鍙緙栧啓涓涓ā鏉垮嚱鏁幫紙template function)(鍑芥暟搴撶畻娉曪級錛屽茍涓?em>鍑犱箮鍙互灝唋ambda褰撳仛璇█鐗規ф潵浣跨敤錛屼笌姝ゅ悓鏃朵細鏇村姞鐏墊椿錛屽洜涓哄畠涓嶆槸鍥哄畾鐨勮璦鐗規ц屾槸涓涓湡姝g殑鍑芥暟搴撱?/span>

  
// C#
  lock( mut_x ) {

   use x 

  }

  
// 涓嶄嬌鐢?nbsp;lambda 鐨凜++11錛氬凡緇忛潪甯哥畝媧佸茍涓旀洿鐏墊椿錛堜緥濡傦紝鍙互浣跨敤瓚呮椂浠ュ強鍏朵粬閫夐」錛?/span>

  {

  lock_guard
<mutex> hold ( mut_x );

   use x 

  }

  
// C++11 with lambdas, and a helper algorithm: C# syntax in C++

  
// 浣跨敤浜?nbsp;lambda 鐨凜++11鍙互甯︿竴涓緟鍔╃畻娉曪細鍦?nbsp;C++ 涓嬌鐢?nbsp;C# 鐨勬枃娉?br />
  
// Algorithm: template<typename T, typename F> void lock ( T& t, F f ) { lock_guard<T> hold (t); f (); }

  
lock( mut_x錛?nbsp;[&]{

   use x 

  });

鍘葷啛鎮塴ambda鍚с備綘浼氬ぇ閲忎嬌鐢ㄥ畠錛屼笉浠呬粎鍦–++涓?#8212;—瀹冨凡緇忓箍娉涘簲鐢ㄤ簬寰堝涓繪祦鐨勭紪紼嬭璦銆備竴涓紑濮嬬殑濂藉幓澶勮鍙傝冩垜鍦≒DC2010鐨勬紨璁層婃棤澶勪笉鍦ㄧ殑 lambda銆?br />

Move / &&

Move琚涓烘槸copy鐨勬渶浣充紭鍖栵紝灝界瀹冧篃浣垮緱鍏朵粬浜嬫儏鎴愪負鍙兘姣斿淇℃伅琚漿鍙戙?/p>



// C++98錛氶伩鍏?nbsp;copy 鐨勬浛浠f柟娉?/span>
  vector<int>* make_big_vector (); // 閫夋嫨1: 榪斿洖鎸囬拡: 娌℃湁鎷瘋礉錛屼絾涓嶈蹇樿 delete

  :::

  vector
<int>* result = make_big_vector ();

  
void make_big_vector ( vector<int>& out ); // 閫夋嫨2: 閫氳繃寮曠敤浼犻? 娌℃湁鎷瘋礉錛屼絾鏄皟鐢ㄨ呴渶瑕佷紶鍏ヤ竴涓湁鍚嶅璞?/span>

  :::

  vector
<int> result;

  make_big_vector ( result );

  
// C++11: move

  vector
<int> make_big_vector (); // 閫氬父瀵逛簬”琚皟鐢ㄨ?callee)鍒嗛厤鐨勭┖闂?#8220;涔熼傜敤

  :::

  vector
<int> result = make_big_vector ();

Move璇硶鏀瑰彉浜嗘垜浠璁PI鐨勬柟寮忋傛垜浠彲浠ユ洿澶氬湴璁捐閫氳繃鍊間紶閫掋備負浣犵殑綾誨瀷鍚敤move璇硶錛屼嬌鐢ㄦ椂浼氭瘮copy鏇存湁鏁堛?/p>

鏇村鍙樺寲

榪樻湁鏇村鐜頒唬C++鐨勭壒鎬с傚茍涓旀垜璁″垝鍦ㄦ湭鏉ョ紪鍐欐洿澶氭繁鍏++11鏂扮壒鎬т互鍙婂叾浠栫壒鎬х殑鐭枃錛屾垜浠細鐭ラ亾鏇村騫朵笖鍠滄涓婂畠銆?/p>

浣嗙洰鍓嶏紝榪欐槸蹇呴』鐭ラ亾鐨勬柊鐗規с傝繖浜涚壒鎬х粍鎴愪簡鐜頒唬C++椋庢牸鐨勬牳蹇冿紝浣垮緱C++浠g爜鐪嬭搗鏉ュ拰鎵ц鏃跺儚浠栦滑璁捐鐨勯偅鏍鳳紝浣犲皢浼氱湅鍒拌繖浜涚壒鎬т細鍑虹幇鍦ㄥ嚑涔庢瘡涓孌典綘鐪嬪埌鎴栬呯紪鍐欑殑鐜頒唬C++浠g爜涓傚茍涓斿畠浠嬌寰楃幇浠++鏇村姞騫插噣銆佸畨鍏ㄤ笖蹇燂紝浣垮緱C++鍦ㄦ湭鏉ョ殑鑻ュ共騫翠粛鐒舵槸鎴戜滑浜т笟鐨勪緷闈犮?/p>

涓昏鍙樻洿

2011-10-30:涓篖ambda澧炲姞C#lock紺轟緥銆傞噸鏂扮粍緇囨櫤鑳芥寚閽堥鍏堜粙緇島nique_prt銆?/p>

鏂囩珷鍑鴻嚜錛?a target="_blank" style="color: #015fb6; text-decoration: none; ">浼箰鍦ㄧ嚎







 



C灝忓姞 2011-11-14 13:07 鍙戣〃璇勮
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