锘??xml version="1.0" encoding="utf-8" standalone="yes"?>久久亚洲欧美日本精品,国产精品9999久久久久,2022年国产精品久久久久 http://www.shnenglu.com/softko/category/14120.html娣¤杽鍚嶅埄,淇韓鍏繪?/description>zh-cnMon, 25 Feb 2013 23:50:57 GMTMon, 25 Feb 2013 23:50:57 GMT60鏁扮粍涓庢寚閽堢殑鍖哄埆 http://www.shnenglu.com/softko/archive/2013/02/19/197934.htmleircQeircQTue, 19 Feb 2013 05:33:00 GMThttp://www.shnenglu.com/softko/archive/2013/02/19/197934.htmlhttp://www.shnenglu.com/softko/comments/197934.htmlhttp://www.shnenglu.com/softko/archive/2013/02/19/197934.html#Feedback0http://www.shnenglu.com/softko/comments/commentRss/197934.htmlhttp://www.shnenglu.com/softko/services/trackbacks/197934.html

C璇█涓浜庝笅闈㈢殑涓ょ鎯呭喌錛屾槸鍚︾浉鍚屽憿錛?/p>

char a[] = "abcdefg"錛?--------------1

char *p = "abcdefg";-----------------2

鍦ㄨ皥鍒拌繖浜涘尯鍒椂錛屽簲璇ュ厛璋堜竴涓嬭綆楁満涓鍙橀噺鏄浣曞瓨鍌ㄧ殑銆備粠緙栬瘧鍘熺悊涓垜浠煡閬擄紝瀵逛簬鎵鏈夌殑鍙橀噺浠栭兘浼氬獎灝勫埌涓涓鍙瘋〃涓備負浜嗙畝鍖栵紝榪欓噷緇欏嚭涓縐嶆渶綆鍗曠殑渚夸簬鐞嗚В鐨勭鍙瘋〃錛?/p>

a

0xffaa

p

0xffcc

琛? 涓涓畝鍗曠殑絎﹀彿琛ㄧず渚?/p>

浠ヤ笂琛ㄦ牸涓璦浠h〃涓涓彉閲忥紝0xffaa鍒欎負鍙橀噺a鐨勫唴瀹圭殑瀛樺偍鍦板潃錛沺浠h〃鍙︿竴涓彉閲忥紝0xffcc涓哄彉閲弍鐨勫唴瀹圭殑瀛樺偍鍦板潃銆傚浜庢暟緇勫瀷鐨勫彉閲忓拰鎸囬拡鍨嬬殑鍙橀噺錛屽叾鍦板潃浠h〃鐨勫惈涔変笉鍚屻?/p>

瀵逛簬鏁扮粍a:

榪欎釜0xffaa鍦板潃灝辨槸鍏跺瓨鏀炬暟緇勫唴瀹圭殑棣栧湴鍧浜嗐傚浜巃[i]鐨勫紩鐢ㄦ楠ゅ涓嬶細

姝ラ涓銆佸彇鍑篿鐨勫鹼紝灝嗕粬涓?xffaa鐩稿姞錛?/p>

姝ラ浜屻佸彇鍑轟負(0xffaa+i)涓殑鍐呭銆?/p>

瀵逛簬鎸囬拡p:

榪欎釜0xffcc鍦板潃灝辨槸涓瓨鏀劇殑涓嶆槸瀛楃涓茬殑鍐呭錛岃屾槸涓涓湴鍧錛岃繖涓湴鍧鎵嶆槸瀛楃涓茬殑棣栧湴鍧錛屽p[i]鎴栬呯敤鎸囬拡琛ㄧず*(p+i)鐨勫簲鐢ㄦ楠ゅ涓嬶細

姝ラ涓銆佸彇鍑?xffcc鍦板潃涓殑鍐呭錛屼緥濡備負0xffdf;

姝ラ浜屻佸彇鍑哄湴鍧0xffdf涓殑鍐呭銆?/p>

鏁扮粍鍜屾寚閽堢殑瀵規瘮濡備笅鍥撅細

涓嬮潰鏄湪VC6.0涓嬩綔鐨勪竴涓瘯楠岋紝閫氳繃榪欎釜璇曢獙澶у鍙互鐪嬪埌錛岃櫧鐒跺悓榪嘯]鍜岄氳繃*寮曠敤閮戒竴鏍鳳紝浣嗗湪鍐呴儴澶勭悊鐨勬柟娉曟槸涓嶄竴鏍風殑銆?/p>

#include "stdafx.h"

#include "stdio.h"

int main(int argc, char* argv[])

{

     int a[3]={1,2,3};

     int *p =a;

     printf("a:%d,&a:%d,a[0]:%d,*a:%d,p:%d,&p:%d,*p:%d,p[0]:%d",a,&a,

a[0],*a,p,&p,*p,p[0]);

     return 0;

}

杈撳嚭緇撴灉錛?/p>

a:1310580,&a:1310580,a[0]:1,*a:1,p:1310580,&p:1310576,*p:1,p[0]:1銆?/p>

鐢變笂闈㈢殑鍒嗘瀽鍙煡錛屽鏋滃湪涓涓枃浠朵腑瀹氫箟浜嗕竴涓暟緇刬nt maychar[100],閭d箞涓嬮潰鐨勫0鏄庡氨鏄畬鍏ㄩ敊璇殑銆?/p>

extern int *maychar;

榪欐牱鐨勮瘽錛屽湪寮曠敤鏃朵粬灝變細鎸夌収鎸囬拡鐨勬柟娉曟潵寮曠敤鏁扮粍銆傛紜殑澹版槑搴旇鏄痚xter int maychar[];榪欓噷鏁扮粍鐨勫ぇ灝忓茍涓嶉噸瑕併備笅闈㈠皢鎸囬拡涓庢暟緇勭殑鍖哄埆鐢ㄨ〃鏍肩殑褰㈠紡鍒楀嚭濡備笅錛?/p>

鎸囬拡

鏁扮粍

淇濆瓨鏁版嵁鐨勫湴鍧

淇濆瓨鏁版嵁

闂存帴璁塊棶鏁版嵁

鐩存帴璁塊棶

閫氬父鐢ㄤ簬鍔ㄦ佹暟鎹粨鏋?/p>

閫氬父鐢ㄤ簬瀛樺偍鍥哄畾鏁扮洰鏁版嵁綾誨瀷鐩稿悓鐨勫厓绱?/p>

鐩稿叧鎿嶄綔malloc(),free()絳?/p>

闅愬紡鍒嗛厤鍜屽垹闄?/p>

鍚屽父鎸囧悜鍖垮悕鏁版嵁

鑷韓鍗充負鏁版嵁鍚?/p>

琛? 鎸囬拡涓庢暟緇勭殑鍖哄埆

榪樿鎻愰啋涓鐐圭殑灝辨槸錛?/p>

char a[] = "abcdefg"錛?--------------鏁扮粍鍐呭鑳戒慨鏀?瀛楃鏁扮粍)

char *p = "abcdefg";-----------------鍐呭涓嶈兘淇敼錛堝瓧絎︿覆甯擱噺錛?/p>

鍦ˋNSI C涓紝鍒濆鍖栨寚閽堟槸鎵鍒涘緩鐨勫瓧絎︿覆鏃跺父閲忥紝琚畾涔変負鍙錛屽鏋滆瘯鍥鵑氳繃鎸囬拡淇敼榪欎釜瀛楃涓茬殑鍊鹼紝紼嬪簭灝變細鍑虹幇涓哄畾涔夌殑琛屼負銆?/p>

eircQ 2013-02-19 13:33 鍙戣〃璇勮
]]>
C璇█瀛楄妭瀵歸綈璇﹁В(杞?http://www.shnenglu.com/softko/archive/2010/09/17/126825.htmleircQeircQFri, 17 Sep 2010 01:49:00 GMThttp://www.shnenglu.com/softko/archive/2010/09/17/126825.htmlhttp://www.shnenglu.com/softko/comments/126825.htmlhttp://www.shnenglu.com/softko/archive/2010/09/17/126825.html#Feedback0http://www.shnenglu.com/softko/comments/commentRss/126825.htmlhttp://www.shnenglu.com/softko/services/trackbacks/126825.html涓銆? 浠涔堟槸瀵歸綈錛屼互鍙婁負浠涔堣瀵歸綈錛?/font>
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鐢變簬鍚勪釜騫沖彴鍜岀紪璇戝櫒鐨勪笉鍚岋紝鐜頒互鏈漢浣跨敤鐨刧cc version 3.2.2緙栬瘧鍣紙32浣峹86騫沖彴錛変負渚嬪瓙錛屾潵璁ㄨ緙栬瘧鍣ㄥstruct鏁版嵁緇撴瀯涓殑鍚勬垚鍛樺浣曡繘琛屽榻愮殑銆?br> 璁劇粨鏋勪綋濡備笅瀹氫箟錛?br> struct A {
    int a;
    char b;
    short c;
};
緇撴瀯浣揂涓寘鍚簡4瀛楄妭闀垮害鐨刬nt涓涓紝1瀛楄妭闀垮害鐨刢har涓涓拰2瀛楄妭闀垮害鐨剆hort鍨嬫暟鎹竴涓傛墍浠鐢ㄥ埌鐨勭┖闂村簲璇ユ槸7瀛楄妭銆備絾鏄洜涓虹紪璇戝櫒 瑕佸鏁版嵁鎴愬憳鍦ㄧ┖闂翠笂榪涜瀵歸綈銆?br> 鎵浠ヤ嬌鐢╯izeof(strcut A)鍊間負8銆?br> 鐜板湪鎶婅緇撴瀯浣撹皟鏁存垚鍛樺彉閲忕殑欏哄簭銆?br> struct B {
    char b;
    int a;
    short c;
};
榪欐椂鍊欏悓鏍鋒槸鎬誨叡7涓瓧鑺傜殑鍙橀噺錛屼絾鏄痵izeof(struct B)鐨勫煎嵈鏄?2銆?br> 涓嬮潰鎴戜滑浣跨敤棰勭紪璇戞寚浠?pragma pack (value)鏉ュ憡璇夌紪璇戝櫒錛屼嬌鐢ㄦ垜浠寚瀹氱殑瀵歸綈鍊兼潵鍙栦唬緙虹渷鐨勩?br> #pragma pack (2) /*鎸囧畾鎸?瀛楄妭瀵歸綈*/
struct C {
    char b;
    int a;
    short c;
};
#pragma pack () /*鍙栨秷鎸囧畾瀵歸綈錛屾仮澶嶇己鐪佸榻?/
sizeof(struct C)鍊兼槸8銆?br>
淇敼瀵歸綈鍊間負1錛?br> #pragma pack (1) /*鎸囧畾鎸?瀛楄妭瀵歸綈*/
struct D {
    char b;
    int a;
    short c;
};
#pragma pack () /*鍙栨秷鎸囧畾瀵歸綈錛屾仮澶嶇己鐪佸榻?/
sizeof(struct D)鍊間負7銆?br>
瀵逛簬char鍨嬫暟鎹紝鍏惰嚜韜榻愬間負1錛屽浜巗hort鍨嬩負2錛屽浜巌nt,float,double綾誨瀷錛屽叾鑷韓瀵歸綈鍊間負4錛屽崟浣嶅瓧鑺傘?br> 榪欓噷闈㈡湁鍥涗釜姒傚康鍊鹼細
1)鏁版嵁綾誨瀷鑷韓鐨勫榻愬鹼細灝辨槸涓婇潰浜や唬鐨勫熀鏈暟鎹被鍨嬬殑鑷韓瀵歸綈鍊箋?br> 2)鎸囧畾瀵歸綈鍊鹼細#pragma pack (value)鏃剁殑鎸囧畾瀵歸綈鍊紇alue銆?br> 3)緇撴瀯浣撴垨鑰呯被鐨勮嚜韜榻愬鹼細鍏舵垚鍛樹腑鑷韓瀵歸綈鍊兼渶澶х殑閭d釜鍊箋?br> 4)鏁版嵁鎴愬憳銆佺粨鏋勪綋鍜岀被鐨勬湁鏁堝榻愬鹼細鑷韓瀵歸綈鍊煎拰鎸囧畾瀵歸綈鍊間腑杈冨皬鐨勯偅涓箋?br> 鏈変簡榪欎簺鍊鹼紝鎴戜滑灝卞彲浠ュ緢鏂逛究鐨勬潵璁ㄨ鍏蜂綋鏁版嵁緇撴瀯鐨勬垚鍛樺拰鍏惰嚜韜殑瀵歸綈鏂瑰紡銆傛湁鏁堝榻愬糔鏄渶緇堢敤鏉ュ喅瀹氭暟鎹瓨鏀懼湴鍧鏂瑰紡鐨勫鹼紝鏈閲嶈銆傛湁鏁堝榻怤錛屽氨 鏄〃紺?#8220;瀵歸綈鍦∟涓?#8221;錛屼篃灝辨槸璇磋鏁版嵁鐨?瀛樻斁璧峰鍦板潃%N=0".鑰屾暟鎹粨鏋勪腑鐨勬暟鎹彉閲忛兘鏄寜瀹氫箟鐨勫厛鍚庨『搴忔潵鎺掓斁鐨勩傜涓涓暟鎹彉閲忕殑璧峰鍦板潃灝辨槸 鏁版嵁緇撴瀯鐨勮搗濮嬪湴鍧銆傜粨鏋勪綋鐨勬垚鍛樺彉閲忚瀵歸綈鎺掓斁錛岀粨鏋勪綋鏈韓涔熻鏍規嵁鑷韓鐨勬湁鏁堝榻愬煎渾鏁?灝辨槸緇撴瀯浣撴垚鍛樺彉閲忓崰鐢ㄦ婚暱搴﹂渶瑕佹槸瀵圭粨鏋勪綋鏈夋晥瀵歸綈鍊肩殑鏁? 鏁板嶏紝緇撳悎涓嬮潰渚嬪瓙鐞嗚В)銆傝繖鏍峰氨涓嶉毦鐞嗚В涓婇潰鐨勫嚑涓緥瀛愮殑鍊間簡銆?br> 渚嬪瓙鍒嗘瀽錛?br> 鍒嗘瀽渚嬪瓙B錛?br> struct B {
    char b;
    int a;
    short c;
};
鍋囪B浠庡湴鍧絀洪棿0x0000寮濮嬫帓鏀俱傝渚嬪瓙涓病鏈夊畾涔夋寚瀹氬榻愬鹼紝鍦ㄧ瑪鑰呯幆澧冧笅錛岃鍊奸粯璁や負4銆傜涓涓垚鍛樺彉閲廱鐨勮嚜韜榻愬兼槸1錛屾瘮鎸囧畾鎴栬呴粯璁ゆ寚 瀹氬榻愬?灝忥紝鎵浠ュ叾鏈夋晥瀵歸綈鍊間負1錛屾墍浠ュ叾瀛樻斁鍦板潃0x0000絎﹀悎0x0000%1=0.絎簩涓垚鍛樺彉閲廰錛屽叾鑷韓瀵歸綈鍊間負4錛屾墍浠ユ湁鏁堝榻愬間篃涓? 4錛屾墍浠ュ彧鑳藉瓨鏀懼湪璧峰鍦板潃涓?x0004鍒?x0007榪欏洓涓繛緇殑瀛楄妭絀洪棿涓紝澶嶆牳0x0004%4=0,涓旂揣闈犵涓涓彉閲忋傜涓変釜鍙橀噺c,鑷韓瀵歸綈 鍊間負2錛屾墍浠ユ湁鏁堝榻愬間篃鏄?錛屽彲浠ュ瓨鏀懼湪0x0008鍒?x0009榪欎袱涓瓧鑺傜┖闂翠腑錛岀鍚?x0008%2=0銆傛墍浠ヤ粠0x0000鍒?x0009瀛? 鏀劇殑閮芥槸B鍐呭銆傚啀鐪嬫暟鎹粨鏋凚鐨勮嚜韜榻愬間負鍏跺彉閲忎腑鏈澶у榻愬?榪欓噷鏄痓錛夋墍浠ュ氨鏄?錛屾墍浠ョ粨鏋勪綋鐨勬湁鏁堝榻愬間篃鏄?銆傛牴鎹粨鏋勪綋鍦嗘暣鐨勮姹傦紝 0x0009鍒?x0000=10瀛楄妭錛岋紙10錛?錛夛紖4錛?銆傛墍浠?x0000A鍒?x000B涔熶負緇撴瀯浣揃鎵鍗犵敤銆傛晠B浠?x0000鍒?x000B 鍏辨湁12涓瓧鑺?sizeof(struct B)=12;

鍚岀悊,鍒嗘瀽涓婇潰渚嬪瓙C錛?br> #pragma pack (2) /*鎸囧畾鎸?瀛楄妭瀵歸綈*/
struct C {
    char b;
    int a;
    short c;
};
#pragma pack () /*鍙栨秷鎸囧畾瀵歸綈錛屾仮澶嶇己鐪佸榻?/
絎竴涓彉閲廱鐨勮嚜韜榻愬間負1錛屾寚瀹氬榻愬間負2錛屾墍浠ワ紝鍏舵湁鏁堝榻愬間負1錛屽亣璁綜浠?x0000寮濮嬶紝閭d箞b瀛樻斁鍦?x0000錛岀鍚?x0000%1= 0;絎簩涓彉閲忥紝鑷韓瀵歸綈鍊間負4錛屾寚瀹氬榻愬間負2錛屾墍浠ユ湁鏁堝榻愬間負2錛屾墍浠ラ『搴忓瓨鏀懼湪0x0002銆?x0003銆?x0004銆?x0005鍥涗釜榪炵畫 瀛楄妭涓紝絎﹀悎0x0002%2=0銆傜涓変釜鍙橀噺c鐨勮嚜韜榻愬間負2錛屾墍浠ユ湁鏁堝榻愬間負2錛岄『搴忓瓨鏀?br> 鍦?x0006銆?x0007涓紝絎﹀悎0x0006%2=0銆傛墍浠ヤ粠0x0000鍒?x00007鍏卞叓瀛楄妭瀛樻斁鐨勬槸C鐨勫彉閲忋傚張C鐨勮嚜韜榻愬間負4錛屾墍浠? C鐨勬湁鏁堝榻愬間負2銆傚張8%2=0,C鍙崰鐢?x0000鍒?x0007鐨勫叓涓瓧鑺傘傛墍浠izeof(struct C)=8.

鏈? 浜嗕互涓婄殑瑙i噴錛岀浉淇′綘瀵笴璇█鐨勫瓧鑺傚榻愭蹇靛簲璇ユ湁浜嗘竻妤氱殑璁よ瘑浜嗗惂銆傚湪緗戠粶紼嬪簭涓紝鎺屾彙榪欎釜姒傚康鍙槸寰堥噸瑕佺殑鍠旓紝鍦ㄤ笉鍚屽鉤鍙頒箣闂達紙姣斿鍦╓indows 鍜孡inux涔嬮棿錛変紶閫?榪涘埗嫻侊紙姣斿緇撴瀯浣擄級錛岄偅涔堝湪榪欎袱涓鉤鍙伴棿蹇呴』瑕佸畾涔夌浉鍚岀殑瀵歸綈鏂瑰紡錛屼笉鐒惰帿鍚嶅叾濡欑殑鍑轟簡涓浜涢敊錛屽彲鏄緢闅炬帓鏌ョ殑鍝_^銆?/font>

eircQ 2010-09-17 09:49 鍙戣〃璇勮
]]>
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