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http://www.shnenglu.com/yg2362/category/19797.htmlzh-cnSun, 23 Sep 2012 21:25:47 GMTSun, 23 Sep 2012 21:25:47 GMT60- Unicode鍜孶TF-8鐨勫尯鍒?/title>http://www.shnenglu.com/yg2362/archive/2012/09/23/191746.html姊ㄦ爲闃沖厜姊ㄦ爲闃沖厜Sun, 23 Sep 2012 14:56:00 GMThttp://www.shnenglu.com/yg2362/archive/2012/09/23/191746.htmlhttp://www.shnenglu.com/yg2362/comments/191746.htmlhttp://www.shnenglu.com/yg2362/archive/2012/09/23/191746.html#Feedback0http://www.shnenglu.com/yg2362/comments/commentRss/191746.htmlhttp://www.shnenglu.com/yg2362/services/trackbacks/191746.html棣栧厛鏄庣‘涓鐐癸紝UTF-8鏄疷NICODE涓縐嶅疄鐜版柟寮忋?br />UNICODE錛氫唬琛ㄤ竴縐嶇鍙烽泦鍚堬紝瀹冭瀹氫簡涓縐嶇鍚堢殑浜岃繘鍒惰〃紺猴紝娌℃湁鎸囨槑瀛樺偍鏂瑰紡銆?http://www.unicode.org/)
UTF-8:瀹炵幇浜哢NICODE錛屼嬌鐢ㄥ瀛楄妭鐨勫瓨鍌ㄦ柟寮忋?br />鎴戜滑鍏堟潵鑰冭檻鍑犱釜闂銆?br />絎竴錛屽鏋滀嬌鐢ㄥ崟瀛楄妭琛ㄧず絎﹀彿錛屽緢鏄庢樉錛屽畬鍏ㄤ笉澶熺敤
絎簩錛屽鏋滀嬌鐢ㄥ瀛楄妭琛ㄧず絎﹀彿錛岄偅涔堬紝鏈哄櫒鍦ㄨ鍙栫殑鏃跺欙紝瀹冩庝箞鐭ラ亾3涓瓧鑺傝〃紺轟竴涓鍙鳳紝榪樻槸琛ㄧず3涓鍙?br />絎笁錛屽鏋滀嬌鐢?涓瓧鑺傝〃紺轟竴涓鍙鳳紝棣栧厛錛屾渶澶氳兘琛ㄧず65535涓瓧絎﹁繕鏄細涓嶅鐢紝灝辯畻澶熺敤錛屾瘮濡侫SCII鐮佽繖綾諱粎闇1涓瓧鑺傚氨鍙互琛ㄧず鐨勭鍙鳳紝鐢?涓瓧鑺傝〃紺猴紝嫻垂絀洪棿浜嗐?br />鍥犳錛孶TF-8瀛曡偛鑰岀敓銆?br />棣栧厛UTF-8浣跨敤鍙橀暱琛ㄧず絎﹀彿錛岀畝鍗曠殑璇達紝鏈夌殑鏃跺欑敤1涓瓧鑺傝〃紺虹鍙鳳紝鏈夌殑鏃跺欑敤2涓瓧鑺傝〃紺虹鍙鳳紝榪欐牱瑙e喅浜嗘氮璐圭┖闂寸殑闂銆傞偅涔堬紝濡備綍瑙e喅絎簩涓棶棰樼殑鍛紝鎴戜滑寰椾簡瑙d笅UFT-8鐨勭紪鐮佽鍒欍?br />1.瀵逛簬鍗曞瓧鑺傜殑絎﹀彿錛屽瓧鑺傜涓涓負0錛屽悗闈?涓轟負榪欎釜絎﹀彿鐨剈nicode鐮?br />2.瀵逛簬N瀛楄妭鐨勭鍙?N>1),絎竴涓瓧鑺傚墠N浣嶄負1錛岀N+1浣嶄負0錛屽悗闈㈠瓧鑺傜殑鍓嶄袱浣嶈涓?0,鍓╀笅鍙紪鐮佺殑浣嶏紝涓鴻絎﹀彿鐨刄NICODE緙栫爜銆?br />榪欓噷鎴戜粠緗戜笂鎵句簡涓鍓浘
Unicode絎﹀彿鑼冨洿 | UTF-8緙栫爜鏂瑰紡
(鍗佸叚榪涘埗) | 錛堜簩榪涘埗錛?/span>
0000 0000-0000 007F | 0xxxxxxx
0000 0080-0000 07FF | 110xxxxx 10xxxxxx
0000 0800-0000 FFFF | 1110xxxx 10xxxxxx 10xxxxxx
0001 0000-0010 FFFF | 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
涓嬮潰鎴戝叿浣撹В閲婁笅榪欏箙鍥俱?br />棣栧厛鐪嬬涓琛岋紝瀹冪殑鎰忔濇槸00000000鍒?000007F鐨刄NICODE緙栫爜錛屽搴旂殑UTF-8鐨勭紪鐮佹柟寮忎負0XXXXXXX(X琛ㄧず鍙紪鐮佷綅錛屼笉瓚崇殑琛?)銆?br />絎簩琛岃〃紺?0000080鍒?00007FF鐨刄NICODE緙栫爜錛屽搴旂殑UTF-8鐨勭紪鐮佹柟寮忎負110XXXXX 10XXXXXX銆備互姝ょ被鎺?br />閭d箞錛岄棶棰樻槸錛岃繖涓寖鍥存槸鎬庝箞瀹氱殑錛?br />寰堢畝鍗曪紝鎴戜滑榪樻槸浠庣涓琛岃璧楓?07F錛屽疄闄呮湁鏁堜綅鍙湁7浣嶏紝鎵浠ワ紝0xxxxxxx灝辮凍鐭c備絾鏄?800寮濮嬶紝鏈夋晥浣嶈嚦灝戜負8浣嶏紝鎴戜滑寰楀鍔犱竴涓瓧鑺傦紝鎸夌収UTF-8鐨勮瀹氾紝2瀛楄妭鐨勮〃紺烘柟寮忎負110XXXXX 10XXXXXX錛屾垜浠殑緙栫爜浣嶄負11浣?X鐨勪釜鏁?錛屾墍浠ワ紝鎴戜滑鏈澶氬彲浠ヨ〃紺篣NICODE緙栫爜浣?1浣嶇殑瀛楃錛屼篃灝辨槸07FF銆?7FF榪囦簡灝辨槸0800錛屾湁鏁堜綅鑷沖皯涓?2浣嶏紝鎴戜滑寰楃敤3瀛楄妭鏉ヨ〃紺猴紝鎸夌収UTF-8鐨勮瀹氾紝1110XXXX 10XXXXXX 10XXXXXX錛屾渶澶х紪鐮佷綅涓?6浣嶏紝涔熷氨鏄疐FFF錛屾渶鍚庝竴琛屾垜灝變笉鍐嶈В閲婁簡銆?br />閫氳繃涓婇潰榪欎釜榪囩▼鎴戜滑浜嗚В浜嗭紝UNICODE杞琔TF-8鐨勮繃紼嬶紝褰撶劧錛岄嗚繃鏉ュ氨鏄疷TF-8杞崲鎴怳NICODE銆?br />鎴戜滑閫氳繃涓涓緥瀛愭潵婕旂ず涓婇潰鐨勮繃紼嬨傛眽瀛?#8220;鏉?#8221;錛孶NICODE鐨勭紪鐮佷綅0x6768錛屼簩榪涘埗褰㈠紡涓?110011101101000錛屾牴鎹笂闈㈢殑鍥撅紝鎴戜滑鐭ラ亾瀹冨睘浜庣涓夎錛屽洜姝わ紝瀹冨簲璇ユ斁鍏?110XXXX 10XXXXXX 10XXXXXX鐨勬ā鏉夸腑錛岀粨鏋滄槸11100110 10011101 10101000錛屽崄鍏繘鍒惰〃紺轟負E69DA8銆?br />鍙﹀璁捐緙栫爜闂錛屾垜浠粫涓嶅紑鍙︿竴涓棶棰橈紝灝辨槸澶х灝忕鐨勯棶棰橈紝涓嶈繃榪欎釜闂錛岀綉涓婅祫鏂欏緢澶氾紝涔熷緢濂藉疄璺碉紝榪欓噷鎴戝氨涓嶅鍟板棪浜嗐?img src ="http://www.shnenglu.com/yg2362/aggbug/191746.html" width = "1" height = "1" />
]]> - C++澶嶄範絎旇---嫻呰皥鎷瘋礉鏋勯犲嚱鏁板拰璧嬪兼瀯閫犲嚱鏁?/title>http://www.shnenglu.com/yg2362/archive/2012/08/31/188919.html姊ㄦ爲闃沖厜姊ㄦ爲闃沖厜Fri, 31 Aug 2012 09:13:00 GMThttp://www.shnenglu.com/yg2362/archive/2012/08/31/188919.htmlhttp://www.shnenglu.com/yg2362/comments/188919.htmlhttp://www.shnenglu.com/yg2362/archive/2012/08/31/188919.html#Feedback0http://www.shnenglu.com/yg2362/comments/commentRss/188919.htmlhttp://www.shnenglu.com/yg2362/services/trackbacks/188919.html1.鎷瘋礉鏋勯犲嚱鏁扮殑褰㈠紡
瀵逛簬綾?/span>X錛屽鏋滃畠鐨勫嚱鏁板艦寮忓涓?/span>
a) X&
b) const X&
c) volatile X&
d) const volatile X&
涓旀病鏈夊叾浠栧弬鏁版垨鍏朵粬鍙傛暟閮芥湁榛樿鍊?/span>,閭d箞榪欎釜鍑芥暟鏄嫹璐濇瀯閫犲嚱鏁?/span>
X::X(const X&);鏄嫹璐濇瀯閫犲嚱鏁?/span>
X::X(const X&,int val = 10);鏄嫹璐濇瀯閫犲嚱鏁?/span>
2.涓涓被涓彲浠ュ瓨鍦ㄨ秴榪囦竴涓嫹璐濇瀯閫犲嚱鏁?/span>
class X {
public:
X(const X&);
X(X&); // OK
};
緙栬瘧鍣ㄦ牴鎹疄闄呮儏鍐佃皟鐢?/span>const鎷瘋礉鏋勯犲嚱鏁版垨闈?/span>const鐨勬嫹璐濇瀯閫犲嚱鏁?/span>
3.榛樿鐨勬嫹璐濇瀯閫犲嚱鏁拌涓?/span>
a)鍏堣皟鐢ㄧ埗綾葷殑鎷瘋礉鏋勯犲嚱鏁?/span>
b)濡傛灉鏁版嵁鎴愬憳涓轟竴涓被鐨勫疄渚嬶紝鍒欒皟鐢ㄨ綾葷殑鎷瘋礉鏋勯犲嚱鏁?/span>
c)鍏朵粬鎴愬憳鎸変綅鎷瘋礉
4.榛樿鐨勮祴鍊兼瀯閫犲嚱鏁拌涓?/span>
a)鍏堣皟鐢ㄧ埗綾葷殑璧嬪兼瀯閫犲嚱鏁?/span>
b)濡傛灉鏁版嵁鎴愬憳涓轟竴涓被鐨勫疄渚嬶紝鍒欒皟鐢ㄨ綾葷殑璧嬪兼瀯閫犲嚱鏁?/span>
c)鍏朵粬鎴愬憳鎸変綅鎷瘋礉
5.鎻愪緵鏄劇ず鐨勬嫹璐濆拰璧嬪兼瀯閫犲嚱鏁?/span>
鍩烘湰鐨勫師鍒欐槸瀛愮被涓瀹氳璋冪敤鐖剁被鐨勭浉搴斿嚱鏁幫紝鍙傝冩柟寮?/p>
Derive(const Derive& obj):Base(obj)
{
…...
}
Derive& operator =(const Derive &obj)
{
if ( this == &obj )
return *this;
//鏂瑰紡涓
Base::operator =(obj);
//鏂瑰紡浜?/span>
static_cast<Base&>(*this) = obj;
return *this;
}
鍙﹀褰撲綘鐨勬垚鍛樺彉閲忔湁const鎴栬呭紩鐢紝緋葷粺鏃犳硶涓轟綘鎻愪緵榛樿鐨勬嫹璐濆拰璧嬪兼瀯閫犲嚱鏁幫紝鎴戜滑蹇呴』鑷繁澶勭悊榪欎簺鐗規(guī)畩鐨勬儏鍐?br />

]]>- C++澶嶄範絎旇---綾葷殑鍑芥暟鎸囬拡鍜屾櫘閫氬嚱鏁版寚閽?/title>http://www.shnenglu.com/yg2362/archive/2012/08/14/187183.html姊ㄦ爲闃沖厜姊ㄦ爲闃沖厜Tue, 14 Aug 2012 09:17:00 GMThttp://www.shnenglu.com/yg2362/archive/2012/08/14/187183.htmlhttp://www.shnenglu.com/yg2362/comments/187183.htmlhttp://www.shnenglu.com/yg2362/archive/2012/08/14/187183.html#Feedback0http://www.shnenglu.com/yg2362/comments/commentRss/187183.htmlhttp://www.shnenglu.com/yg2362/services/trackbacks/187183.html
鎴戝畾涔変竴涓被錛?br />
class A
{
public:
int add(int,int);
int mul(int,int);
int div(int,int);
};
int A::add(int a,int b)
{
return a + b;
}
int A::mul(int a,int b)
{
return a * b;
}
int A::div(int a,int b)
{
return (b !=0 ? a/b : a);
}
鎴戠幇鍦ㄦ兂瑕佸畾涔変竴涓寚閽堬紝鎸囧悜A綾誨瀷涓繑鍥炲間負int錛屽弬鏁頒負涓や釜int鐨勫嚱鏁版寚閽堛傜啛鎮(zhèn)塁鐨勫悓瀛﹂┈涓婁細鍐欏嚭typedef int (*oper)(int,int)銆備絾鏄繖涓敤鍒癈++閲屽氨鏈夐棶棰樹簡錛?br />
鍥犱負鎴戜滑鐭ラ亾錛岀被鐨勯潪static鎴愬憳鏂規(guī)硶瀹為檯涓婅繕鏈塼his鎸囬拡鐨勫弬鏁般傛瘮濡俛dd鏂規(guī)硶錛屽畠瀹為檯鐨勫畾涔夊彲鑳戒細榪欐牱int add(A* this,int a,int b);鍥犳錛屾垜浠笉鑳界畝鍗曟妸C璇█閲岀殑閭e涓滆タ鎼繃鏉ワ紝鎴戜滑闇瑕侀噸鏂板畾涔夎繖縐嶇被鍨嬬殑鎸囬拡銆傛紜仛娉曟槸鍔犱笂綾誨瀷錛宼ypedef int (A::*Action)(int,int)
typedef int (A::* Action)(int,int);
int main()
{
A a;
Action p = &A::add;
cout << (a.*p)(1,2) << endl;
return 0;
}
Action p = &A::add;榪欎釜灝辨槸璧嬪艱鍙?br />
璋冪敤鐨勬椂鍊欐敞鎰忥紝鐩存帴榪欐牱(*p)(1,2)鏄笉琛岀殑錛屽畠蹇呴』緇戝畾鍒頒竴涓璞′笂(a.*p)(1,2);鎴戜滑涔熷彲浠ユ妸綾葷殑鍑芥暟鎸囬拡瀹氫箟鍦ㄧ被鐨勫0鏄庨噷銆?br />
class A
{
public:
int add(int,int);
int mul(int,int);
int div(int,int);
int (A::*oper)(int,int);
};
涓婇潰榪欑鏂瑰紡鏄拡瀵歸潪static鎴愬憳鍑芥暟鐨勶紝閭d箞static鎴愬憳鍑芥暟鐨勫嚱鏁版寚閽堝簲璇ユ庝箞瀹氫箟鍛紝榪樿兘鐢ㄤ笂闈㈣繖縐嶆柟寮忓悧錛熸垜浠煡閬搒tatic鎴愬憳鍑芥暟鏄病鏈塼his鎸囬拡鐨勶紝鎵浠ヤ笉浼氬姞涓婄殑綾葷殑闄愬畾錛屽畠鐨勫嚱鏁版寚閽堝畾涔夋柟寮忓拰C閲岄潰鐨勫嚱鏁版寚閽堝畾涔夋柟寮忎竴鏍風(fēng)殑銆?br />
class A
{
public:
int add(int,int);
int mul(int,int);
int div(int,int);
static int sub(int,int);
};
int A::sub(int a,int b)
{
return a - b;
}
int main()
{
int (*pp)(int,int) = &A::sub;
cout << (*pp)(10,5) << endl;
return 0;
}
鎬葷粨璧鋒潵錛岄潪static鎴愬憳鍑芥暟鐨勫嚱鏁版寚閽堥渶瑕佸姞涓婄被鍚嶏紝鑰宻tatic鐨勬垚鍛樺嚱鏁扮殑鍑芥暟鎸囬拡鍜屾櫘閫氱殑鍑芥暟鎸囬拡涓鏍鳳紝娌℃湁浠涔堝尯鍒?br />鍙﹀娉ㄦ剰涓鐐圭殑鏄?br />濡傛灉鍑芥暟鎸囬拡瀹氫箟鍦ㄧ被涓紝璋冪敤鐨勬椂鍊欐湁鐐瑰尯鍒?br />class A
{
public:
int add(int,int);
int mul(int,int);
int div(int,int);
int (A::*pfunc)(int,int);
};
int main()
{
A a;
a.pfunc = &A::add;
cout << (a.*(a.pfunc))(1,2) << endl;
return 0;
}

]]> - C++澶嶄範絎旇---鍒濆鍖栧垪琛?/title>http://www.shnenglu.com/yg2362/archive/2012/08/14/187133.html姊ㄦ爲闃沖厜姊ㄦ爲闃沖厜Tue, 14 Aug 2012 02:24:00 GMThttp://www.shnenglu.com/yg2362/archive/2012/08/14/187133.htmlhttp://www.shnenglu.com/yg2362/comments/187133.htmlhttp://www.shnenglu.com/yg2362/archive/2012/08/14/187133.html#Feedback3http://www.shnenglu.com/yg2362/comments/commentRss/187133.htmlhttp://www.shnenglu.com/yg2362/services/trackbacks/187133.html寰堜箙娌℃湁紕癈++錛屼笅涓」鐩寮濮嬩嬌鐢–++錛屾墍浠ュ緢澶氫笢瑗塊渶瑕佹崱璧鋒潵閲嶆柊鐪嬬湅銆備粠浠婂ぉ璧瘋褰曚竴浜涚瑪璁幫紝鏂逛究鑷繁浠婂悗鏌ラ槄銆傝█褰掓浼狅紝鍏堜粠鏋勯犲嚱鏁扮殑鍒濆鍖栧垪琛ㄨ璧楓傛垜鎶婅繖涓煡璇嗙偣緇嗗寲鎴?涓棶棰橈紝1.涓轟粈涔堣鏈夊垵濮嬪寲鍒楄〃錛屽畠鍜屾瀯閫犲嚱鏁頒腑鍒濆鍖栨湁浠涔堜笉涓鏍楓?.鍒濆鍖栫殑欏哄簭銆?.涓浜涙敞鎰忕殑緇嗚妭銆?/span>
鍏堣絎竴涓棶棰樸傛垜浠湁涓や釜涓滆タ錛屾槸蹇呴』鍦ㄥ垵濮嬪寲鍒楄〃閲屽畬鎴愮殑錛屼竴涓槸const淇グ鐨勫彉閲忥紝涓涓槸寮曠敤銆傝繖鐐規(guī)垜灝變笉緇嗚浜嗭紝鏌ラ槄璧勬枡鐨勯兘鍙互鎵懼埌銆備笅闈㈡垜鍏蜂綋璇磋綾繪垚鍛樸?/span>
class Test1{
public:
Test1()
{
cout << "Test1 default constructor" << endl;
}
Test1(int i)
{
cout << "Test1 value constructor" << endl;
}
Test1(const Test1 &obj)
{
cout << "Test1 copy constructor" << endl;
}
Test1& operator = (const Test1 &obj)
{
cout << "Test1 = constructor" << endl;
return *this;
}
~Test1()
{
cout << "Test1 destructor" << endl;
}
};
鎴戝畾涔変竴涓被錛岀劧鍚庡啀瀹氫箟涓涓被錛屽叾涓寘鍚玊est1
class Test2
{
public:
Test2()
{
t1 = Test1(1);
}
private:
Test1 t1;
};
鎴戜滑鍦ㄦ瀯閫犲嚱鏁頒腑鍒濆鍖朤est1錛屾垜浠湅鐪嬭繍琛岀粨鏋?/span>
Test1 default constructor
Test1 value constructor
Test1 = constructor
Test1 destructor
Test1 destructor鎴戜滑鍒嗘瀽涓嬭繖涓緭鍑恒?/span>Test1 default constructor錛岃繖璇存槑鍦ㄨ繘鍏est1鏋勯犲嚱鏁頒箣鍓嶏紝宸茬粡鍒濆鍖栦簡t1鎴愬憳錛屽茍涓旇皟鐢ㄧ殑鏄棤鍙傛瀯閫犲嚱鏁般?/span>Test1 value constructor榪欎釜鏄疶est1(1)鍒涘緩鍑烘潵鐨勫璞°?/span>Test1 = constructor錛岃繖涓〃紺烘潯鐢ㄤ簡鎷瘋礉鏋勯犲嚱鏁幫紝Test1 destructor榪欎釜琛ㄧずTest1(1)榪欎釜涓存椂瀵硅薄鐨勬瀽鏋勶紝Test1 destructor榪欎釜琛ㄧず鏄痶1榪欎釜鎴愬憳瀵硅薄鐨勬瀽鏋勩備粠涓婇潰鐨勭粨鏋滄潵鐪嬶紝鏋勯犲嚱鏁頒腑t1 = Test1(1);鍏跺疄騫朵笉鏄湡姝f剰涔夋槸涓婄殑鍒濆鍖栵紝鑰屾槸涓嬈℃嫹璐濊祴鍊箋傚綋榪涘叆鏋勯犲嚱鏁板唴閮ㄤ箣鍓嶏紝綾繪垚鍛樹細琚粯璁ゆ瀯閫犲嚱鏁板垵濮嬪寲銆傚鏋滆Test1鏄釜寰堝ぇ鐨勫璞★紝榪欏潡浼氶犳垚鎬ц兘涓婄殑寮閿銆傛墍浠ワ紝榪欑偣涔熸槸浣跨敤鍒濆鍖栧垪琛ㄧ殑鍘熷洜涔嬩竴銆?br /> 絎簩鎴戜滑鍐嶆潵璇翠笅欏哄簭闂銆傜畝鍗曠殑鍘熷垯鏄垵濮嬪寲鍒楄〃閲岀殑浼氬厛浜庢瀯閫犲嚱鏁頒腑錛屽垵濮嬪寲鍒楄〃閲屼細鎸夌収鍙橀噺澹版槑鐨勯『搴忋傛垜浠叿浣撶湅鐪嬩笅闈㈢殑渚嬪瓙銆?br />class Test3(){
public:
Test3(int x,int y,int z):_z(z),_y(y)
{
_x = x;
}
private:
int _x,_y,_z;
};
鎸夌収涓婇潰鐨勮娉曪紝璧嬪肩殑欏哄簭鏄痏y,_z,_x銆?br /> 絎笁涓槸娉ㄦ剰闂錛屾瘡涓垚鍛樺彧鑳藉湪鍒濆鍖栧垪琛ㄩ噷鍑虹幇涓嬈°?br />class Test3{
public:
Test3(int x,int y,int z):_z(z),_y(y),_z(x)
{
_x = x;
}
private:
int _x,_y,_z;
};
姣斿榪欑灝辨槸闂鐨勩俖z琚垵濮嬪寲浜?嬈°?/span> 
]]>
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