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c++ 涓叧浜巌nt錛寀nsigned int , short鐨勮法騫沖彴縐繪

int綾誨瀷姣旇緝鐗規畩錛屽叿浣撶殑瀛楄妭鏁板悓鏈哄櫒瀛楅暱鍜岀紪璇戝櫒鏈夊叧銆傚鏋滆淇濊瘉縐繪鎬э紝灝介噺鐢╛_int16 __int32 __int64鍚?br />__int16銆乢_int32榪欑鏁版嵁綾誨瀷鍦ㄦ墍鏈夊鉤鍙頒笅閮藉垎閰嶇浉鍚岀殑瀛楄妭銆傛墍浠ュ湪縐繪涓婁笉瀛樺湪闂銆?br />鎵璋撶殑涓嶅彲縐繪鏄寚錛氬湪涓涓鉤鍙頒笂緙栧啓鐨勪唬鐮佹棤娉曟嬁鍒板彟涓涓鉤鍙頒笂榪愯鏃訛紝涓嶈兘杈懼埌鏈熸湜鐨勮繍琛岀粨鏋?/span>銆?br />渚嬪錛氬湪32涓哄鉤鍙頒笂錛堟墍璋?2浣嶅鉤鍙版槸鎸囬氱敤瀵勫瓨鍣ㄧ殑鏁版嵁瀹藉害鏄?2錛夌紪鍐欎唬鐮侊紝int 綾誨瀷鍒嗛厤4涓瓧鑺傦紝鑰屽湪16浣嶅鉤鍙版槸鍒欏垎閰?涓瓧鑺傦紝閭ｄ箞鍦?6浣嶄笂緙栬瘧鍑烘潵鐨別xe錛?br />鍏朵腑鏄負int鍒嗛厤2瀛楄妭錛岃屽湪32浣嶅鉤鍙頒笂榪愯鏃訛紝浼氭寜鐓?涓瓧鑺傛潵瑙ｆ瀽錛屾樉鐒朵細鍑洪敊璇殑錛侊紒

鑰屽浜庨潪int琛岋紝鐩墠涓烘錛屾墍鏈夌殑綾誨瀷鍒嗛厤鐨勫瓧鑺傛暟閮芥槸鍏煎鐨勶紝鍗充笉鍚屽鉤鍙板浜庡悓涓涓被鍨嬪垎閰嶇浉鍚岀殑瀛楄妭鏁幫紒錛?br />
寤鴻錛氬湪浠ｇ爜涓敖閲忛伩鍏嶄嬌鐢╥nt綾誨瀷錛屾牴鎹笉鍚岀殑闇瑕佸彲浠ョ敤short,long,unsigned int 絳変唬鏇褲?br />
涓嬮潰鏄悇涓被鍨嬩竴瑙堣〃銆愯漿銆?br />

64浣嶆寚鐨勬槸cpu閫氱敤瀵勫瓨鍣ㄧ殑鏁版嵁瀹藉害鏄?4浣嶇殑銆?/p>
鏁版嵁綾誨瀷鍚嶇О瀛楄妭鏁?/strong>鍒悕鍙栧艱寖鍥?/strong>
int*signed,signed int鐢?a target="_blank">鎿嶄綔緋葷粺鍐沖畾錛屽嵆涓庢搷浣滅郴緇熺殑錛傚瓧闀匡紓鏈夊叧
unsigned int*unsigned鐢辨搷浣滅郴緇熷喅瀹氾紝鍗充笌鎿嶄綔緋葷粺鐨勶紓瀛楅暱錛傛湁鍏?/td>
__int81char,signed char–128 鍒?127
__int162short,short int,signed short int–32,768 鍒?32,767
__int324signed,signed int–2,147,483,648 鍒?2,147,483,647
__int648鏃?/td>–9,223,372,036,854,775,808 鍒?9,223,372,036,854,775,807
bool1鏃?/td>false 鎴?true
char1signed char–128 鍒?127
unsigned char1鏃?/td>0 鍒?255
short2short int,signed short int–32,768 鍒?32,767
unsigned short2unsigned short int0 鍒?65,535
long4long int,signed long int–2,147,483,648 鍒?2,147,483,647
long long8none (but equivalent to __int64)–9,223,372,036,854,775,808 鍒?9,223,372,036,854,775,807
unsigned long4unsigned long int0 鍒?4,294,967,295
enum*鏃?/td>鐢辨搷浣滅郴緇熷喅瀹氾紝鍗充笌鎿嶄綔緋葷粺鐨勶紓瀛楅暱錛傛湁鍏?/td>
float4鏃?/td>3.4E +/- 38 (7 digits)
double8鏃?/td>1.7E +/- 308 (15 digits)
long double8鏃?/td>1.7E +/- 308 (15 digits)
wchar_t2__wchar_t0 鍒?65,535
綾誨瀷鏍囪瘑絎?/td>綾誨瀷璇存槑闀垮害
錛堝瓧鑺傦級		鑼冨洿澶囨敞
char瀛楃鍨?/td>1-128 ~ 127-27 ~ (27 -1)
unsigned char鏃犵瀛楃鍨?/td>10 ~ 2550 ~ (28 -1)
short int鐭暣鍨?/td>2-32768 ~ 327672-15 ~ (215 - 1)
unsigned short int鏃犵鐭暣鍨?/td>20 ~ 655350 ~ (216 - 1)
int鏁村瀷4-2147483648 ~ 2147483647-231 ~ (231 - 1)
unsigned int鏃犵鏁村瀷40 ~ 42949672950 ~ (232-1)
float瀹炲瀷錛堝崟綺懼害錛?/td>41.18*10-38 ~ 3.40*10387浣嶆湁鏁堜綅
double瀹炲瀷錛堝弻綺懼害錛?/td>82.23*10-308 ~ 1.79*1030815浣嶆湁鏁堜綅
long double瀹炲瀷錛堥暱鍙岀簿搴︼級103.37*10-4932 ~ 1.18*10493219浣嶆湁鏁堜綅


鍙戣〃浜?2011-04-15 14:02 闃?#960; 闃呰(1812) 璇勮(4)  緙栬緫 鏀惰棌 寮曠敤 鎵灞炲垎綾? 鍏跺畠
 
璇勮
# re: c++ 涓叧浜巌nt錛寀nsigned int , short鐨勮法騫沖彴縐繪
C99搴旇鐢╥nt**_t
絀烘槑嫻佽漿 璇勮浜?2011-04-15 16:14  鍥炲  鏇村璇勮    
# re: c++ 涓叧浜巌nt錛寀nsigned int , short鐨勮法騫沖彴縐繪
鎴戜篃鍋氳繃縐繪.
褰卞搷涓?6浣嶅鉤鍙幫紝澶氱敤C鏉ュ紑鏉ワ紝澶氭槸宓屽叆寮忓紑鍙?
32銆?4浣嶅湪PC銆佹湇鍔″櫒綰ц緝澶氾紝鐩墠16浣嶅凡寰堝皯.
鎴戜釜浜鴻涓篿nt鍨嬬浉浜庡long綾誨瀷瑕佸畨鍏?
long綾誨瀷鍦╳indows錛?4涓嬶紝浠嶆槸32瀛楄妭錛?
浣嗗湪LINUX錛?4涓媗ong鍜屾寚閽堟槸鐩稿綋鐨勶紝宸插崌綰у埌浜?4瀛楄妭錛?
濡傛灉緇撴瀯浣撲腑浣跨敤long錛岀粨鏋滃ぇ灝忔湁鍙橈紝windows64涓嬪仛鐨勮祫婧愬湪linux涓?4澶勭悊錛屼細鏈夐棶棰橈紝
鏈甯歌鐨勮祫婧愬ご澶у皬灝變竴鑷?
濡傛灉鏄ぇ鍨嬮」鐩紝榪樻槸寤虹珛鑷繁鐨勪竴濂椾綆灞傚熀鏈暟鎹被鍨嬪皝瑁呮柟涓轟笂絳?
bbxyard 璇勮浜?2011-04-15 23:33  鍥炲  鏇村璇勮    
# re: c++ 涓叧浜巌nt錛寀nsigned int , short鐨勮法騫沖彴縐繪[鏈櫥褰昡
lz璇寸殑涓嶅錛屽簲璇ョ敤int8_t, int16_t,int32_t, int64_t, uintXX_t 絳夌瓑銆傝屼互涓や釜涓嬪垝綰垮紑澶寸殑閭ｇ綾誨瀷鏄井杞嚜宸辯殑涓滆タ錛屾槸涓嶅彲浠ョЩ妞嶇殑銆?/div>
Alex 璇勮浜?2011-04-16 23:52  鍥炲  鏇村璇勮    
# re: c++ 涓叧浜巌nt錛寀nsigned int , short鐨勮法騫沖彴縐繪
鍘熸潵榪欎箞澶嶆潅鍟婏紝鍒嗘瀽鐨勫ソ璇︾粏錛岄《錛?/div>
free keylogger 璇勮浜?2011-09-08 22:46  鍥炲  鏇村璇勮    
 

============================================================

C/C++ 32浣嶆満鍣ㄥ拰64浣嶆満鍣?宸紓闂鎬葷粨 璺ㄥ鉤鍙?縐繪闂 璇█緙栫▼闇瑕佹敞鎰忕殑64浣嶅拰32鏈哄櫒鐨勫尯鍒?nbsp; 

2011-09-28 22:39:45|  鍒嗙被錛? C++ |  鏍囩錛?/span>c++  64浣嶆満  鏁版嵁綾誨瀷   |瀛楀彿 璁㈤槄

杞澆鑷細http://hi.baidu.com/jrckkyy/blog/item/61d7869b264d64aec8eaf411.html

#include <stddef.h>

OS version錛歊ed Hat Enterprise Linux Server release 5.3 (Tikanga) Linux 2.6.18-128.el5 #1 SMP Wed Dec 17 11:41:38 EST 2008 x86_64 x86_64 x86_64 GNU/Linux

size_t鏈韓涓涓綔鐢ㄥ氨鏄伩鍏嶈冭檻64榪樻槸32銆?4浣嶄笅Long鍜屾寚閽堟槸64浣嶇殑

size_tm_unNo;

sprintf(path,"%u",m_unNo); //榪欏彞鍦?2浣嶆満鍣ㄤ笂姝ｅ父 64浣嶆満鍣ㄤ笂浼氱紪璇戣鍛婏細“璀﹀憡錛氭牸寮?‘%u’ 闇瑕佺被鍨?‘unsigned int’錛屼絾瀹炲弬 4 鐨勭被鍨嬩負 ‘size_t’”

%u 瀵瑰簲 unsigned int鍦?4浣嶆満鍣ㄤ笂榪樻槸32浣嶏紝鑰宻ize_t宸茬粡鍙樻垚64浣嶄簡銆?/span>

char* 鎸囬拡鍦?4浣嶄笅鏄?4浣?/span>

m_pMem = new char[nSize];
int off = (int)m_pMem%nAlign; // 鍦?32浣嶇紪璇戞甯革紝鍦?4浣嶆満鍣ㄤ笂緙栬瘧鎶ラ敊錛?#8220; 閿欒錛氫粠 ‘char*’ 鍒?‘int’ 鐨勮漿鎹㈡崯澶辯簿搴?#8221;

鏀逛負灝卞彲浠ヨ揪鍒板吋瀹規晥鏋滀簡int off = (uint64_t)m_pMem%nAlign; // 鍥犱負int鍦?4浣嶄笅浠嶄負32浣嶏紝char×宸茬粡鍙樹綅64浣嶄簡銆?/span>

 

 

 

 

涓銆佹暟鎹被鍨嬬壒鍒槸int鐩稿叧鐨勭被鍨嬪湪涓嶅悓浣嶆暟鏈哄櫒鐨勫鉤鍙頒笅闀垮害涓嶅悓銆侰99鏍囧噯騫朵笉瑙勫畾鍏蜂綋鏁版嵁綾誨瀷鐨勯暱搴﹀ぇ灝忥紝鍙瀹氱駭鍒備綔涓嬫瘮杈冿細

16浣嶅鉤鍙?/p>

char         1涓瓧鑺?浣?/p>

short        2涓瓧鑺?6浣?/p>

int            2涓瓧鑺?6浣?/p>

long         4涓瓧鑺?2浣?/p>

鎸囬拡         2涓瓧鑺?/p>

32浣嶅鉤鍙?/p>

char         1涓瓧鑺?浣?/p>

short        2涓瓧鑺?6浣?/p>

int            4涓瓧鑺?2浣?/p>

long         4涓瓧鑺?/p>

long long 8涓瓧鑺?/p>

鎸囬拡         4涓瓧鑺?/p>

64浣嶅鉤鍙?/p>

char         1涓瓧鑺?/p>

short        2涓瓧鑺?/p>

int            4涓瓧鑺?/p>

long         8涓瓧鑺傦紙鍖哄埆錛?/p>

long long 8涓瓧鑺?/p>

鎸囬拡        8涓瓧鑺傦紙鍖哄埆錛?/p>

浜屻佺紪紼嬫敞鎰忎簨欏?/p>

涓轟簡淇濊瘉騫沖彴鐨勯氱敤鎬э紝紼嬪簭涓敖閲忎笉瑕佷嬌鐢╨ong鏁版嵁搴撳瀷銆傚彲浠ヤ嬌鐢ㄥ浐瀹氬ぇ灝忕殑鏁版嵁綾誨瀷瀹忓畾涔夛細

typedef signed char       int8_t

typedef short int             int16_t;

typedef int                      int32_t;

# if __WORDSIZE == 64
typedef long int              int64_t;
# else
__extension__
typedef long long int      int64_t;

#endif

涓夈佷嬌鐢╥nt鏃朵篃鍙互浣跨敤intptr_t鏉ヤ繚璇佸鉤鍙扮殑閫氱敤鎬э紝瀹冨湪涓嶅悓鐨勫鉤鍙頒笂緙栬瘧鏃墮暱搴︿笉鍚岋紝浣嗛兘鏄爣鍑嗙殑騫沖彴闀垮害錛屾瘮濡?4浣嶆満鍣ㄥ畠鐨勯暱搴﹀氨鏄?瀛楄妭錛?2浣嶆満鍣ㄥ畠鐨勯暱搴︽槸4瀛楄妭錛屽畾涔夊涓嬶細

#if __WORDSIZE == 64
typedef long int                intptr_t;
#else
typedef int                        intptr_t;
#endif
緙栫▼涓灝介噺浣跨敤sizeof鏉ヨ綆楁暟鎹被鍨嬬殑澶у皬

浠ヤ笂綾誨瀷瀹氫箟閮芥湁鐩稿簲鐨勬棤絎﹀彿綾誨瀷銆?/p>

鍙?澶栬繕鏈塻size_t鍜宻ize_t鍒嗗埆鏄痷nsigned鍜宻igned size of computer word size銆傚畠浠篃鏄〃紺鴻綆楁満鐨勫瓧闀匡紝鍦?2浣嶆満鍣ㄤ笂鏄痠nt鍨嬶紝鍦?4浣嶆満鍣ㄤ笂long鍨嬶紝浠庢煇縐嶆剰涔変笂鏉ヨ瀹冧滑絳夊悓浜巌ntptr_t鍜?uintptr_t銆傚畠浠湪stddef.h閲岄潰瀹氫箟銆傞渶瑕佹敞鎰忕殑鏄痵ocket鐨刟ccept鍑芥暟鍦ㄦ湁浜涙搷浣滅郴緇熶笂浣跨敤size_t鏄笉姝ｇ‘鐨勶紝鍥犱負 accept鎺ユ敹鐨刬nt*綾誨瀷錛岃宻ize_t鍙兘鏄痩ong int 綾誨瀷銆傚悗鏉SD浣跨敤sock_t鏉ユ浛浠ｅ畠銆?/p>



澶氬僵浜虹敓 2012-05-15 17:00 鍙戣〃璇勮
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