Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

CÕûÐÍÉý¼¶ºÍѰ³£ËãÊõת»»

                                                            ANSI CÖеÄÕûÐÍÉý¼¶
char£¬short int»òÕßintÐÍλ¶Î£¨bit-field£©£¬°üÀ¨ËüÃǵÄÓзûºÅ»òÎÞ·ûºÅ±äÐÍ£¬
ÒÔ¼°Ã¶¾ÙÀàÐÍ£¬¿ÉÒÔʹÓÃÔÚÐèÒªint»òunsigned intµÄ±í´ïʽÖУ¬
Èç¹ûint¿ÉÒÔÍêÕûµØ±íʾԴÀàÐ͵ÄËùÓÐÖµ£¬ÄÇô¸ÃÀàÐ͵ÄÖµ¾Íת»»Îªint£¬·ñÔòת»»Îªunsigned int¡£
ANSI CÖеÄѰ³£ËãÊõת»»
µ±Ö´ÐÐËãÊõÔËËãʱ£¬²Ù×÷ÊýµÄÀàÐÍÈç¹û²»Í¬£¬¾Í»á·¢Éúת»»¡£
Êý¾ÝÀàÐÍÒ»°ã³¯×Ÿ¡µã¾«¶È¸ü¸ß¡¢³¤¶È¸ü³¤µÄ·½Ïòת»»£¬
ÕûÐÍÊýÈç¹ûת»»Îªsigned²»»á¶ªÊ§ÐÅÏ¢£¬¾Íת»»Îªsigned£¬·ñÔò¾Íת»»Îªunsigned¡£
Õâ¸ö³ÆÎªÖµ±£Áô£¨value preserving£©Ô­Ôò£¬ÓëK&R CËù²ÉÓõÄÎÞ·ûºÅ±£Áô£¨unsigned preserving£©Ô­Ôò²»Í¬¡£
¸¡µãÀà:
Èç¹ûÒ»¸ö²Ù×÷ÊýµÄÀàÐÍÊÇlong double£¬ÄÇôÁíÒ»¸ö²Ù×÷ÊýÎÞÂÛÊÇʲôÀàÐͶ¼½«±»×ª»»³Élong double¡£
Èç¹ûÁ½¸ö²Ù×÷Êý¶¼²»ÊÇlong doubleÐÍ£¬ÄÇôµ±ÆäÖÐÒ»¸ö²Ù×÷ÊýµÄÀàÐÍÊÇdoubleÐÍ£¬ÔòÁíÒ»¸ö¾Í½«±»×ª»»³Édouble ÐÍ¡£
Èç¹ûÁ½¸ö²Ù×÷Êý¶¼²»ÊÇdoubleÐÍ£¬¶øÆäÖÐÒ»¸ö²Ù×÷ÊýÊÇfloatÐÍ£¬ÔòÁíÒ»¸ö±»×ª»»³ÉfloatÐÍ¡£
×¢Ò⣺doubleºÍfloat¶¼²»¿ÉÓÃunsigned,shortÐÞÊΣ¬ÁíÍâfloat»¹²»¿ÉÓÃlongÐÞÊÎ
ÕûÐÎÀà¹æ:
·ñÔò£¬Á½¸ö²Ù×÷Êý¶¼²»ÊÇÈýÖÖ¸¡µãÀàÐÍÖ®Ò»£¬ËüÃÇÒ»¶¨ÊÇijÖÖÕûÖµÀàÐÍ¡£ÔÚÈ·¶¨¹²Í¬µÄÄ¿±êÌáÉýÀàÐÍ֮ǰ£¬±àÒëÆ÷½«ÔÚËùÓÐСÓÚintµÄÕûÖµÀàÐÍÉÏÊ©¼ÓÒ»¸ö±»³ÆÎªÕûÖµÌáÉý(integral promotion)µÄ¹ý³Ì¡£ÔÚ½øÐÐÕûÖµÌáÉýʱ£¬ÀàÐÍ(char¡¢signed char¡¢unsigned charºÍshort¡¢int)¶¼±»ÌáÉýΪÀàÐÍint¡£Èç¹û»úÆ÷ÉϵÄintÐÍ×ã¹»±íʾËùÓÐunsigned¡¢shoftÐ͵ÄÖµ(Õâͨ³£·¢ÉúÔÚshortÓðë¸ö×Ö±íʾ£¬¶øintÓÃÒ»¸ö×Ö±íʾµÄÇé¿öÏÂ)£¬Ôòunsigned short intÒ²±»×ª»»³Éint£¬·ñÔòËü»á±»ÌáÉýΪunsigned int¡£
wchar_tºÍö¾ÙÀàÐͱ»ÌáÉýΪÄܹ»±íʾÆäµ×²ãÀàÐÍ(underlying type)ËùÓÐÖµµÄ×îСÕûÊýÀàÐÍ¡£
Ò»µ©ÕûÖµÌáÉýÖ´ÐÐÍê±Ï£¬ÀàÐͱȽϾÍÓÖÒ»´Î¿ªÊ¼¡£Èç¹ûÒ»¸ö²Ù×÷ÊýÊÇunsigned longÐÍ£¬ÔòµÚ¶þ¸öÒ²±»×ª»»³Éunsigned longÐÍ¡£Èç¹ûÁ½¸ö²Ù×÷ÊýµÄÀàÐͶ¼²»ÊÇunsigned long£¬¶øÆäÖÐÒ»¸ö²Ù×÷ÊýÊÇ


Ïà¹ØÎĵµ£º

C¡¢C++ºÍC#µÄ²»Í¬Ö®´¦

CÊÇÃæÏò¹ý³ÌµÄ³ÌÐòÉè¼Æ£¬³ÌÐò=Êý¾Ý½á¹¹+Ëã·¨ [×îԭʼ£¬µ«±à¸ö³Ìȷʵ²»Ò×]
C++ÊÇÃæÏò¶ÔÏóµÄ³ÌÐòÉè¼Æ£¬³ÌÐò=¶à¸öÀà+ÏûÏ¢(Àà=Êý¾Ý½á+Ëã·¨)[±È½ÏÈÝÒ×ÉÏÊÖ]
C# ÊÇ´¿ÃæÏò¶ÔÏóµÄÓïÑÔ[¸ü¼Ó±È½ÏÈÝÒ×ÉÏÊÖ]
VC/VC++/VC# Ö»ÊÇÓÃÀ´¿ª·¢C/C++/C#Ó¦ÓóÌÐòµÄÈí¼þÖеÄÒ»ÖÖ¡£
......

C/C++Êý×éÃûÓëÖ¸ÕëÇø±ðÏê½â

Ö¸ÕëÊÇc/c++ÓïÑÔµÄÌØÉ«£¬¶øÊý×éÃûÓëÖ¸ÕëÓÐÌ«¶àµÄÏàËÆ£¬ÉõÖÁºÜ¶àʱºò£¬Êý×éÃû¿ÉÒÔ×÷ΪָÕëʹÓá£ÓÚÊǺõ£¬ºÜ¶à³ÌÐòÉè¼ÆÕ߾ͱ»¸ãºýÍ¿ÁË¡£¶øÐí¶àµÄ´óѧÀÏʦ£¬ËûÃÇÔÚcÓïÑԵĽÌѧ¹ý³ÌÖÐÒ²´íÎóµÃ¸øÑ§Éú½²½â£º\"Êý×éÃû¾ÍÊÇÖ¸Õë\"¡£ºÜÐÒÔË£¬ÎҵĴóѧÀÏʦ¾ÍÊÇÆäÖÐÖ®Ò»¡£Ê±ÖÁ½ñÈÕ£¬ÎÒÈÕ¸´Ò»ÈյؽøÐÐ×Åc/c++ÏîÄ¿µÄ¿ª·¢£¬¶øÉí± ......

C/C++ ÄÚÖÃÀàÐ͵ÄÊýÖµ·¶Î§

Data   Type   Ranges  
  C/C++   recognizes   the   types   shown   in   the   table   below.  
   
  Type   Name   Bytes   Other   Names   Range   of   Values    
&nb ......

c Êý×éÎÊÌâ

 
char a[10];
Ôõô¸øÕâ¸öÊý×鏳ֵĨ£¿
1¡¢¶¨ÒåµÄʱºòÖ±½ÓÓÃ×Ö·û´®¸³Öµ
char a[10]="hello";
×¢Ò⣺²»ÄÜÏȶ¨ÒåÔÙ¸øËü¸³Öµ£¬Èçchar a[10]; a[10]="hello";ÕâÑùÊÇ´íÎóµÄ£¡
2¡¢¶ÔÊý×éÖÐ×Ö·ûÖð¸ö¸³Öµ
char a[10]={'h','e','l','l','o'};
3¡¢ÀûÓÃstrcpy
char a[10]; strcpy(a, "hello");
Ò×´íÇé¿ö£º
1¡¢char a[1 ......

GNU C LIB

×ÔÓɵĸèÒ¥

¡¡¡¡±¾ÊéÊÇ×ÔÓÉÈí¼þ´ÔÊéµÄÒ»²¿·Ö£¬Ò²ÊÇÒ»Ê××ÔÓɵĸèÒ¥¡£
¡¡¡¡±¾ÊéÖвûÊöµÄGNU C¿â£¬¶¨ÒåÁËËùÓÐÔÚISO C±ê×¼Ëù¹æ¶¨µÄ£¬ÒÔ¼°POSIX±ê×¼¡¢ÆäËüÏà¹Ø±ê×¼ºÍUNIXϵͳËùÅÉÉúµÄ±ê×¼Öж¨ÒåµÄËùÓк¯Êý£¬ÎªGNU²Ù×÷ϵͳËùÖ§³Ö¡£
C³ÌÐòÉè¼ÆÓïÑÔÌṩÖîÈçÊäÈë/Êä³ö¡ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ