Ò׽ؽØͼÈí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

¹ØÓÚC/C++ ±í´ïʽÇóֵ˳Ðò 䶨Òå


±í´ïʽµÄ¸±×÷ÓÃ
ÔËËã·ûµÄÓÅÏȼ¶Óë½áºÏÐԹ涨Á˱í´ïʽÖÐÏàÁÚÁ½¸öÔËËã·ûµÄÔËËã´ÎÐò£¬µ«¶ÔÓÚË«Ä¿
ÔËËãµÄ²Ù×÷Êý£¬C++ûÓй涨ËûÃǵļÆËã´ÎÐò¡£ÀýÈ磬¶ÔÓÚ±í´ïʽ£º
exp1 + exp2;
ÏȼÆËã exp1 »¹ÊÇ exp2£¿²»Í¬µÄ±àÒëÆ÷Óв»Í¬µÄ×ö·¨¡£
ÔÚÊýѧÉÏ£¬¶ÔÓÚË«Ä¿ÔËËã·û£¬²»ÂÛÏȼÆËãÄÄÒ»¸ö²Ù×÷Êý£¬ÒªÇó×îÖÕ¼ÆËã½á¹ûÒ»Ñù¡£
ÔÚ C++ÖУ¬ÔÚ¼ÆËãÒ»¸ö²Ù×÷Êýʱ£¬¸Ã¼ÆËã»á¸Ä±ä£¨Ó°Ï죩ÁíÒ»¸ö²Ù×÷Êý£¬´Ó¶øµ¼ÖÂÒò²Ù
×÷ÊýµÄ²»Í¬¼ÆËã´ÎÐò²úÉú²»Í¬µÄ×îÖÕ¼ÆËã½á¹û¡£¶ÔÓÚÒò²Ù×÷Êý¼ÆËãµÄ´ÎÐò²»Í¬²úÉú²»Í¬
½á¹ûµÄ±í´ïʽΪ´ø¸±×÷Óõıí´ïʽ¡£ÔÚ¼ÆËãʱ»áÓ°ÏìÆäËû²Ù×÷ÊýµÄÖµ£¬ÒýÆð¸±×÷ÓõÄÔË
Ëã·ûΪ´ø¸±×÷ÓõÄÔËËã·û¡£Èç++¡¢– –ÒÔ¼°¸÷ÖÖ¸³ÖµÔËËã·ûΪ´ø¸±×÷ÓõÄÔËËã·û¡£ÀýÈ磺
x=1,(x+2)*(++x)
ÏȼÆËã x+2 ±í´ïʽµÄֵΪ 6¡£
ÈôÏȼÆËã++x£¬ÓÉÓÚÐÞ¸ÄÁË x+2 ÖÐ x µÄÖµ£¬¼ÆËã½á¹ûΪ£¸¡£
ÔÚ C++Öй涨£¬ÏȼÆËãÂß¼­Ó루&&£©ºÍÂß¼­»ò£¨||£©µÄµÚÒ»¸ö²Ù×÷Êý£¬ÔÙ¼ÆËãµÚ¶þ
¸ö²Ù×÷Êý£¬ÒÔ±ã½øÐжÌ·ÇóÖµ¡£Ìõ¼þ£¨?:£©¡¢¶ººÅ£¨,£©ÔËËã·ûÒ²¹æ¶¨Á˲Ù×÷ÊýµÄ¼ÆËã´ÎÐò£¬
³ý´ËÒÔÍ⣬ÆäËûÔËËã·ûûÓй涨²Ù×÷ÊýµÄ¼ÆËã´ÎÐò£¬¼ÆËã´ÎÐòÓɾßÌåµÄ±àÒëÆ÷¾ö¶¨¡£Òò
´ËÔÚº¬ÕâЩÔËËã·ûµÄ±í´ïʽÖУ¬±ÜÃâÔÚ²Ù×÷ÊýÖÐÒýÈë´ø¸±×÷ÓõÄÔËËã·û¡£
±í´ïʽÇóֵ˳Ðò²»Í¬ÓÚÔËËã½áºÏÐÔºÍÓÅÏȼ¶¡£ÏÂÃæÊÇÒ»¸ö¾­µäÀý×Ó£¬±» ISO C99/ C++98 /03 Èý´ó±ê×¼Ã÷È·Ìáµ½£ºËûµÄ½á¹ûÊDz»È·¶¨(unspecified) µÄ¡£ 
i = ++i + 1;   // The behavior is unspecified 
    ÔÚ½éÉܸÅÄî֮ǰ£¬ÎÒÃÇÏȽâÊÍÒ»ÏÂËüµÄ½á¹û¡£Õâ¸ö±í´ïʽ( expression )°üº¬3¸ö×Ó±í´ïʽ( subexpression ): 
e1 =  ++i
e2 = e1  + 1
i = e2
    ÕâÈý¸ö×Ó±í´ïʽ¶¼Ã»ÓÐ˳Ðòµã( sequence point )£¬¶ø ++ i  ºÍ i = e3 ¶¼ÊÇÓи±×÷ÓÃ( side effect )µÄ±í´ïʽ¡£ÓÉÓÚûÓÐ˳Ðòµã£¬ÓïÑÔ²»±£Ö¤ÕâÁ½¸ö¸±×÷ÓõÄ˳Ðò¡£
   ¸ü¼Ó¿ÉŵÄÊÇ£¬Èç¹ûi ÊÇÒ»¸öÄÚ½¨ÀàÐÍ£¬²¢ÔÚÏÂÒ»¸ö˳Ðòµã֮ǰ±»¸Äд³¬¹ýÒ»´Î£¬ÄÇô½á¹ûÊÇ䶨Òå(undefined)µÄ£¡±ÈÈç±¾ÀýÖÐÈç¹ûÓÐ:
int i = 0x1000fffe; 
i = ++i + 1;      // The result is undefined!! 
   ÄãÒ²Ðí»áÈÏΪËûµÄ½á¹ûÊǼÓ1 »òÕß¼Ó2£¬Æäʵ¸üÔã¸â —— ½á¹û¿ÉÄÜÊÇ 0x1001ffff ¡£ËûµÄ¸ß×Ö½Ú½ÓÊÜÁËÒ»¸ö¸±×÷ÓõÄÄÚÈÝ£¬¶øµÍ×Ö½ÚÔò½ÓÊÜ


Ïà¹ØÎĵµ£º

c/c++ °æ¡°¾­µä¡±ÎÊÌâ½â´ð


·¢ÌùÇ°ÇëÏȶÁ£ºc/c++ °æ“¾­µä”ÎÊÌâ½â´ð
C/C++Ò»Ö±¶¼ÊǵØÇòÉÏʹÓÃ×î¹ã·ºµÄ±à³ÌÓïÑÔ£¬¶øÎÒÃǵÄC/C++°æ×ÔÈ»ÈËÆøÒ²²»²î£¬µ«ÊÇÒ»Ö±¶¼ÓÐһЩºÝ³õ¼¶µÄÎÊÌâÌáÁËÓÖÌᣬ²¢²»ÊÇ˵ÕâЩÎÊÌâÈçºÎÈçºÎµÄ²»ºÃ£¬»¹ÊÇÈçºÎÈçºÎµÄÈõÖÇ£¬ÕâЩÎÊÌâÒ»Ö±¶¼ÊÇÐÂÊÖѧϰµÄ»ù´¡£¬ÊDZØÐëÒª¾­¹ýµÄÃż÷£¬ËùÒÔÒ²ÓдæÔڵıØÒª£¬µ«ÊÇÌáµÄ¶àÁË£¬ ......

Indent and Format C Program Source(indent manual)

This is Edition 2.2.10 of `The `indent' Manual', for Indent Version
2.2.10, last updated 23 July 2008.
Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996 Free Software
Foundation, Inc. Copyright (C) 1995, 1996 Joseph Arceneaux. Copyright
(C) 1999 Carlo Wood. Copyright (C) 2001 David Ingamell ......

C/C++ÓïÑÔvoid¼°voidÖ¸ÕëÉî²ã̽Ë÷

¡¡¡¡1.¸ÅÊö
¡¡¡¡Ðí¶à³õѧÕ߶ÔC/C++ÓïÑÔÖеÄvoid¼°voidÖ¸ÕëÀàÐͲ»ÉõÀí½â£¬Òò´ËÔÚʹÓÃÉϳöÏÖÁËһЩ´íÎó¡£±¾ÎĽ«¶Ôvoid¹Ø¼ü×ÖµÄÉî¿Ìº¬Òå½øÐнâ˵£¬²¢ÏêÊövoid¼°voidÖ¸ÕëÀàÐ͵ÄʹÓ÷½·¨Óë¼¼ÇÉ¡£
¡¡¡¡2.voidµÄº¬Òå
¡¡¡¡voidµÄ×ÖÃæÒâ˼ÊÇ“ÎÞÀàÐÍ”£¬void *ÔòΪ“ÎÞÀàÐÍÖ¸Õ딣¬void *¿ÉÒÔÖ¸ÏòÈκÎÀàÐ͵ÄÊ ......

ѧϰCÓëJavaµÄÀà±È

´óѧµÄʱºòÑ¡ÐÞ¹ýÒ»¸öѧÆÚÈÕÓµ±Ê±ÈÕÓïÀÏʦ¶ÔÎÒÃÇ˵£º“¶ÔÓÚÖйúÈËÀ´½²£¬Ñ§Ï°Ó¢ÓïÒ»°ãÊÇ¿Þ׎øÈ¥£¬Ð¦×ųöÀ´£»Ñ§Ï°ÈÕÓïÔòÊÇЦ׎øÈ¥£¬¿Þ×ųöÀ´”¡£Òâ˼¾ÍÊÇ˵ѧϰӢÓïµÄʱºò£¬ÈëÃŵÄʱºò±È½ÏÀ§ÄÑ£¬µ«ÊÇÖ»Òª¼á³ÖѧÏÂÈ¥£¬×ª±äÁ˺ºÓïµÄ˼άϰ¹ßʱ£¬×î½ü¿ÉÒÔ°ÑÓ¢ÓïѧµÃºÜºÃ¡£¶øÈÕÓﲻͬ£¬Ò»·½ÃæÒòΪÆäÓ뺺ÓïµÄ½ôÃÜ¹Ø ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØͼ | ¸ÓICP±¸09004571ºÅ