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

C++µÄËÄÖÖcast²Ù×÷·ûµÄÇø±ð

dynamic_cast:   ͨ³£ÔÚ»ùÀàºÍÅÉÉúÀàÖ®¼äת»»Ê±Ê¹ÓÃ,run-time   cast  
   
  const_cast:   Ö÷ÒªÕë¶ÔconstºÍvolatileµÄת»».  
   
  static_cast:   Ò»°ãµÄת»»£¬no   run-time   check.ͨ³££¬Èç¹ûÄã²»ÖªµÀ¸ÃÓÃÄĸö£¬¾ÍÓÃÕâ¸ö¡£  
   
  reinterpret_cast:   ÓÃÓÚ½øÐÐûÓÐÈκιØÁªÖ®¼äµÄת»»£¬±ÈÈçÒ»¸ö×Ö·ûÖ¸Õëת»»ÎªÒ»¸öÕûÐÎÊý¡£  
C++µÄËÄÖÖcast²Ù×÷·ûµÄÇø±ð
·¢ÐÅÕ¾: ˮľÉçÇø (Thu Jan 26 21:15:16 2006), Õ¾ÄÚ
ÉùÃ÷ by NetMD£º
²¢·ÇÎÒµÄÔ­´´£¬À´×Ô»¥ÁªÍø£¬ÇÒÊÇÁ½ÆªÌû×ӵĺϼ¯£¬¸öÈ˾õµÃÕâÑù²Å±È½ÏÍ걸
----------------------------------------------------------------------
Q:ʲôÊÇC·ç¸ñת»»£¿Ê²Ã´ÊÇstatic_cast, dynamic_cast ÒÔ¼° reinterpret_cast£¿Çø±ðÊÇʲô£¿ÎªÊ²Ã´Òª×¢Ò⣿
A:ת»»µÄº¬ÒåÊÇͨ¹ý¸Ä±äÒ»¸ö±äÁ¿µÄÀàÐÍΪ±ðµÄÀàÐÍ´Ó¶ø¸Ä±ä¸Ã±äÁ¿µÄ±íʾ·½Ê½¡£ÎªÁËÀàÐÍת»»Ò»¸ö¼òµ¥¶ÔÏóΪÁíÒ»¸ö¶ÔÏóÄã»áʹÓô«Í³µÄÀàÐÍת»»²Ù×÷·û¡£±ÈÈ磬ΪÁËת»»Ò»¸öÀàÐÍΪdouboleµÄ¸¡µãÊýµÄÖ¸Õëµ½ÕûÐÍ£º
´úÂë:
int i;
double d;
i = (int) d;
»òÕߣº
i = int (d);
¶ÔÓÚ¾ßÓбê×¼¶¨Òåת»»µÄ¼òµ¥ÀàÐͶøÑÔ¹¤×÷µÄºÜºÃ¡£È»¶ø£¬ÕâÑùµÄת»»·ûÒ²Äܲ»·ÖÔí°×µÄÓ¦ÓÃÓÚÀࣨclass£©ºÍÀàµÄÖ¸Õë¡£ANSI-C++±ê×¼¶¨ÒåÁËËĸöеÄת»»·û£º'reinterpret_cast', 'static_cast', 'dynamic_cast' ºÍ 'const_cast'£¬Ä¿µÄÔÚÓÚ¿ØÖÆÀà(class)Ö®¼äµÄÀàÐÍת»»¡£
´úÂë:
reinterpret_cast<new_type>(expression)
dynamic_cast<new_type>(expression)
static_cast<new_type>(expression)
const_cast<new_type>(expression)
1 reinterpret_cast
'reinterpret_cast'ת»»Ò»¸öÖ¸ÕëΪÆäËüÀàÐ͵ÄÖ¸Õë¡£ËüÒ²ÔÊÐí´ÓÒ»¸öÖ¸Õëת»»ÎªÕûÊýÀàÐÍ¡£·´Ö®ÒàÈ»¡££¨Òë×¢£ºÊÇÖ¸Õë¾ßÌåµÄµØÖ·Öµ×÷ΪÕûÊýÖµ£¿£©
Õâ¸ö²Ù×÷·ûÄܹ»ÔÚ·ÇÏà¹ØµÄÀàÐÍÖ®¼äת»»¡£²Ù×÷½á¹ûÖ»ÊǼòµ¥µÄ´ÓÒ»¸öÖ¸Õëµ½±ðµÄÖ¸ÕëµÄÖµµÄ¶þ½øÖÆ¿½±´¡£ÔÚÀàÐÍÖ®¼äÖ¸ÏòµÄÄÚÈݲ»×öÈκÎÀàÐ͵ļì²éºÍת»»¡£
Èç¹ûÇé¿öÊÇ´ÓÒ»¸öÖ¸Õëµ½ÕûÐ͵Ŀ½±´£¬ÄÚÈݵĽâÊÍÊÇϵͳÏà¹ØµÄ£¬ËùÒÔÈκεÄʵÏÖ¶¼²»ÊÇ·½±ãµÄ¡£Ò»¸öת»»µ½×ã¹»´óµÄÕûÐÍÄܹ»°üº¬ËüµÄÖ¸ÕëÊÇÄܹ»×ª»»»ØÓÐЧµÄÖ¸ÕëµÄ¡£
´úÂë:
class A {};
class B {};
A * a = new A;
B * b = reinterpret_cast<B *>(a);
'reinterpret_ca


Ïà¹ØÎĵµ£º

ÉîÈëC/C++Ö®»ùÓÚCheckStackVarsµÄ°²È«¼ì²é£¨VS2008£©

×î½üһֱæ±ÏÒµµÄÏà¹ØÊÂÇ飬¼ÓÉϹ¤×÷£¬×ªÑۼ䣬ÓÖµ½Ôµ×ÁË£¬Ö®Ç°³ÐŵµÄÿÔÂһƪ²©ÎÄ£¬Ç°¼¸Ìì¾ÍÒ»Ö±ÔÚÑ°ÕÒµ½µ×Ҫдʲô£¬½üÁ½ÌìÓÖͻȻ·¢ÏÖÓкܶණÎ÷¿ÉÒÔд¡£±¾Æª¾ÍÏÈÑÓÐø֮ǰµÄһƪ»ùÓÚCookieµÄ°²È«¼ì²é»úÖÆ£¨ÉîÈëC/C++Ö®»ùÓÚCookieµÄ°²È«¼ì²é£¨VS2005£©£©À´½éÉÜÏÂÁíÍâÒ»ÖÖÔÚDEBUG°æ±¾Ïµİ²È«¼ì²é£¬Ò²¾ÍÊÇCheckStackVars¼ì ......

LinuxÏÂC++¿ª·¢¹¤¾ß½éÉÜ

LinuxÏÂC++¿ª·¢¹¤¾ß½éÉÜ
 
 
¡¡¡¡¸ÅÊö
¡¡¡¡¾ÍC£«£«¿ª·¢¹¤¾ß¶øÑÔ£¬ÓëWindowsÏÂ΢Èí£¨VC£¬ VS2005µÈ£©Ò»Í³ÌìÏÂÏà±È£¬Linux/UnixÏÂC£«£«¿ª·¢£¬¿ÉνÎ廨°ËÃÅ£¬¸÷ʽ¸÷Ñù¡£Emacs, vi, eclipse, anjuta£¬kdevelopµÈ²ã³ö²»Çî¡£
¡¡¡¡WindowsÏ£¬¿ª·¢¹¤¾ß¶àÒÔ¼¯³É¿ª·¢»·¾³IDEµÄÐÎʽչÏÖ¸ø×îÖÕÓû§¡£ÀýÈ磬VS2005¼¯³ ......

C++&wxWidgets ¿çƽ̨´°¿Ú³ÌÐò¿ª·¢(¶þ,Linuxƪ)

ÎÒÓõÄLinuxϵͳÊÇUbuntu 10.04
Ê×ÏÈ, °²×°wxWidgets 2.8. Ä¿Ç°wxWidgetsÓÐÁ½¸öÎȶ¨°æ±¾, 2.6ºÍ2.8, ÎÒÃÇÑ¡×îеÄ. ´ò¿ª “Ubuntu
Èí¼þÖÐÐÄ”, ÔÚËÑË÷¿òÀïÊäÈë “wxWidgets”, °ÑÏÂÃ漸¸öÃû×ÖÒÔ”wxWidgets Cross-platform C++ GUI
toolkit”¿ªÍ·µÄÈ«²¿°²×°. ×°Íêºó, ´ò¿ªÒ»¸öÖÕ¶Ë, ÊäÈ ......

C/C++Í·ÎļþÒ»ÀÀ


C/C++
Í·ÎļþÒ»ÀÀ

//////////////////////////////////////////////////////////////////////////
C
Í·Îļþ
(C89,C95)
(C++98,C++03Ò²°üº¬)
include <assert.h>¡¡¡¡¡¡¡¡//Õï¶Ï¿â
include <ctype.h>¡¡¡¡¡¡¡¡ //×Ö·û´¦Àíº¯Êý¿â
include <errno.h>¡¡¡¡¡¡¡¡ //´íÎó¶¨Òå
include <float.h& ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØͼ | ¸ÓICP±¸09004571ºÅ