经常看到exit(1),exit(-1),exit(0),exit(status)的参数到底各代表啥意思？

经常看到exit(1),exit(-1),exit(0),exit(status)的参数到底各代表啥意思？ 问题点数：10、回复次数：5Top

1 楼canany1tellme（菜鸟c）回复于 2005-01-01 16:43:47 得分 0

没什么意思，一般来说exit的参数是进程的返回码，一般是错误码，0表示没有错误，不过你可以自己定义Top

2 楼hiiiiiijiang（等待毕业）回复于 2005-01-01 17:09:28 得分 2

The   exit   and   _exit   functions   terminate   the   calling   process.   exit   calls,   in   last-in-first-out   (LIFO)   order,   the   functions   registered   by   atexit   and   _onexit,   then   flushes   all   file   buffers   before   terminating   the   process.   _exit   terminates   the   process   without   processing   atexit   or   _onexit   or   flushing   stream   buffers.   The   status   value   is   typically   set   to   0   to   indicate   a   normal   exit   and   set   to   some   other   value   to   indicate   an   error.  
   
  Although   the   exit   and   _exit   calls   do   not   return   a   value,   the   low-order   byte   of   status   is   made   available   to   the   waiting   calling   process,   if   one   exists,   after   the   calling   process   exits.   The   status   value   is   available   to   the   operating-system   batch   command   ERRORLEVEL   and   is   represented   by   one   of   two   constants:   EXIT_SUCCESS,   which   represents   a   value   of   0,   or   EXIT_FAILURE,   which   represents   a   value   of   1.   The   behavior   of   exit,   _exit,   _cexit,   and   _c_exit   is   as   follows.  
   
  Function   Description    
  exit   Performs   complete   C   library   termination   procedures,   terminates   the   process,   and   exits   with   the   supplied   status   code.    
  _exit   Performs   “quick”   C   library   termination   procedures,   terminates   the   process,   and   exits   with   the   supplied   status   code.    
  _cexit   Performs   complete   C   library   termination   procedures   and   returns   to   the   caller,   but   does   not   terminate   the   process.    
  _c_exit   Performs   “quick”   C   library   termination   procedures   and   returns   to   the   caller,   but   does   not   terminate   the   process.    
   
   
  Example  
   
  /*   EXITER.C:   This   program   prompts   the   user   for   a   yes  
    *   or   no   and   returns   an   exit   code   of   1   if   the  
    *   user   answers   Y   or   y;   otherwise   it   returns   0.   The  
    *   error   code   could   be   tested   in   a   batch   file.  
    */  
   
  #include   <conio.h>  
  #include   <stdlib.h>  
   
  void   main(   void   )  
  {  
        int   ch;  
   
        _cputs(   "Yes   or   no?   "   );  
        ch   =   _getch();  
        _cputs(   "\r\n"   );  
        if(   toupper(   ch   )   ==   'Y'   )  
              exit(   1   );  
        else  
              exit(   0   );  
  }  
   
  Top

3 楼guangsan（丑草）回复于 2005-01-01 18:02:15 得分 4

就是一个指定的进程退出代码。如果是一个单一的程序，status是0，－1，1都一样使程序退出（不知道这个退出代码如何处理）。  
   
  如果是一个子进程，可以使用GetExitCodeProcess获得退出代码，然后进行处理。  
   
   
   
  但是在面向对象的环境中由于exit()和abort()不销毁对象请不要在面向对象环境中使用abort()和exit()。Top

4 楼liudaqin（&& || ! 路漫漫其修远兮）回复于 2005-01-02 09:30:21 得分 2

学习Top

5 楼angelcool（快乐需要创造）回复于 2005-01-02 09:42:58 得分 2

知识Top

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