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exit

Usage

   #include <stdlib.h>
   void exit(int exitstatus);

   ANSI

Description

   exit calls functions logged by atexit, all static destructors (for C++
   programs), flushes all output buffers, closes all output files and
   returns to the operating system with an exit status given by exitstatus.
   exit is the preferred function for C++ programs.

   exitstatus is normally a EXIT_SUCCESS to indicate a normal end of program
   and EXIT_FAILURE to indicate an error. Only the lower order byte of
   exitstatus is returned to the parent process. The exit status can be
   referenced by the spawn return values.

Example 

   #include <stdlib.h>
   #include <stdio.h>

   int main(int argc,char *argv[])

   {
       FILE *fp;
       if(argc > 1)
           {
           fp = fopen(argv[1],"r");
           if(fp == NULL)
               {
               fprintf(stderr,"Can't open \"%s\"\n"
           ,argv[1]);
               exit(EXIT_FAILURE);
               }
           }
       else
           {
               fprintf(stderr,"No file specified\n");
               exit(EXIT_FAILURE);
           }
       return (EXIT_SUCCESS);
   }


See Also

   abort, _exit, spawn