abort()                  Abort Process and Return Error
 
 #include   <process.h>                  Required for declarations only
 #include   <stdlib.h>                   Use either <process.h> or <stdlib.h>
 
 void       abort(void);
 
    abort() terminates the calling process.  The message "Abnormal
    program termination" is printed to 'stderr'. Control is returned to
    the parent process.  Stream buffers are not flushed.
 
    Returns:    abort() does not return to the calling process.  It
                returns an exit status of 3 to the parent process.
 
  -------------------------------- Example ---------------------------------
 
    The following statements terminate the program if the file
    "testfile.dat" cannot be opened:
 
           #include <process.h>    /* for 'abort' (also in <stdlib.h>) */
           #include <stdio.h>      /* for 'fprintf' */
 
           main()
           {
               FILE *f;
 
               if ((f = fopen("testfile.dat", "r")) == NULL) {
                    fprintf(stderr, "can't open testfile.dat");
                    abort();
               }
           }

Seealso:


 exit() 
 _exit()