/*课堂验证实验*/

#include<unistd.h>
#include<sys/types.h>
#include<stdio.h>
#include<errno.h>
                                                                                
main(argc,argv)
 int argc;
 char *argv[];
 {
  int pid,stat;
  if(argc!=1){
  if((pid=fork())==0){
  printf("Child pid = %d\n",getpid());
  execl(argv[1],argv[1],0);
  exit(5);
  }
  }
 pid=wait(&stat);
 printf("pid=%d,H_stat=%d,L_stat=%d\n",pid, stat>>8,stat&0xff);
 }