写个sleep玩玩

 static void
 sig_when_weakup(int no){
     printf("weakup weakup\n");
     longjmp(buf, );
 }

 void weakup_after(int n){
     if(setjmp(buf) == ){
         signal(SIGALRM, sig_when_weakup);
         alarm(n);
         pause();
     } else {
         printf("i'm weak\n");
     }
 }

这配色方案没法改的嘛?