写个sleep玩玩

static void
sig_when_weakup(int no){
    printf("weakup weakup
");
    longjmp(buf, 1);
}

void weakup_after(int n){ 
    if(setjmp(buf) == 0){
        signal(SIGALRM, sig_when_weakup);
        alarm(n);
        pause();
    } else {
        printf("i'm weak
");
    }
}

这配色方案没法改的嘛?