sleep()

/*************************************************************************    > File Name: time.cpp    > Author: ims    > Created Time: 2017/12/3 9:53:39 ************************************************************************/#include<stdio.h>#include <unistd.h>using namespace std;int main(){for (int i = 0; i < 360; i++){sleep(1);printf("\b\b\b\b\b\b\b\b%2d:%2d:%2d", i /3600, i % 3600 / 60, i % 60);}return 0;}