code/class/calc.cpp

#include<iostream>
#include<windows.h>

using namespace std;

/*
int main(){
    int range = 0;
    while (range != 5)
    {
        int a,s;
        cin >>a;

        s = a * a;

        cout <<"结果:"<<s<<endl;
        range++;
    }
    
    return 0;
}*/

int main(){
    int time = 15;
    while (time > 0)
    {
        cout <<"你还剩"<<time<<"分钟"<<endl;
        Sleep(60000);
        time--;
    }
    
    return 0;
}