cpp求助，为啥这样的两个循环不能ac？

Dream_liu @ 2023-09-05 18:33:03

#include<iostream>
using namespace std;
int main()
{
    int day, coin = 1,sum = 0;
    cin >> day;
    for (int i = 0;i < day;i++)
    {
        for (int k = 0; k < coin; k++)
        {
            sum += coin;
        }
        coin++;
        if (coin == day)
        {
            break;
        }
    }
    cout << sum << endl;
    system("pause");
    return 0;
}

by zacharyzhong @ 2023-09-05 18:41:24

一堆问题：

if (coin == day)
{
    break;
}

啥意思，为什么要退出；

for (int k = 0; k < coin; k++)
{
    sum += coin;
}
coin++;

累加也不是这么累加啊

by Dream_liu @ 2023-09-05 19:08:40

@Zacharyzhong 大佬可以给点改进方向吗？

by zhangxuhao2010 @ 2023-09-05 19:32:23

#include<iostream>
using namespace std;
int main()
{
    int day, coin = 1,sum = 0,i=0;
    cin >> day;
    for (;;)
    {
        for (int k = 0; k < coin; k++)
        {
            sum += coin;
            i++;
            if (i == day)
            {
                break;
            }
        }
        if(i==day){
            break;
        }
        coin++;
    }
    cout << sum << endl;
    return 0;
}

by Dream_liu @ 2023-09-05 19:44:27

@zhangxuhao2010 感谢感谢