qfedu-basic-level/day7/d11.cpp

#include <iostream>

using namespace std;

int main()
{
    int i = 1, total = 0;
    while (i <= 100)
    {
        if (i % 3 == 0)
            total += i;
        i++;
    }

    cout << "1~100的3的倍数和为: " << total << endl;
    return 0;
}