qfedu-basic-level/day5/d6.cpp

// 测试一个整数能否被3整除
#include <iostream>

using namespace std;

int main()
{
    unsigned int n;
    cout << "请输入一个整数：";
    cin >> n;
    if (n % 3 == 0)
        cout << "能被3整除" << endl;
    else
        cout << "不能被3整除" << endl;
    return 0;
}