qfedu-basic-level/day7/d1.cpp

// 测试单分支结构
#include <iostream>

using namespace std;

int main()
{
    cout << "请输入一个数: ";
    int n;
    cin >> n;
    if (n % 2 == 0)
        cout << n << "666" << endl;
    return 0;
}