通过键盘输入数字“1--7”，根据输入的数字，输出是星期几的英文。如:输入数字“1”，则输出 Monday。要求:用 switch 语句完成。

好的，以下是代码：

#include <iostream>
using namespace std;

int main() {
    int day;
    cout << "请输入数字 1-7：" << endl;
    cin >> day;

    switch (day) {
        case 1:
            cout << "Monday" << endl;
            break;
        case 2:
            cout << "Tuesday" << endl;
            break;
        case 3:
            cout << "Wednesday" << endl;
            break;
        case 4:
            cout << "Thursday" << endl;
            break;
        case 5:
            cout << "Friday" << endl;
            break;
        case 6:
            cout << "Saturday" << endl;
            break;
        case 7:
            cout << "Sunday" << endl;
            break;
        default:
            cout << "输入错误，请输入数字 1-7" << endl;
            break;
    }

    return 0;
}

希望能够帮到你！