以下代码的输出结果是什么？

#include <iostream>
using namespace std;
int main() {
    int num = 3;
    switch (num) {
        case 1:
            cout << "Monday";
            break;
        case 2:
            cout << "Tuesday";
            break;
        case 3:
            cout << "Wednesday";
            break;
        case 4:
            cout << "Thursday";
            break;
        default:
            cout << "Invalid day";
    }
    return 0;
}

{{ select(1) }}

• Monday
• Tuesday
• Wednesday
• Invalid day