Main Code

#include <string>

std::string value(int x) {
    std::string res = "";
    switch (x) {
        case 1:
            res = "Hello";
            break;
        case 2:
            res = "What";
            break;
        case 3:
            res = "Are";
            break;
        case 4:
            res = "You";
            break;
        case 5:
            res = "Doing";
            break;
        default:
            res = "Invalid";
    }
    return res;
}

// checked on: https://godbolt.org/