Mode Selection Enum

#include <iostream>
#include <cstdint>
using namespace std;

enum class Mode : uint8_t{
    Input,
    Output,
    PullUp,
    PullDown
};

const char* toString(Mode m){
    if(m == Mode::Input){
        return "INPUT";
    }
    else if(m == Mode::Output){
        return "OUTPUT";
    }
    else if(m == Mode::PullUp){
        return "PULLUP";
    }
    else if(m == Mode:: PullDown){
        return "PULLDOWN";
    }
}

int main() {
    int x;
    cin >> x;

    Mode m = Mode::Input; // default initialization

    if (x == 0)      m = Mode::Input;
    else if (x == 1) m = Mode::Output;
    else if (x == 2) m = Mode::PullUp;
    else if (x == 3) m = Mode::PullDown;

    cout << toString(m);
    return 0;
}

Solving Approach