Mode Selection Enum

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

// declare enum class Mode with values Input, Output, PullUp, PullDown
enum Mode : uint8_t{
    Input,
    Output,
    PullUp,
    PullDown
};
// implement const char* toString(Mode m)
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 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