Mode Selection Enum

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

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

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

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

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