Mode Selection Enum

#include <iostream>
#include <cstdint>
using namespace std;
enum class Mode
{
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";
    }
    else
    {

    }
}
// your code here: declare enum class Mode with values Input, Output, PullUp, PullDown

// your code here: implement const char* toString(Mode m)

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;
}