GPIO State Enum

#include <iostream>
#include <cstdint>

enum class PinState: uint8_t {
    Low,
    High
};

const char* toString(PinState s){
    if(s == PinState::Low){
        return "LOW";
    }
    else if(s == PinState::High){
        return "HIGH";
    }
}

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

    // x is guaranteed to be 0 or 1
    PinState s = (x == 0) ? PinState::Low : PinState::High;
    std::cout << toString(s);
    return 0;
}

Solving Approach