GPIO State Enum

#include <iostream>
#include <cstdint>

// Declare enum class PinState with underlying type uint8_t
enum  class PinState:uint8_t{Low,High};
// Values: Low, High

// Implement: const char* toString(PinState s)
const char* toString(PinState s)
{
    switch(s){
        case PinState::Low:return "LOW";
        case 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