GetAsyncKeyState

#include <iostream>
#include <windows.h>
#include <chrono>

char keyboardCheck() {

    using namespace std::chrono;
    char controls[] = { 'W','S','A','D','E','Q','R'};
    char keyToCheck = 0;
    static char lockedKey;
    static steady_clock::time_point start;
    steady_clock::time_point end;
    int tick = 200;
    bool iWantToMove = false;

    for (short i = 0; i < sizeof(controls) / sizeof(char); i++) {
        if (GetAsyncKeyState(controls[i])) {
            if (keyToCheck != 0) return 0;
            keyToCheck = controls[i];
        }
    }

    end = steady_clock::now();

    if (keyToCheck == 'W' || keyToCheck == 'S' || keyToCheck == 'A' || keyToCheck == 'D')
        iWantToMove = true;

    if (duration_cast<milliseconds>(end - start).count() > tick && iWantToMove) lockedKey = 0;

    if (keyToCheck != lockedKey) {
        start = steady_clock::now();
        lockedKey = keyToCheck;
        return keyToCheck;
    }
    else return 0;
}

int main(){

    while(true) {

        char click = keyboardCheck();
        if(click) std::cout << click;

    }

    return 1;
}