Efficient Handling of Key Presses in SDL2

1#include <SDL.h>
2#include <iostream>
3
4int main(int argc, char** argv) {
5  SDL_Init(SDL_INIT_VIDEO);
6  SDL_Window* window =
7    SDL_CreateWindow(
8      "Key Press Example", 100, 100, 640, 480, 0);
9
10  const Uint8* state = SDL_GetKeyboardState(NULL);
11  bool running = true;
12  SDL_Event event;
13  while (running) {
14    SDL_PollEvent(&event);
15    if (event.type == SDL_QUIT) running = false;
16    if (state[SDL_SCANCODE_UP])
17      std::cout << "Up key is pressed.\n";
18    if (state[SDL_SCANCODE_DOWN])
19      std::cout << "Down key is pressed.\n";
20  }
21
22  SDL_DestroyWindow(window);
23  SDL_Quit();
24  return 0;
25}