SDL keycodes vs scancodes

sdlscankey.c

// Can be compiled on Linux with the command:
// gcc -Wall -Wextra -std=c99 sdlscankey.c -o sdlscankey $(pkg-config --cflags --libs sdl2) -lm

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

#include <SDL2/SDL.h>

bool pollEvents() {
	SDL_Event e;
	while (SDL_PollEvent(&e)) {
		switch (e.type) {
		case SDL_QUIT:
			return false;

		case SDL_KEYDOWN:
			printf(" keycode=%s\nscancode=%s\n\n",
					SDL_GetKeyName(e.key.keysym.sym),
					SDL_GetScancodeName(e.key.keysym.scancode));
			break;
		}
	}

	return true;
}

int main(void) {
	if (SDL_Init(SDL_INIT_VIDEO)) {
		puts(SDL_GetError());
		return 1;
	}

	SDL_Window *window = SDL_CreateWindow("Keycodes",
			SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 500, 300, SDL_WINDOW_SHOWN);
	if (window == NULL) {
		puts(SDL_GetError());
		SDL_Quit();
		return 1;
	}

	puts("Keycode: Should display the character labeled on the keyboard");
	puts("Scancode: Should display the character as if it were a QWERTY keyboard");

	while (pollEvents()) {
		SDL_Surface *surface = SDL_GetWindowSurface(window);
		if (surface == NULL) {
			continue;
		}

		SDL_FillRect(surface, NULL, 0);
		SDL_UpdateWindowSurface(window);
	}

	SDL_DestroyWindow(window);
	SDL_Quit();
	return 0;
}