test.c

#include <stdio.h>
#include <SDL2/SDL.h>

int main() {
	SDL_Init(SDL_INIT_VIDEO);
	SDL_Window* window;
	SDL_Renderer* renderer;
	SDL_CreateWindowAndRenderer(300, 300, SDL_RENDERER_PRESENTVSYNC, &window, &renderer);
	
	int running = 1;
	while(running) {
		SDL_Event e;
		while(SDL_PollEvent(&e)) {
			if(e.type == SDL_QUIT) {
				running = 0;
			}
			if(e.key.keysym.sym == SDLK_q) running = 0;
		}
	SDL_SetRenderDrawColor(renderer, 230, 230, 230, 255);
	SDL_RenderClear(renderer);

	SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
	SDL_RenderDrawLine(renderer, 119, 0, 119, 300);

	SDL_RenderPresent(renderer);
	}
	return 0;
}