Visual Studio 2017 blank window, unresponsive - c++

Question

I've been trying to create a simple C++ game in Visual Studio 2017, but I can't even get a simple black screen. The window comes up white and unresponsive, is anyone able to help? I've been learning from a free course on Udemy, it has been working up until now. My code is below.
#include <iostream>
#include <SDL.h>
#include <string>
using namespace std;
int main(int argc, char* argv[]) {
const int screenWidth = 800;
const int screenLength = 600;
if (SDL_Init(SDL_INIT_VIDEO) < 0) {
cout << "SDL init faliure" << endl;
return 0;
}
SDL_Window *window = SDL_CreateWindow("Particle Fire", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, screenWidth, screenLength, SDL_WINDOW_SHOWN);
SDL_Delay(100000);
if (window == NULL) {
SDL_Quit();
return 2;
}
SDL_Renderer * renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_PRESENTVSYNC);
SDL_Texture * texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_STATIC, screenWidth, screenLength);
if (renderer == NULL) {
cout << "Could not produce renderer";
SDL_DestroyWindow(window);
SDL_Quit();
return 3;
}
if (texture == NULL) {
cout << "Could not produce texture";
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
return 3;
}
Uint32 *buffer = new Uint32[screenWidth*screenLength];
memset(buffer, 0xFF, screenWidth*screenLength*sizeof(Uint32));
for (int i=0; i < screenWidth*screenLength; i++) {
buffer[i = 0xFFFF0000];
}
SDL_UpdateTexture(texture, NULL, buffer, screenWidth * sizeof(Uint32));
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer, texture, NULL, NULL);
SDL_RenderPresent(renderer);
bool quit = false;
SDL_UpdateTexture(texture, NULL, buffer, screenWidth * sizeof(Uint32));
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer,texture , NULL, NULL);
SDL_RenderPresent(renderer);
SDL_Event event;
while (!quit) {
while (SDL_PollEvent(&event)) {
if (event.type == SDL_QUIT) {
quit = true;
} }
}
delete buffer;
SDL_DestroyTexture(texture);
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
}
I've tried changing everything, but it doesn't work.

Answer 1

You have a 100 second delay immediately after you created the window SDL_Delay(100000);.
Also, you need to change buffer[i = 0xFFFF0000] to buffer[i] = 0xFFFF0000. The first only sets i and leaves the buffer unchanged. The second makes the pixel yellow.