Why does SDL window immediately close?

Question

This is my C++ file:

#include <iostream>
#include "window.h"
#include <SDL2/SDL.h>

int main(int argc, char* argv[]) {

   if (SDL_Init(SDL_INIT_EVERYTHING) < 0) {
     std::cout << "Something went wrong" << std::endl;
}
  else { 
   SDL_CreateWindow("Neptune's Limit", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1024, 768, SDL_WINDOW_OPENGL);
   }

   return 0;
}

When I run it, it flashes up for a half a second and then immediately closes. I have looked at the other posts about this, but the answer to them was about SDL_EVENT. I do not have that anywhere in my program.

What could be wrong?

Your window closes because your program ends. If you don't want it to end you'll need to do something to stop that. Take a look at the SDL sample programs and tutorials. — Retired Ninja, Sep 07 '18 at 01:59
I prevented the program from ending but got the same result. I declared char a; and used std::cin >> a; but the window did the same thing — Jiffis28, Sep 07 '18 at 21:05
Add an event loop, something like what's described in this question and answer: https://stackoverflow.com/questions/34424816/sdl-window-does-not-show/41044089#41044089 — Retired Ninja, Sep 07 '18 at 22:24

score 5 · Answer 1 · edited Sep 14 '18 at 12:18

After create SDL window, use while loop for maintain SDL window. I learn basic SDL functions with this tutorial

SIMPLE EXAMPLE

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

int main(int argc, char* argv[]) {

   if (SDL_Init(SDL_INIT_EVERYTHING) < 0) {
     std::cout << "Something went wrong" << std::endl;
   } else { 
     SDL_CreateWindow("Neptune's Limit", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1024, 768, SDL_WINDOW_OPENGL);
     while( true ) {
       // SDL RUNNING
       // Poll Event Code Maybe here!
     }
   }

   return 0;
}

Maybe this code doesn't exit because there's no exit-SDL code.

For exit program, add SDL_Event:

SDL POLL EVENT EX)

SDL_Event e;
while(true) { // SDL loop
  while( SDL_PollEvent( &event ) != 0 ) {
    if( event.type == SDL_QUIT ) {
      // Ctrl + C in console !
    }
  } // end of handling event.
}

Hope this helps you.

Welcome to SO. Thanks for your answer and the hint for a tutorial. In SO, it is common to post your code directly, so maybe you could add the `while` loop to the code given in the question? — CKE, Sep 13 '18 at 08:55

Why does SDL window immediately close?

1 Answers1