Forum: SDL start problem på kompis dator

#ifdef WIN32
#pragma comment(lib, "SDL.lib")
#pragma comment(lib, "SDLmain.lib")
#pragma comment(lib, "SDL_Image.lib")
#endif
 
#include "SDL.h"
#include "SDL_image.h"
#include <iostream>
 
using namespace std;
 
int DisplayBackground(SDL_Surface* destination, const char*, int x, int y);
int DisplayImage(SDL_Surface* destination, const char*, int x, int y);
 
int main( int argc, char *argv[])
{
	SDL_Surface *screen; //En yta
	SDL_Event event; //Variabel för händelser
 
	int imgX=250, imgY=290, imgBRED=150, imgH-JD=200; //Variablar för att hålla reda på vart Kuben/Bakgrunden skall ritas ut
 
	//Initiera SDL
	if( SDL_Init(SDL_INIT_AUDIO|SDL_INIT_VIDEO) < 0 )
	{
		cout <<" Error, unable to initialize SDL: " <<SDL_GetError <<endl;
		SDL_Quit();
		return 1;
	}
	else
	{
		cout <<" SDL initialized successfully!" <<endl;
	}
 
	screen = SDL_SetVideoMode(640, 480, 16, SDL_HWSURFACE|SDL_DOUBLEBUF);
 
	if (screen == NULL)
	{
		cout <<" Unable to set video mode: " <<SDL_GetError <<endl;
		SDL_Quit();
		return 1;
	}
	else
	{
		cout <<" Successfully set video mode!" <<endl;
	}
 
	while (1)
	{
		SDL_PollEvent(&event);
		switch (event.type)
		{
		case SDL_QUIT:
			{
			cout <<" Terminating Program!" <<endl;
			SDL_Quit();
			return 0;
			}
		case SDL_KEYDOWN:
			{
				Uint8 *keys;
 
				keys = SDL_GetKeyState(NULL);
					if (keys[SDLK_UP])
						imgY -= 5;
					if (keys[SDLK_DOWN])
						imgY += 5;
					if (keys[SDLK_LEFT])
						imgX -= 5;
					if (keys[SDLK_RIGHT])
						imgX += 5;
					if (keys[SDLK_ESCAPE])
					{
						cout <<" Terminating Program!" <<endl;
						SDL_Quit();
						return 0;
					}
			}
		}//Swtich slut
		DisplayBackground(screen, "background.png", imgBRED, imgH-JD);
		DisplayImage(screen, "kub.png", imgX, imgY);
		SDL_Flip(screen);
		SDL_Delay(25);
	}//While slut
 
	SDL_Quit();//Stänger SDL och frigör resurser
 
	return 0;
}//main funktionen slut
 
int DisplayBackground(SDL_Surface* destination, const char*, int x, int y)
{
	//Ladda Bakgrunden
	SDL_Surface* image;
	image = IMG_Load("background.png");
	if(image == NULL)
	{
		cout <<" Background could not be loaded!" <<endl; //Bakgrund ej hittad
		SDL_Delay(2000);
		return 1;
	}
 
	//skapar rect för positionering
	SDL_Rect pos;
	pos.x = x;
	pos.y = y;
	pos.w = image->w;
	pos.h = image->h;
 
	//Kopiera bakgrunden till ytan
	SDL_BlitSurface(image, NULL, destination, &pos);
	SDL_FreeSurface(image);
 
	return 0;
}//Bakgrundsfunktion slut
 
int DisplayImage(SDL_Surface* destination, const char*, int x, int y)
{
	//Ladda Kuben
	SDL_Surface* image;
	image = IMG_Load("kub.png");
	if (image == NULL)
	{
		cout <<" Image could not be loaded!" <<endl;//Kuben kan ej hittas
		SDL_Delay(2000);
		return 1;
	}
 
	//Skapa en rect
	SDL_Rect rect;
	rect.x = x;
	rect.y = y;
	rect.w = image->w;
	rect.h = image->h;
 
	//Kopiera över kuben till ytan
	SDL_BlitSurface(image, NULL, destination, &rect);
	SDL_FreeSurface(image);
 
	return 0;
}//Slut på kubfunktionen