Question

当我运行此代码时（来自Lazy Foo SDL教程），程序立即关闭。这是为什么？我很抱歉，由于缺乏评论，它变得有点混乱，但我认为这并不重要，因为有关于Lazy Foo帖子的评论。构建它时我没有错误。

#include "SDL/SDL_image.h"
#include "SDL/SDL.h"
#include <string>


const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;

const int SCREEN_BPP = 32;

SDL_Surface *image = NULL;
SDL_Surface *screen = NULL;
SDL_Event event;

SDL_Surface *load_image (std::string filename)
{
SDL_Surface* loadedImage = NULL;
SDL_Surface* optimizedImage = NULL;
loadedImage = IMG_Load( filename.c_str());
if(loadedImage != NULL)
{
    optimizedImage = SDL_DisplayFormat (loadedImage);
    SDL_FreeSurface(loadedImage);
}
return optimizedImage;

}
void apply_surface (int x, int y, SDL_Surface* source, SDL_Surface* destination)
{
SDL_Rect offset;
offset.x = x;
offset.y = y;
SDL_BlitSurface (source, NULL, destination, &offset);
}
bool init()
{
if (SDL_Init(SDL_INIT_EVERYTHING) == -1)
{
return false;
}
screen = SDL_SetVideoMode (SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP, SDL_SWSURFACE);
if (screen == NULL)
{
return false;
}
SDL_WM_SetCaption("Event test", NULL);
return true;
}
bool load_files()
{
image = load_image ("background.png");
if (image == NULL)
{
    return false;
}
return true;
}
void clean_up()
{
SDL_FreeSurface(image);
SDL_Quit();
}
int main(int argc, char* args[])
{
bool quit = false;
if (init() == false)
{
return 1;
}
if (load_files() == false)
{
return 1;
}
apply_surface(0,0, image, screen);
if(SDL_Flip(screen) == -1)
{
return 1;
}
while(quit == false)
{
while (SDL_PollEvent(&event))
{
    if(event.type == SDL_QUIT)
    {
        quit = true;
    }
}
}
clean_up();
return 0;
}

Answer 1

如果您在可执行文件目录中缺少background.png或任何所需的DLL，则可能会遇到奇怪的崩溃。

由于这是本系列中较简单的程序之一，我敢打赌这就是问题所在。当我有一个脑屁并忘记了一个文件时，我自己也看到过奇怪的段错误，或者它不是exe所期望的那样。

程序立即关闭SDL

1 个答案: