From:	"Roger Lindström" <kjell DOT lindstrom AT sundsvall DOT mail DOT telia DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	program crash
Date:	Sat, 2 Jan 1999 16:45:46 +0100
Organization:	Telia Internet Services
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Help!! My program crashes if antal ( look at row **** This one ****) is over
12000. Can someone tell me wahts wrong.

#include <stdio.h>
#include <math.h>
#include "allegro.h"

class Star {
private:
    int posX,posY;
    int speedX,speedY;
    int color;
public:
    void set(int x,int y,int col,int size);
    void operator ++ (int);
    void clear();
    void putStar();
};

void Star::set(int x,int y,int col,int size) {
    posX=x<<16; posY=y<<16; color=col;
    double speed=random()%size;
    double vinkel=random();
    speedX=speed*cos(vinkel);
    speedY=speed*sin(vinkel);
}
void Star::operator++ (int) {
    clear();
    posX+=speedX; posY+=speedY;
    putStar();
    speedX-=speedX/70; speedY-=speedY/70;
    speedY+=450;
}
void Star::clear()   { putpixel(screen,posX>>16,posY>>16,0); }
void Star::putStar() { putpixel(screen,posX>>16,posY>>16,color); }

int main()
{
   allegro_init();
   install_keyboard();
   set_color_depth(32);
   if(set_gfx_mode(GFX_AUTODETECT, 1024, 768, 0, 0) != 0) {
       set_gfx_mode(GFX_TEXT, 0, 0, 0, 0);
       printf("Unable to select a 1024x768 32 bit screen mode\n");
       return 0;
   }

    clear_keybuf();
    int key=0;
    while (key!=27) {
#define antal 1000 // **** This one ****
        Star lista[antal];
        for(int i=0; i<antal; i++) lista[i].set(500,350,random(),0x40000);
        for(int a=0; a<250; a++) {
            vsync();
            for(int i=0; i<antal; i++)  lista[i]++;
        }
    for(int i=0; i<antal; i++) lista[i].clear();
    key=readkey()&0xff;
    }
    return 0;
}

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