#include <allegro.h>
void init();
void deinit();
void rysujwykres();
int main() {
    
int rozmiar = 100 ;
double tablica[100];
int cos=1 ;

for(int i=0;i<rozmiar;i++)
{
tablica[i]=cos ;
if(i==50) cos=0;
}
float deltax=0.2 / 100.0 ;    
float deltat=0.01 ;
//int czas = 100 ;
double de = 1.0e-12 ;

int color2= 000 ;   //czarny
        
    
    
	init();
for(double i=1;i<rozmiar;i=i+deltat) {
tablica[0]=tablica[1];
tablica[rozmiar]=tablica[rozmiar-1];

for(int j=1;j<rozmiar-10;j++)
{
 tablica[j]= de * deltat *((tablica[j+1]-2*tablica[j]+tablica[j-1])/(2*(deltax)*(deltax))) + tablica[j];      
}        
}
	while (!key[KEY_ENTER]) {
		/* put your code here */

rysujwykres();  
float ab, bb ;
int a, b;

for(int i=1;i<rozmiar;i++)
{
ab= (float) (tablica[i-1] / 1) * 100 ;        
bb= (float) (tablica[i] / 1) * 100 ;  
a = (int) ab;
b = (int) bb;
line(screen, 50+5*(i-1), SCREEN_H-50-((a*3)+1), 50+5*i, SCREEN_H-50-((b*3)+1), color2) ;       
}		    
  }

	deinit();
	return 0;
}
END_OF_MAIN()

void init() {
	int depth, res;
	allegro_init();
	depth = desktop_color_depth();
	if (depth == 0) depth = 32;
	set_color_depth(depth);
	res = set_gfx_mode(GFX_AUTODETECT_WINDOWED, 640, 480, 0, 0);
	if (res != 0) {
		allegro_message(allegro_error);
		exit(-1);
	}

	install_timer();
	install_keyboard();
	install_mouse();

clear_to_color( screen, makecol( 255, 255, 255));
	/* add other initializations here */
}

void deinit() {
	clear_keybuf();
	/* add other deinitializations here */
}

void rysujwykres() {
     
int color=000;
textout_ex( screen, font, "Drugie Prawo Ficka", 10, 10, makecol( 0, 0, 0), makecol( 255, 255, 255) );
line(screen, 50, 50, 50, SCREEN_H-50, color);     
triangle(screen, 50, 50, 50-10, 50+20, 50+10, 50+20, color);
line(screen, 50, SCREEN_H-50, SCREEN_W-50, SCREEN_H-50, color);   
triangle(screen, SCREEN_W-50, SCREEN_H-50, SCREEN_W-70, SCREEN_H-50-10,SCREEN_W-70, SCREEN_H-50+10, color);     
}