#include<graphics.h>
#include<conio.h>
#include<alloc.h>
#include<dos.h>
#include<stdlib.h>
void *ball;
void image()
{
setcolor(RED);
setfillstyle(SOLID_FILL,RED);
fillellipse(10,10,10,10);
ball=malloc(imagesize(0,0,20,20));
getimage(0,0,20,20,ball);
cleardevice();
}
void main(void)
{
int gmode,gdriver=DETECT;
initgraph(&gdriver,&gmode,"c:\\tc\\bgi");
int l=getmaxx()/2,r=0,t=0,b=0;
int x=1,y=1;
int s=0,key=0;
int xstep=1,ystep=1;
image();
setbkcolor(GREEN);
while(key!=27)
{
while(!kbhit())
{
outtextxy(250,350,"");
setcolor(7);
putimage(l,t,ball,XOR_PUT);
delay(5);
putimage(l,t,ball,XOR_PUT);
if(l>=getmaxx()||l<=0)
{
x*=-1;sound(1000);
s=0;xstep=x*(random(4)+1);
ystep=y*(random(3)+1);
if(l<=0)
l=0;
else
l=getmaxx();
}
if(t>=getmaxy()||t<=0)
{
y*=-1;sound(1000);
s=0;ystep=y*(random(4)+1);
xstep=x*(random(3)+1);
if(t<=0)
t=0;
else
t=getmaxy();
}
l+=x+xstep;
t+=y+ystep;
s++;
if(s==5)
{
nosound();
}
}
key=getch();
}
closegraph();
}
This ball moves randomly, but I would like to move this ball just left(center), right(center), up(center), down(center) like diamond <>