Source code in C for moving circle screensaver?

Answer 1

#include

#include

#include

#include

#include

void main()

{

int dr,md,midx,i, midy,dx,dy,mx, my,k,x,y,xdir,ydir,oldx,oldy;

double pi,tpi,a,t;

void *ball;

unsigned imgsize;

dr = DETECT;

initgraph(&dr, &md, "c:\\tc\\bgi");

midx = getmaxx()/2; midy = getmaxy()/2;

pi = 3.14159;

tpi = pi * 2.0;

setcolor(13);

circle(midx,midy,10);

imgsize = imagesize(midx-10, midy-10, midx+10, midy+10);

ball = malloc(imgsize);

getimage(midx-10, midy-10, midx+10, midy+10,ball);

putimage(midx-10, midy-10, ball,XOR_PUT);

xdir = -5; ydir=5;

do

{

oldx = midx; oldy = midy;

midx = midx + random(xdir);

midy = midy + random(ydir) ;

if (midx < 0)

{

midx = midx + 5;

xdir =5;

}

if (midx > getmaxx())

{

midx = midx - 5;

xdir = -5;

}

if (midy < 0)

{

midy = midy + 5;

ydir = 5;

}

if (midy > getmaxy())

{

midy = midy - 5;

ydir = -5;

}

putimage(midx-10, midy-10,ball,XOR_PUT);

for (a=1.0; a<30000.0; a=a+0.1);

{

}

putimage(midx-10, midy-10,ball,XOR_PUT);

} while (!kbhit());

getch();

}