PARABOLA
#include<graphics.h>
#include<math.h>
#include<stdio.h>
main()
{
int gd=DETECT,gm,x,y,i,j;
float a;
initgraph(&gd,&gm,"c:\\tc\\bgi");
setcolor(RED);
x=getmaxx()/2;
y=getmaxy()/2;
line(x,0,x,480);
line(0,y,640,y);
setcolor(LIGHTBLUE);
outtextxy(20,20,"PARABOLA");
for(a=0;a<150;a+=.01)
{
delay(10);
putpixel(x+a*a/100,y+a/2,YELLOW);
putpixel(x+a*a/100,y-a/2,YELLOW);
putpixel(x+a/2,y-a*a/100,GREEN);
putpixel(x-a/2,y-a*a/100,GREEN);
putpixel(x+a/2,y+a*a/100,BLUE);
putpixel(x-a/2,y+a*a/100,BLUE);
putpixel(x-a*a/100,y+a/2,LIGHTMAGENTA);
putpixel(x-a*a/100,y-a/2,LIGHTMAGENTA);
}
getch();
closegraph();
}