Rainbow

gistfile1.cpp

//RAINBOW IN C++
#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<dos.h>
void main()
{
int gdriver = DETECT,gmode;
int x,y,i;
	initgraph(&gdriver,&gmode,"D:\\TC\\BGI");
	x=getmaxx()/2;
	y=getmaxy()/2;
	for(i=40;i<200;i++)
	{
		delay(100);//forth colour pattern strip
		setcolor(i/10);
		arc(x,y,0,180,i-10);
	}
getch();
}