Ranibow design in c Language

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C Program to  Create rainbow
#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,"C:\\Turboc3\\BGI");
    x=getmaxx()/2;
    y=getmaxy()/2;
    for(i=30;i<200;i++)
    {
        delay(100);
        setcolor(i/10);
        arc(x,y,0,180,i-10);
    }
getch();
}


Out put

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