Write a C program to implement Rotation of wheel in Graphics

Below is the source code for C program to implement Rotation of wheel in Graphics which is successfully compiled and run on Windows System to produce desired output as shown below :

SOURCE CODE : :

#include<stdio.h>
#include<graphics.h>
#include<math.h>
#include<conio.h>
#include<dos.h>
 
int xc=50,yc=200,r=35;
int x[15],y[15];
void drawcircles()
{
        setcolor(YELLOW);
        circle(xc,yc,r);
        circle(xc,yc,r+5);
}
void main()
{
        double angle=0,theta;
        int i,a;
        int gd=DETECT,gm;
        initgraph(&gd,&gm,"..\\bgi");
        a=xc+r;
        while(!kbhit())
        {
                while(a<=630)
                {
                        theta=M_PI*angle/180;
                        cleardevice();
                        drawcircles();
                        for(i=0;i<18;i++)
                        {
                                theta=M_PI*angle/180;
                                x[i]=xc+r*cos(theta);
                                y[i]=yc+r*sin(theta);
                                angle+=20;
                                line(xc,yc,x[i],y[i]);
                        }
                        angle+=2; xc+=2; a=xc+r;
                        delay(50);
                }
                xc=50;  r=35; a=xc+r;
        }
        getch();
        closegraph();
}

Above is the source code for C program to implement Rotation of wheel in Graphics which is successfully compiled and run on Windows System.The Output of the program is shown above .