/* exp11.c - - circles */
/* 把一个半径为Rlarge的圆周n等分,以各等分点为圆心Rsmall为半径画圆 */
/* rl>rs rl==rs rl<rs */
#include <graphics.h>
#include <math.h>
#define PI 3.1415926
main()
{
int x,y,rlarge,rsmall;
double a;
int gdriver=DETECT,gmode;
printf("Input Rlarge(<100)&&Rsmall\n");
scanf("%d,%d",&rlarge,&rsmall);
initgraph(&gdriver,&gmode,"c:\\tc");
cleardevice();
setbkcolor(BLUE);
setcolor(10);
for (a=0;a<=2*PI;a+=PI/18)
{
x=rlarge*cos(a)+320;
y=rlarge*sin(a)+240;
circle(x,y,rsmall);
delay(300);
}
getch();
closegraph();
}
