exercise02.c

#include<stdio.h>
#include<conio.h>
void main()
{
	int r;
	float pi = 3.14, area, ci;
	//clrscr();
	printf("enter radius of circle:");
	scanf("%d", &r);
	area = pi*r*r;
	printf("area of circle=%f\n", area);
	ci = 2 * pi*r;
	printf("circumference=%f", ci);
	getch();
}