Program to find area and circumference of circle.

2] Program to find area and circumference of circle.
#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 ”,area);

ci=2*pi*r;

printf(“circumference=%f ”,ci);

getch();

}

Output:

enter radius of a circle: 5

area of circle=78.000

circumference=31.4