‘C’ program to calculate area and circumference of a circle

C File =>

/* Write a ‘C’ program to calculate area and circumference of a circle. */

#include<stdio.h>

#define PI 3.142

int main() 

{

     int r;

     printf("\n Enter radius : ");

     scanf("%d",&r);

     printf("\n Area of circle = %f",PI*r*r);

     printf("\n Circumference of circle : %f",2*PI*r);

   return 0;

}