C+ Plus Program

 C Program 4

#include<stdio.h>

int main()

{

int rad;

float pi=3.14,area,ci;

printf("\n enter radius of circle");

scanf("%d", &rad);

area=pi*rad*rad;

printf("\n area of circle=%f",area);

ci=2*pi*rad;

printf("\n circferme %f",ci);

}