C Program to find area and circumference of Circle

Make a simple c program to find the area and circumference of the circle by inputting the radius of the circle.Below is the sample of the C program with solution -

/*C program to find the area and circumference of circle*/
#include<stdio.h>
void main()
{
     float r,pi=3.14,cir,area;

     printf("Enter the Radius of the circle \n");
     scanf("%f",&r);

     cir=2*pi*r;
     area=pi*r*r;

     printf("\n Circumference of circle is \t %f",cir);
     printf("\n Area of circle is \t %f",area);
     getch();
}

Input -
Enter the radius of the circle – 3

Output -
Circumference of circle is 18.84
Area of circle is 28.26