C program that read radius of circle and display area

// this is a C program that read radius of circle and display area.

#include<stdio.h>

#include<conio.h>

  void main()

{

    float r;

    float pi=3.14;

   clrscr();

     printf("Enter value of radius :");

     scanf("%f",&r);

     printf("The area of the cicle is %f.",pi*r*r);

   getch();


}