to find radius

hi this ritesh writing a basic c program for beginner here it go's

#include<stdio.h>

#include<conio.h>

main()

{

          int r,pi=3.14;

         float area;

         clrscr();

        
         printf("enter the value of radius of circle");

         scanf("%d",&r);

        
         area=pi*r*r;

          
        printf("the area of the circle is =%d",area);

        getch();

}

output will be

 enter the value of radius of circle=10

the area of the circle is= 312.2850