Write a c program to find the area and circumference of circle.

#include<stdio.h>
#include<conio.h>
#include<math.h>
  main()
{
  int r;
  float pi=3.142,area,cir;
  clrscr();
  printf("\n enter the value of r");
  scanf("\n %d",&r);
  cir=2*pi*r;
  area=pi*r*r;
  printf(" the circumference of the circle is %f",cir);
  printf(" the area of the circle is %f",area);
}

output:-
 enter the value of r=1
 circumference (cir)=6.28400
 area of circle =3.14200