#include<stdio.h>
#include<stdbool.h>
#include<conio.h>
#include<math.h>
#include<string.h>

void main()
{
    float s, r, p;
    float area(float r);
    float perimeter(float r);
    printf("enter radius: ");
    scanf("%f", &r);
    s = area(r);
    p = perimeter(r);
    printf("area of circle is %f", s);
    printf("\nPerimeter of circle is %f", p);


}

float area(float r)
{
    float s;
    s = 3.14 * r * r;
    return s;
}

float perimeter(float r)
{
    float p = 2 * 3.14 * r;
    return p;

}