This program calculates the perimeter and area of circle
#include <stdio.h>
#include <math.h>
main ()
{
float r, p, a;
printf ("Enter the radius of Circle:");
scanf ("%f", &r);
p = 2 * 3.14 * r;
a = 3.14 * r * r;
printf ("The perimeter of circle is:%f\n", p);
printf ("The area of circle is:%f\n", a);
getch();
}
Output:--
Enter the radius of Circle: 2.5
The perimeter of circle is: 15.7
The area of circle is: 19.6
How it works
It asks for the radius of circle and calculates the perimeter and area of a circle by using circle formula
