14. Write a program which takes the radius of a circle as input from the user, passes it to another function that computes the area and the circumference of the circle and displays the value of area and circumference from the main() function.

 #include<stdio.h>

const float PI = 3.1415927;

float area(float radius);

float circum(float radius);

void main() {

 float radius;

 printf("Enter radius: ");

 scanf("%f", &radius);

 printf("Area : %.3f\n", area(radius));

 printf("Circumference: %.3f\n", circum(radius));

}

float area(float radius) {

  return PI * radius * radius;

}

float circum(float radius) {

  return 2 * PI * radius;

}