/*
 * circle_fun_cons.c
 *
 *  Created on: Dec 4, 2019
 *      Author: johnsontimoj
 */
///////////////////////////////
//
// This program prompts the user for
// a radius (float) and prints the
// circumference and area of the
// corresponding circle
//
// inputs: radius
// outputs: prints circumference and area
//
///////////////////////////////////

// Preprocessor Directives
#include <stdio.h>
#define PI 3.14159

// Global Declarations
    // global variables not allowed in EE1910
float calc_area(int r);
float calc_circumference(int r);

// Main
int main(void){
   setbuf(stdout, NULL);  // disable buffering

   //  Local variables
   float radius;
   float circumference;
   float area;

   //   Get input for radius
   printf("Please enter a value for radius: ");
   scanf("%f", &radius);

   //   Calculate circumference and area
   circumference = calc_circumference(radius);
   area = calc_area(radius);

   // Output results
   printf("Circumference = %f\n", circumference);
   printf("Area = %f\n", area);

   return 0;
} // end main

float calc_circumference(int r){
    float cir_cum;
    cir_cum = 2 * PI * r;
    return cir_cum;
} // end calc_circumference

float calc_area(int r){
    float a;
    a = PI * r * r;
    return a;
} // end calc_area