///////////////////////////////////
//
// program_1 project
//
// created 8/12/21 by tj
// rev 0
//
///////////////////////////////////
//
// Program to calculate sphere info
//
// Reads in a value for radius
// prints the volume, greatest cross section
// and greatest arc
//
// inputs: user input for R
// outputs: prints 3 values
//
///////////////////////////////////

#include "mbed.h"
#include <stdio.h>                      // only needed when printing

#define PI 3.14159

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

    // splash 
    printf("\n\nprogram_1\n");
    printf("Using Mbed OS version %d.%d.%d\n\n", 
            MBED_MAJOR_VERSION, MBED_MINOR_VERSION, MBED_PATCH_VERSION);
    printf("Welcome to my sphere program\n");
    
    // put all the variable declarations upfront
    float r;
    float volume;
    float area;
    float arc; 

    // ask for and read in radius
    printf("Please enter a value for the radius in cm: ");
    scanf("%f", &r);
    
    // calculate all 3 values
    volume = 4.0/3.0 * PI * r * r * r;
    area = PI * r * r;
    arc = 2 * PI * r;
    
    // print results
    printf("The volume of the sphere is %f cm cubed\n", volume);
    printf("The greatest cross section is %f cm squared\n", area);
    printf("The greatest arc length is %f cm\n", arc);
    
   return 0;
}// end main