#!/usr/bin/env python3

"""
PROBLEM: Chapter 6, Programming Exercise #3
Write definitions for these functions:

sphereArea(radius)    Returns the surface area of a sphere having the given radius.
sphereVolume(radius)  Returns the volume of a sphere having the given radius.

Use your functions to get the surface area and volume of a sphere of a given radius.
"""


















































"""
PSEUDOCODE:

# define a sphereArea function that takes a parameter radius and returns the surface area
# of a sphere

# define a sphereVolume function that takes a parameter radius and returns the volume
# of a sphere    

# define a "main" function
#     get a radius from the user
#     call the sphereArea function with that radius and print result
#     call the sphereVolume function with that radius and print result

# if __name__ == "__main__":
#     main()

"""






































"""
ch06ex03.py, from Zelle, Python Programming
Use functions sphereArea and sphereVolume to calculate values.
@author Richard White
@version 2014-05-28
"""

def sphereArea(radius):
    """Returns the surface area of a sphere having the given radius"""
    return 4 * 3.141592654 * radius**2

def sphereVolume(radius):
    """Returns the volume of a sphere having the given radius"""
    return 4 / 3 * 3.141592654 * radius**3

def main():
    r = eval(input("Enter the radius of a sphere: "))
    print("The area of that sphere is",sphereArea(r))
    print("and the volume of that sphere is",sphereVolume(r))


if __name__ == "__main__":
    main()