Question

#Sphere – pi and radius

Create two python programs named program_1 and program_2 that will calculate the surface area of a sphere. The programs will use user-defined functions. Global variables are NOT allowed in either program. Program_1 will be listed first in the answer box with Program_2 written below it. Separate the programs with a line of dashes ( --------------------------------------------- ) as shown in the example below.

Program_1 will:

1. Prompt the user for the radius of the shape and store the variable as “rad”
2. Call a user-defined function (UDF) within the program to calculate the surface area of the shape. The UDF will have an input of radius and will receive the value of pi from a second UDF.
3. Call a second user-defined function (from inside the first UDF) that is in program_2 that will produce the value of pi
4. The first UDF will then calculate the surface area of the shape and return the surface area to the main program.
5. Print the value of the radius and surface area from the main program

Program_2 will

1. Use a user-defined function that will store the value of pi in a variable named “pi_val”
2. Sends the output of the value of “pi_val” back to program_1

Answer 1

#program_1

#import all function of program_2
from program_2 import *

#user defined function for calculating surface area of the sphere
def surface_area(rad):

    #calls the getpivalue function from program_2 file
    pi = getpivalue()

    #calculates surface area of sphere that is 4 * pi * rad * rad
    ans = 4 * pi * rad *rad

    #return area of the sphere stored in ans variable
    return  ans

#takes radius eterd by user
rad = float(input("Enter the radius: "))

#prints Radius and surface area of the sphere
print("Radius: ", rad , "Surface Area: {:.2f}".format(surface_area(rad)))




-----------------------------------------------------------------------------------

#program_2

import math

#user define function that returns pi value
def getpivalue():

    #stores the value of pi in pi_val variable
    pi_val =  math.pi

    #return pi_val
    return  pi_val

I have run this code in pycharm editor. You can run in any editor of your choice.

program_1.py

program_2.py

OUTPUT: