Question

Alphabetic Telephone Number Translator

          Many companies use telephone numbers like 555-GET-FOOD so the number is easier for their customers to remember. On a standard telephone, the alphabetic letters are mapped to numbers in the following fashion:

A, B, and C = 2

            D, E, and F = 3

            G, H, and I = 4

            J, K, and L = 5

            M, N, and O = 6

            P, Q, R, and S = 7

            T, U, and V = 8

            W, X, Y, and Z = 9

For your program, you will be using a secret code as show below:

A and C = 2

            D and E = 3

            B, G, H, and I = 4

            J, K, L, and X = 5

            F, M, N, O, and P = 6

            Q = 7

            R, S, T, U, and V = 8

            X, Y, and Z = 9

            Write a program that asks the user to enter a 10-character telephone number in the format XXX-XXX-XXXX (where X can be an upper- or lower-case letter or a number).

• The program should display the telephone number with any alphabetic characters that appeared in the original translated to their numeric equivalent. For example, if the user enters 555-get-GOOD the application should display 555-438-4663.
• Your program should have good internal documentation, use methods and be user friendly.
• Make sure that when the user runs the program, they understand how to enter the telephone number – be extremely user friendly.

Answer 1

Python Program:

""" Python Program that translates Phone number into Numerical Format """

def getCharacter(ch):
   # Checking character for corresponding alphabet
   if ch in "ABC":
       return '2'
   elif ch in "DEF":
       return '3'
   elif ch in "GHI":
       return '4'
   elif ch in "JKL":
       return '5'
   elif ch in "MNO":
       return '6'
   elif ch in "PQRS":
       return '7'
   elif ch in "TUV":
       return '8'
   elif ch in "WXYZ":
       return '9'
   else:
       return ch

def getInput():
""" Reads input from user """
# Reading phone number from user
phoneNum = input("Enter the number in the format of XXX-XXX-XXXX: ")
return phoneNum.upper()
  
def main():
""" Main function """
# Reading phone number from user
phoneNum = getInput()
new_phone_num = ""
# Iterating over each character
for ch in phoneNum:
# Checking character for corresponding alphabet
new_phone_num += getCharacter(ch)
# Printing new phone number
print(new_phone_num)
  
# Calling main function
main()

Code Screenshot:

Sample Run: