COP3502 Lab 04: Numeric Conversion Solution

Overview
This project is designed to give students practice with loops, characters, and arithmetic. Your program will take a hexadecimal or binary number string as an input and print out its decimal value.
Specification

Decoding Menu
-------------
1. Decode hexadecimal
2. Decode binary
3. Convert binary to hexadecimal
4. Quit

Please enter an option: 1

Based on the user’s selection, the program should prompt the user for the appropriate input:

Please enter the numeric string to convert: 0xbadf00d

… and should display the result of the string decoding / encoding:

Result: 195948557

It should then display the menu again. This should repeat until the program is terminated.

This project must not make use of existing hexadecimal and/or binary conversion routines built into the Python language; instead, you must do the conversion using your knowledge of binary and hexadecimal numbering systems.

Program Methods
Your program must provide and use the following methods. Each method signature must be match and it must behave as described. Methods should not display anything on the screen!
def hex_char_decode(digit)
Decodes a single hexadecimal digit and returns its value.

def hex_string_decode(hex)
Decodes an entire hexadecimal string and returns its value.

def binary_string_decode(binary)
Decodes a binary string and returns its value.

def binary_to_hex(binary)
Decodes a binary string, re-encodes it as hexadecimal, and returns the hexadecimal string.

NOTE: It is common to display hexadecimal numbers with ‘0x’ as the prefix (e.g., the number FFFFFFFF is represented as 0xFFFFFFFF. Your program must be able to convert a hexadecimal string into number regardless of whether it is prefixed with ‘0x.’ Additionally, it must handle the binary prefix ‘0b’. It is also common for hex numbers to be typed in lowercase (e.g., 0xffffffff); your program must handle upper- and lower-case letters.

Submissions
NOTE: Your output must match the example output *exactly*. If it does not, you will not receive full credit for your submission!

File: numeric_conversion.py
Method: Submit on ZyLabs

Do not submit any other files!

Sample Output

Decoding Menu
-------------
1. Decode hexadecimal
2. Decode binary
3. Convert binary to hexadecimal
4. Quit
Please enter an option: 1
Please enter the numeric string to convert: 0x4321 Result: 17185

Decoding Menu
-------------
1. Decode hexadecimal
2. Decode binary
3. Convert binary to hexadecimal
4. Quit

Please enter an option: 1
Please enter the numeric string to convert: fFfFfFfF
Result: 4294967295
Decoding Menu
-------------
1. Decode hexadecimal
2. Decode binary
3. Convert binary to hexadecimal
4. Quit

Please enter an option: 2
Please enter the numeric string to convert: 1010
Result: 10
Decoding Menu
-------------
1. Decode hexadecimal
2. Decode binary
3. Convert binary to hexadecimal
4. Quit
Please enter an option: 2
Please enter the numeric string to convert: 0b11111111
Result: 255

Decoding Menu
-------------
1. Decode hexadecimal
2. Decode binary
3. Convert binary to hexadecimal
4. Quit
Please enter an option: 3
Please enter the numeric string to convert: 111110000001
Result: F81
Decoding Menu
-------------
1. Decode hexadecimal
2. Decode binary
3. Convert binary to hexadecimal
4. Quit
Please enter an option: 4