https://github.com/aaron-contreras/caesar-cipher

A Ruby console application that ciphers text with "Caesar Cipher" as its encryption technique.
https://github.com/aaron-contreras/caesar-cipher

Last synced: 26 days ago
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A Ruby console application that ciphers text with "Caesar Cipher" as its encryption technique.

• Host: GitHub
• URL: https://github.com/aaron-contreras/caesar-cipher
• Owner: aaron-contreras
• Created: 2020-05-18T01:19:58.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2020-07-16T23:54:34.000Z (over 4 years ago)
• Last Synced: 2024-11-12T03:44:12.447Z (about 2 months ago)
• Language: Ruby
• Size: 8.79 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Caesar Cipher

## Problem solving steps

1. ### User interface

  - Console application.

2. ### Inputs?

  - String to be ciphered.

  - Shift factor which determines the number of shifts to apply to each character.

3. ### Output?

  - Ciphered text as string.

4. ### What needs to happen to go from input to output?

  - #### Algorithm

    ```

    # Until the user doesn't want to cipher anymore

      # Get the string and shift factor from the user.

      # Split the string into individual characters.

      # Loop through each character.

        # If the character is a letter.

          # Convert the letter to its integer representation.

          # Subtract the base value from the letter depending.

          # Calculate the raw shifts by adding the shift factor to the letter to find the shifts from base value ('A' or 'a' or '0').

          # Find the remainder of diving the "raw shifts" and the range to find the "net shifts" from the base value.

          # Get the positive shift from the base value by adding the range to it and finding the remainder after dividing it by the range.

          # Add the base value back to the positive shifts to get the shifted letter in its decimal representation.

          # Convert the decimal representation to its string representation.

          # Add the letter to the list of shifted characters being returned.

        # If the character is not a letter.

          # Just add the plain character to the array of shifted letters

      # Convert the array of characters into a string.

      # Return the shifted string.

    ```