Java - Provide a complete program that performs a simple substitution cipher. The program should take plain text and a shift value and produce the encrypted text

Regular Price: $25.00

Special Price $15.00

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Details

Details

Program Week 3

Grading Information: This Program is due on Sunday of Week 3.

Comments are REQUIRED; flow charts and Pseudocode are NOT REQUIRED.

Directions

Points

The file must be called <YourNameProg3.java>

Example: KenDeweyProg3.java

Ensure you include ALL files required to make your program compile and run.
I would like to see your .java files only.

Proper coding conventions required the first letter of the class start with a capital letter and the first letter of each additional word start with a capital letter

5%

Style Requirements

Refer to the Java Coding Style Document.
Add comments as required for all .java files.

10%

Overall Requirements

Provide a complete program that performs a simple substitution cipher. The program should take plain text and a shift value and produce the encrypted text. Then it should take encrypted text and a shift value and produce the plain text once again. A different encrypted text and shift can be entered so make sure to get input.

Example:
EASTER shifted by 3 to left would become HDVWHU
HDVWHU shifted by 3 to right would become EASTER

This is how the early Caesar Cipher worked.

 

YourNameProg3.java

Provide a main method. It should:

  • Get input for a string and a shift value
  • Convert to upper case
  • Only perform the following items on alphabetic characters between A and Z
  • Utilize a for loop which uses postfix incrementing operator
    • Convert character to its ASCII equivalent (type cast)
    • Shift buy shift value entered above
      • If you reach end of alphabet, wrap around
      • Example: A shifted to the left 2 would become Y
    • Convert back to its character equivalent (type cast)
    • Output the new character
  • Get input for a string and a shift value
  • Perform same steps above to convert the encrypted text back to plain text
  • Be sure to get input again as a different encrypted text may be entered

Utilize postfix increment/decrement operations and compound assignment operators for all math. Example: x++ or x+=2.

80%

Mimic the sample session precisely.

 

Upload your page to the Dropbox.

NOTE: Complete your activity and submit it to the Dropbox.

5%

Total Points

100%

Sample Session:

Please enter text to encrypt
easter
Please enter shift value
3
BXPQBO
Please enter text to decrypt
bxpqbo
Please enter shift value
-3
EASTER
Press any key to continue . . .

Sample Session 2: : (Notice spaces removed from input)

Please enter text to encrypt
This Is A Test
Please enter shift value
3
QEFPFPXQBPQ
Please enter text to decrypt
qefpfpxqbpq
Please enter shift value
-3
THISISATEST
Press any key to continue . . .

Sample Session 3: (Notice the different shift and decrypt value)

Please enter text to encrypt
hello
Please enter shift value
3
EBIIL
Please enter text to decrypt
ebiil
Please enter shift value
5
ZWDDG
Press any key to continue . . .

 

 

 

Additional Info

Additional Info

Programming LanguageJava

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