How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask ATLProg Your Own Question

ATLProg
ATLProg, Software Engineer
Category: Homework
Satisfied Customers: 9151
Experience:  Expert in Java C++ C C# VB Javascript Design SQL HTML
44910485
Type Your Homework Question Here...
ATLProg is online now
A new question is answered every 9 seconds

Provide a complete program that performs a simple substitution

This answer was rated:

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
HWVDHU shifted by 3 to right would become EASTER

This is how the early Caesar Cipher worked.


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.
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 . . .

Hello Welcome. Thank you for your question, I’m ATLProg and I’ll try to help you.

How soon do you need this answer ?
Customer: replied 3 years ago.

For ATLProg only


 


Hello I would like an answer by tomorrow if possible but Sunday morning at the very latest.

Customer: replied 3 years ago.

For ATLProg only


 


also I need this in java

It will be ready in next few minutes
Download Answer Link I hope I’ve provided the information you were seeking. If you are happy with my service, please provide a rating. If not, please let me know so l can continue to help you. Thank you.
Customer: replied 3 years ago.

great answer but there is one minor flaw at the end.


 


the last shift of 5 should output ZWDDG


 


The result I got was


 


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

Customer: replied 3 years ago.

never mind the program works perfectly thank you for the help!

THIS ANSWER IS LOCKED!

You need to spend $3 to view this post. Add Funds to your account and buy credits.
ATLProg and 4 other Homework Specialists are ready to help you