Write code to encrypt file using rot13

Question

1.00/5 (2 votes)

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I am trying to encrypt text from a file using rot13. Can someone help me with the code I will need to translate the text?

What I have tried:

C#

private void rotEncrypt() {
      StringBuilder result = new StringBuilder();
      foreach (char i in text.ToString()) {
          if (i >= 'a' && i <= 'm' || i >= 'A' && i <= 'M') {
              result.Append((char)((int)i + 13));
          }
          else if (i >= 'n' && i <= 'z' || i >= 'N' && i <= 'Z') {
              result.Append((char)((int)i - 13));
          }
          else {
              // Leave other characters unchanged
              result.Append(i);
          }

          // Output the resulting string
          lbxEncryption.Items.Add(result.ToString());

Posted 12-Nov-16 15:27pm

Member 12836145

Updated 12-Nov-16 16:44pm

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Comments

Patrice T 12-Nov-16 22:00pm

Describe tour problem or question !
What is wrong in this code ?

Member 12836145 12-Nov-16 22:09pm

It adds each new character on seperate lines to what was listed above it. Also does not include spaces between words. I have a paragraph I want encrypted to ROF13 in same formatting. How do I fix that?

Patrice T 12-Nov-16 22:17pm

Use Improve question to update your question.
So that everyone can pay attention to this information.

Philippe Mori 14-Nov-16 15:21pm

Your question is not clear. Show us what you expect and what you get.

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Patrice T · Answer 1 · 2016-11-12T16:44:00

This code is not autonomous, we have no way to test it.
Use the debugger to make sure the problem is here.
Advice: don't mess with casts

C#

result.Append(i + 13);

is enough.

You should learn to use the debugger as soon as possible. Rather than guessing what your code is doing, It is time to see your code executing and ensuring that it does what you expect.

The debugger allow you to follow the execution line by line, inspect variables and you will see that there is a point where it stop doing what you expect.
Debugger - Wikipedia, the free encyclopedia[^]
Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]

The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't find bugs, it just help you to. When the code don't do what is expected, you are close to a bug.