Visual c++please help...?

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How to read binary file and change it.
For example:
Every data/file in our computer have its binary source which is only 0s and 1s.
I have a binary file in which

01000100

is mostly used.i want to change

01000100

with

01100100

How can i do that in c++?

Posted 4-Feb-13 22:04pm

anonymous10

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Matthew Faithfull 5-Feb-13 4:18am

There will clearly be 3 stages to any solution.
Reading the file.
Examining and changing the data that's been read.
Writing the changed data back to the file.
I suggest you research the first stage, reading, try to adapt one of the many samples usages of istream or CFile or fread to your situation and if you can't make it work ask a specific question with some code attached to give people a good chance to help you.

anonymous10 5-Feb-13 4:35am

Can you please give me little bit code example.

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

CPallini · Accepted Answer · 2013-02-04T22:22:00

Solution 1

If you need to change the content of a file (that is overwrite it) then you have to:

Read the file content into memory.
Modify memory content.
Write back modified memory content to the original file.

You may use the C++ fstream to read/write a binary file, see, for instance Input/Output with files[^] for code samples.

You may as well use the C-like functions fopen,fwrite,fread for doing the same. See, for instance fopen[^] fwrite[^], fread[^].

Posted 4-Feb-13 22:22pm

CPallini

Comments

anonymous10 5-Feb-13 4:25am

Can you please give me little bit code example.

CPallini 5-Feb-13 4:57am

You may find code samples in the documentation pages I linked in my answer.

Albert Holguin 5-Feb-13 11:49am

Do a bit of searching online after people give you solutions... you can't expect us to spoon feed you. We post answers mostly off the top of our heads and we do it all for free because we like to help, meaning we don't like to spend a lot of time on each individual question.

Albert Holguin 5-Feb-13 11:47am

That's pretty much it... +5

Visual c++please help...?

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Visual c++please help...?

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