Thread: Encryption using bitwise operator in C

Originally Posted by laserlight

You shouldn't open three files at once when you only need two at that time: the first for reading and the second for writing. After closing those two files, when you need to open the second file again for reading, you can then do that.

Also, ch is still a char when it should be an int, as mentioned by Click_here in post #3.

And honestly, just call it "encryption" if you will. As I noted in post #8, in a cryptographic context, the use of "code" and "encoding" here is inappropriate as it refers to a different though related concept: it is a simple substitution cipher, as exceedingly simple as it may be.

Originally Posted by laserlight

You shouldn't open three files at once when you only need two at that time: the first for reading and the second for writing. After closing those two files, when you need to open the second file again for reading, you can then do that.

Also, ch is still a char when it should be an int, as mentioned by Click_here in post #3.

And honestly, just call it "encryption" if you will. As I noted in post #8, in a cryptographic context, the use of "code" and "encoding" here is inappropriate as it refers to a different though related concept: it is a simple substitution cipher, as exceedingly simple as it may be.

OK. I actually tried this program with another way too by opening two files i.e. fp and ft then closing both and removing the fp and then renaming the ft as fp. But in this process I was not being able to observe all three files status.

Originally Posted by laserlight

If you use flp1969's example including the sample command line snippet, it's not supposed to display anything to screen. Did you check the files?

Yup! files are in same status as I have shown in post # 10