Difference between \015 & \012 and \r & \n

Question

I have an old C++ program that is writing files and FTPing them to a IBM mainframe.

This program is being converted to C#.

Things seems OK in transferring but the mainframe viewer is not displaying the file properly.

What is the difference between \015 & \012 and \r & \n? C++ is using the numbers and C# is using \r\n.

Could this be why things don't appear properly?

The files are getting transferred as ASCII so unsure why it appears like garbage!

Solution 1

\015 is an octal literal, which C# does not support.
C# parses it as \0 (character code zero) followed by the two characters 15

Solution 2

There is no difference between \r\n and \015\012.

In C(++), the \0XX escape sequence denotes a literal octal representation of a char. If you print these values as numbers, you should see that \r equates to 13 and \n equates to 10.

Octal is base 8, and when converted to base 10, 015 equates to 13, and 012 equates to 10. I hope that clears things up.

Comments

[Bo Persson]

There is a difference on the mainframe end though, which might explain the original source using explicit numbers.

[Jon]

Would the IBM Mainframe not interpret \r \n hence the garbarge loooking file?

[Kaslai]

Yes, I suppose that's somewhat logical. Modern day standards are well, modern, so it would stand to reason that an old application wasn't privy to such things as \r\n (cross-compiling, maybe?), and thus had to use literals.