Length of float changes between 32 and 40 bit

Question

I encountered an odd problem when exporting float values to a file. I would expect every float to be of the same length (obviously), but my programme sometimes

Answer 1

You're not writing text; you're writing binary data... However, your file is open for writing text ("w") instead of writing binary ("wb"). Hence, fwrite() is translating '\n' to "\r\n".

Change this:

if (!fopen_s(&outputFile, fileName, "w")) 

To this:

if (!fopen_s(&outputFile, fileName, "wb")) 

In "wb", the b stands for binary mode.

Answer 2

The problem is that on Windows, you have to differentiate between text and binary files. You have the file opened as text, which means 0d (carriage-return) is inserted before every 0a (line-feed) written. Open the file like this:

if (!fopen_s(&outputFile, fileName, "wb"))

The rest as before, and it should work.