Difference between fprintf and fwrite?

Hello, I am using a serial communication and I want to send some data. I was wondering what is the actual difference between the fprintf and fwrite function? Thanks!

Answer 1

[Azzi Abdelmalek]

• fprintf, write data to text file
• fwrite, write data to binary file

[David J. Mack]

To be really precise, fprintf writes data in text, fwrite in binary format, but both functions can write to the same (mixed-type) file.

Answer 2

[Sachin Ganjare]

fprintf blocks the command line to execute other commands while the data is getting transferred while fwrite doesn't.

[Ivana]

Ok, so what if I want the program to run as fast as possible? Which one shall I use then?

[Sachin Ganjare]

fprintf() is slow, because it does formatting. Writing one character at a time is slow in any case.

[Sachin Ganjare]

Also refer below link:

http://bobobobo.wordpress.com/2008/02/07/speed-tests-fprintf-vs-ofstream-and-fprintf-vs-fwrite/

Hope it helps!!!

[Ivana]

Thanks!!! :)