best time to use cout and printf?

Question

when is more relevent to use either, thanks!

Answer 1

general, cout is used in c++ to show something on the screen where as printf is used in c language to show something on the screen.

Answer 2

cout and printf are used for displaying message for User and the output of our program.

Answer 3

There's a speed difference between cout and printf. If you need the last 10% IO performance, use printf, if you don't, use cout (99% of the time).

Answer 4

cout is faster. printf should only be used when writing c.

Answer 5

cout is used in C++ and printf is used in C

Answer 6

cout is faster on Linux, but printf is the fastest on Windows.