C matrices: what to return ?

[centrecmercial]

Hello everyone I need to get some help on my matrices functions.
Anyone wanting to help me (will not take more than 10 minutes), please send me a private message (because I cannot display the functions here for readability). The thing is that I have a print_matrix function and a transpose_matrix function, which are both void. How can I use print_matrix on transpose_matrix if there is no return in transpose_matrix ? what should print_matrix take as argument ? Send me a private message if you have an idea I will send you the whole subject) but since I am a beginner it should not take you more a than 10 min I think it is evident

[Salem]

You pass the output matrix as a parameter to transpose_matrix.