Freeing malloc will not erase char data

Question

I made a smaller scenario of my bigger problem. What I try to do is pass a string to a function which will make a new string out of it. However I ran into some problems.

Answer 1

Try changing

strcat(buff, "."); 

into

strcpy(buff, "."); 

Or alternativly initialise buff when declaring it like so:

 char buff[1024] = "";