Passing pointer argument by reference under C?

Question

#include 
#include 

void
getstr(char *&retstr)
{
 char *tmp = (char *)malloc(25);
 strcpy(tmp, \"hello,world\");
 retstr = tmp;
}         


        

Answer 1

C lang does not have reference variables but its part of C++ lang.

The reason of introducing reference is to avoid dangling pointers and pre-checking for pointers nullity.

You can consider reference as constant pointer i.e. const pointer can only point to data it has been initialized to point.