Passing pointer argument by reference under C?
c, c++, pointers, reference
Solution
No, C doesn't support references. It is by design. Instead of references you could use pointer to pointer in C. References are available only in C++ language.
Problem
``` #include <stdio.h> #include <stdlib.h> void getstr(char *&retstr) { char *tmp = (char *)malloc(25); strcpy(tmp, "hello,world"); retstr = tmp; } int main(void) { char *retstr; getstr(retstr); printf("%s\n", retstr); return 0; } ``` `gcc` would not compile this file, but after adding `#include <cstring>` I could use g++ to compile this source file. The problem is: does the C programming language support passing pointer argument by reference? If not, why? Thanks.