How do I make ptr_1 pointing to the same address of ptr_2 after function_B is called? I tried doing this, but after function_B exits, ptr_1 points back to NULL. Thanks!
Code:void cluster::function_A(void) { int *ptr_1, *ptr_2; ptr_1 = NULL; ptr_2 = new int [ 10 ]; function_B(ptr_1, ptr_2); } void cluster::function_B(int *ptr_1, int *ptr_2) { ptr_1 = ptr_2; }
Pass ptr_1 by reference.
Look up a C++ Reference and learn How To Ask Questions The Smart WayOriginally Posted by Bjarne Stroustrup (2000-10-14)
ok, i get it, i do this right?
Code:void cluster::function_B(int *&ptr_1, int *&ptr_2) { ptr_1 = ptr_2; }
Yes, though in this example you do not need to pass ptr_2 by reference as it is not modified. Of course, this example is so simple that one would just write the assignment instead of calling the function
Look up a C++ Reference and learn How To Ask Questions The Smart Way
ok, thanks a lot for guiding me, i found an excellent article on this issue =)
http://www.codeproject.com/cpp/PtrToPtr.asp
