Question

IN the following C++ snippet, is a=b assigment possible ??:

unsigned int * a;
D3DCOLOR b[16];
a=(unsigned int)b;

Will this assignment copy all the elements of b array to a? Is the typecast fine?

Answer 1

First of all, it should have been:

a = (unsigned int *)b; // note the *

More importantly, this just makes a point to contents of b, and it does not copy it. If you want to copy arrays, you have to do it explicitly, for example with a for loop or std::copy, that is if you don’t want to go with classes and stuff.

Side note: to copy into a, you need memory for a! You can do it either on the stack:

unsigned int a[16]; // 16 is an example

or dynamically (for example with new).