Question

I am doing the following:

LRESURT CALLBACK WindowProc{
    .......
    Case VK_RETURN:
        int i;
        for ( i = 0; i <1000; i++) {
            int  size = determinesize(i);
            int *pttest = new int[size];
            .....(some work)....
            delete[] pttest;
        }
     ........
}

But I got problem when VK_RETURN occurs. If I don’t use delete[] pttest.

My question is that: Do I need to delete ptttest? When I search on google, almost everyone said that for each new, there must be a delete. Another question is that: if I put the for loop code for VK_RETURN in a function, say void whenvkreturn(), then do I need to delete pttest? Since any local variables are destroyed after returning, I guess the 1000 objects created in this loop will be deleted automatically, right? I don’t know the stack very well, so some explanation I found is not clear for me.

=====

OK, there is a vector workaround. But when it is the case:

TCHAR *text = new text[size];

What I am supposed to do?

Answer 1

You always need to delete allocated memory. For every new there should be a delete, even though it is in a function. The problem you are approaching, can easily be solved by using other containers with dynamic sizes, like std::vector. Using dynamic containers in local functions, it will automatically release the memory allocated by itself, and you don’t have to worry.