Question: When using Queryinterface in COM, why is the interface pointer cast to void** andwhy is it passed as a pointer to a pointer (double indirection)? Answer: This is because
Question: I have a struct: struct mystruct{ DWORD dw_Id;}*pMystruct; In the following function I want to pass the address of ‘dw_Id’ which is a member of mystruct. How do I
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Several member functions of std::string might throw exceptions. For example, if you use a very large number to specify the initial storage size, string’s constructor will throw an exception: string
Suppose you define a the following list object and you need the address of one of its elements: std::list li; std::list ::iterator iter = li.begin(); In many contexts, iter functions
It’s perfectly legal to call a member function?virtual or not?from a destructor. However, you should avoid calling a member function that accesses data members that have already been destroyed. For
On exit from a scope, destructors are called for all local automatic objects that are declared in that scope, in the reverse order of their declaration. For example: void f()
Consider the following program: int func(); main() { int n = 0; int arr [2] = { func(), n}; /* ok in C++, not in C */ } A C
A POD (plain old data) type is a union, struct or class with no user-declared constructors, no private or protected non-static data members, no base classes, and no virtual functions.