f2 is taking it's arguments by reference, which is essentially an alias for the arguments you pass. The difference between pointer and reference is that a reference cannot be NULL.

2012年9月5日 · function takes a single parameter, mynumber which is a reference to a pointer to an int. This is useful when you need to pass a pointer to a function, and that function might …

Possible Duplicate: What does T&& mean in C++0x? I had never seen a double ampersand before I read this answer. The code snippet in question is this: template …

2011年8月1日 · The function accepts the parameter as a non-const pointer to an UINT. This means it may modify it. The function can access the value you gave to the parameter by …

With: addNode( node *&head, int value) ...the type of head is "reference to pointer-to-node".. With: addNode(node **head, int value)

2010年4月2日 · The problem I see with learning C++ with pointers from day 1 is that you suddenly have to ways of doing similar things, and suddenly when should I prefer one over the other …

So generally, if you want to use an output parameter (or a pointer/reference in general) in a C++ function, and passing a null value to that parameter should be allowed, then use a pointer (or …

Unused parameter warnings can simply be suppressed by passing -Wno-unused-parameter to the compiler, but note that this disabling flag must come after any possible enabling flags for this …

&& is new in C++11. int&& a means "a" is an r-value reference. && is normally only used to declare a parameter of a function. And it only takes a r-value expression. If you don't know …

2011年7月4日 · How to pass a multidimensional array to a function in C++ only, via std::vector<std::vector<int>>& Passing 1D arrays as function parameters in C (and C++) 1. …