C++ and C are used heavily in embedded systems since one can have deterministic control of memory and other scarce resources. I think most games (well at least the games I play) are still written in C++, probably because there exists large frameworks written in C++ which have been fully tested and are very capable.

I have a cross platform application and in a few of my functions not all the values passed to functions are utilised. Hence I get a warning from GCC telling me that there are unused variables. What

2022年4月22日 · The use of both operators can be replaced since C++17 by the std::invoke function template. std::invoke provides a unified way of dereferencing member pointers regardless of whether you use them in combination with an object or an object pointer, and also regardless of whether the pointer to member corresponds to a pointer to data member or ...

Possible Duplicate: Is excessive use of this in C++ a code smell When should you use the "this" keyword in C++? Is there any reason to use this-> In C++, is the keyword this usually omitted?...

2015年7月26日 · Attribute used is helpful in situation when you want to force compiler to emit symbol, when normally it may be omitted. As GCC's documentation says (emphasis mine): For instance, if you have code as follows: #include <iostream> static int foo(int a, int b) { return a + b; } int main() { int result = 0; // some inline assembly that calls foo and ...

The -> operator is used when we are working with a pointer and the dot is used otherwise. So if we have a struct class like: struct class{ int num_students; int yr_grad; }; and we have an instance of a class* curr_class (class pointer), then to get access to number of students we would do cout << curr_class->num_students << endl;

2011年2月13日 · The three distinct operators C++ uses to access the members of a class or class object, namely the double colon ::, the dot ., and the arrow ->, are used for three different scenarios that are always well-defined. Knowing this allows you to immediately know quite a lot about a and b just by looking at a::b, a.b, or a->b, respectively, in any code you look at. a::b is …

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 smart pointer, preferably).

A fine question, but a little too broad (IMO). That's called the scope-resolution operator, and your search term for further learning is scope. All those names (cout, member functions of A) are defined in scopes and you have to resolve the scope (that is, …

This is C++/CLI and the caret is the managed equivalent of a * (pointer) which in C++/CLI terminology is called a 'handle' to a 'reference type' (since you can still have unmanaged pointers). (Thanks to Aardvark for pointing out the better terminology.)