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 …

Jan 18, 2012 · What does the |= operator mean in C++?Assuming you are using built-in operators on integers, or sanely overloaded operators for user-defined classes, these are the same: a = …

The & operator does the same thing in C and C++: it takes the address of an object. The & in a function prototype is not an operator. I'll fix the title.

Oct 2, 2024 · in C++ expression a % b returns remainder of division of a by b (if they are positive. For negative numbers sign of result is implementation defined). For example: 5 % 2 = 1 13 % …

foo->bar() is the same as (*foo).bar(). The parenthesizes above are necessary because of the binding strength of the * and . operators. *foo.bar() wouldn't work because Dot (.) operator is …

95 .cpp is the recommended extension for C++ as far as I know. Some people even recommend using .hpp for C++ headers, just to differentiate from C. Although the compiler doesn't care …

Nov 24, 2017 · The <=> token is introduced. The character sequence <=> tokenizes to <= >, in old source code. For example, X<&Y::operator<=> needs to add a space to retain its meaning. …

I found this line of a code in a class which I have to modify: ::Configuration * tmpCo = m_configurationDB;//pointer to current db and I don't know what exactly means the double …

const functions can help speed. If the compiler doesn't see the function's implementation (its defined in the cpp file, or calls functions defined in the cpp file), then it doesn't know which …

Nov 19, 2012 · Distribution issues aside, keep in mind that with random numbers comes the possibility of getting the same result several times in a row. If you were guaranteed not to get …