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, tell the compiler where to look) with ::.
Let's say that I need to format the output of an array to display a fixed number of elements per line. How do I go about doing that using modulo operation? Using C++, the code below works for displ...
So called "pointers" to members in C++ are more like offsets, internally. You need both such a member "pointer", and an object, to reference the member in the object. But member "pointers" are used with pointer syntax, hence the name. There are two ways you can have an object at hand: you have a reference to the object, or you have a pointer to the object. For the reference, use .* to combine ...
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 colon prepended to...
This is called the three-way comparison operator. According to the P0515 paper proposal: There’s a new three-way comparison operator, <=>. The expression a <=> b returns an object that compares <0 if a < b, compares >0 if a > b, and compares ==0 if a and b are equal/equivalent. To write all comparisons for your type, just write operator<=> that returns the appropriate category type: Return ...
What does this symbol mean? AirlineTicket::AirlineTicket ()@PaulR Not everyone who arrives upon this question is looking to learn C++. I, for example, just happened to be skimming some C++ code and wanted to get the general idea of what the program is doing and needed a quick reference :)
0 To format cpp files in vscode, the file must be saved as a cpp file first. Formatting javascript/java code works as expected with out the file being saved. C++ utilities seem to be buggy.
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 what you do, it's personal preference.
