I am a C guy and I'm trying to understand some C++ code. I have the following function declaration:

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 · 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 …

I have been seeing code like this usually in the start of header files: #ifndef HEADERFILE_H #define HEADERFILE_H And at the end of the file is #endif What is the purpose of this?

12 The GNU C++ compiler has to make a decision where to put the vtable in case you have the definition of the virtual functions of an object spread across multiple compilations units (e.g. …

itoa will be faster than the stream equivalent. There are also ways of re-using the string buffer with the itoa method (avoiding heap allocations if you are frequently generating strings. e.g. for …

auto was a keyword that C++ "inherited" from C that had been there nearly forever, but virtually never used because there were only two possible conditions: either it wasn't allowed, or else it …

Nov 13, 2009 · I want to use the PI constant and trigonometric functions in some C++ program. I get the trigonometric functions with include &lt;math.h&gt;. However, there doesn't seem to be …

Constructors are not inherited. They are called implicitly or explicitly by the child constructor. The compiler creates a default constructor (one with no arguments) and a default copy constructor …

Jan 30, 2009 · Have to recompile foo.cpp every time we change any other file in the program, in case it added a new novel instantiation of MyClass<T> Require that baz.cpp contains …