What does '&' do in a C++ declaration? - Stack Overflow
I am a C guy and I'm trying to understand some C++ code. I have the following function declaration:
What is the <=> ("spaceship", three-way comparison) operator in …
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 …
How to use the PI constant in C++ - Stack Overflow
Nov 13, 2009 · I want to use the PI constant and trigonometric functions in some C++ program. I get the trigonometric functions with include <math.h>. However, there doesn't seem to be …
What is the purpose of using #ifdef and #if in C++?
In my project code, I found that someone used #ifdef and #if in code. I would like to know what does purpose for using them? As my knowledge, it said to the preprocessor will not do …
how does the ampersand(&) sign work in c++? - Stack Overflow
Possible Duplicate: What are the differences between pointer variable and reference variable in C++? This is confusing me: class CDummy { public: int isitme (CDummy& param); }; int …
c++ - Inheriting constructors - Stack Overflow
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 …
What does the "::" mean in C++? - Stack Overflow
Sep 9, 2023 · 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 …
How do you add a timed delay to a C++ program? - Stack Overflow
Sep 12, 2014 · I am trying to add a timed delay in a C++ program, and was wondering if anyone has any suggestions on what I can try or information I can look at? I wish I had more details on …
Check if a string contains a string in C++ - Stack Overflow
Feb 26, 2010 · I have a variable of type std::string. I want to check if it contains a certain std::string. How would I do that? Is there a function that returns true if the string is found, and …
What does the question mark character ('?') mean in C++?
int qempty() { return (f == r ? 1 : 0); } In the above snippet, what does "?" mean? What can we replace it with?