Linked Questions
13 questions linked to/from 'friend' functions and << operator overloading: What is the proper way to overload an operator for a class?
0 votes
1 answer
10k views
friend function + operator overloading [duplicate]
I am working on a project for class that is a sort of payroll. Part of the prompt says "You may define a friend function that overloads << for displaying the Employee object information(i.e. ...
-1 votes
1 answer
55 views
How to overload >> or << in Template in c++ [duplicate]
I am a beginner in C++.I am trying to overload my cout operator for my template. However, it does not accept the way that i used for my classes' operators.So, i am here to learn your thoughts. This ...
2493 votes
10 answers
1.1m views
What are the basic rules and idioms for operator overloading?
Note: The answers were given in a specific order, and have received varying amounts of votes over time. Since the order of answers depends on your answer sorting preferences, here's an index of the ...
1071 votes
27 answers
508k views
What is the difference between a definition and a declaration?
The meaning of both eludes me.
262 votes
7 answers
491k views
How to separate a class and its member functions into header and source files
I am confused on how to separate implementation and declarations code of a simple class into a new header and cpp file. For example, how would I separate the code for the following class? class A2DD {...
2 votes
2 answers
6k views
Why use std::ostream and friend for << operator overloading?
I want to overload the operator << to print a list using std::cout, for example: std::cout << list //ouputs as {1,2,3,..} After searching, I came to know that this can be done using ...
5 votes
4 answers
212 views
Generic implementation of operator<< function in terms of the dump member function
All my classes implement a dump member function, e.g.: struct A { template <typename charT> std::basic_ostream<charT> & dump(std::basic_ostream<charT> &o) const {...
4 votes
3 answers
195 views
Is it obligatory to pass classes by reference in c++
I had a midterm in c++ and one of our assignments was to write a class, that overloads the << operator so that we could print private fields of that class to std::ostream, like so: Crate c1(...
3 votes
1 answer
2k views
Identifier not found error when accessing Template Class Member from Sub-Class
This is my very first question on StackOverflow. I've searched for similar "Identifier not Found" errors but couldn't find anything helpful. I'll be grateful for your help since I've been trying to ...
2 votes
3 answers
528 views
overloading the << operator in c++ [duplicate]
hey, i got something that i cannot understand ,there are two types of solutions for overloading this operator 1 is including the friend at the start of the method and the other 1 goes without the ...
0 votes
2 answers
324 views
Overloading << operator in C++ requires friend
I'm learning C++ and specifically the operator overloading. I have the following piece of code: #include <iostream> #include <string> using namespace std; class Vector2 { private: ...
2 votes
1 answer
98 views
How to properly overload the "<<" operator in C++?
I want to make a behavior like std::cout has: int a = 10, b = 15, c = 7; MyBaseClass << "a = " << a << ", b = " << b << std::endl; I try to implement some things which I'...
0 votes
1 answer
75 views
Get private element outside the class
First of all it's an exercise given to me so i can't change things and have to work with it. I have a 2d vector aka a matrix. My header file looks like this #include <vector> #include <...