I am trying to understand what it means when a variable or a function is static, but still not sure as to what it is. I understand this theoratically, but not sure as to how to when I should use this and how to apply this even in OOP when using the :: symbol?

C++ for Engineers and Scientists
4th Edition
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Bronson, Gary J.
Chapter12: Adding Functionality To Your Classes
Section12.2: Providing Class Conversion Capabilities
Problem 2E
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I am trying to understand what it means when a variable or a function is static, but still not sure as to what it is. I understand this theoratically, but not sure as to how to when I should use this and how to apply this even in OOP when using the :: symbol?

 

For example

class Box{

static string set_name(string n);

};

 

main.cpp

#include "Box.h"

#include <iostream>

 

int main(){

        cout << Box::set_name("my_name") << endl;

}

 

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