C++ boost::operators::addable














































C++ boost::operators::addable



Description:-

boost::operator:: addable function used to add the operands.

Header file:-

#include <boost/operators.hpp>

Syntax:-

T operator+(const T&, const T&)

where,

T is the return type of the function, T maybe the class name/structure name /template name,

operator is the keyword,

+ is used for addition,

const T&, const T&:-they are the two objects of templates/class/structure. We need two parameters to add that's                                            why we are passing two  parameters in form of objects.

Sample code:-

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#include <boost/operators.hpp>
#include<boost/iterator.hpp>
#include <string>
#include <utility>
#include <iostream>
struct num : public boost::addable<num>
{
  int n; //number
  num(int l) : n(l) {}
//adding the numbers
  num operator+(const num &a) const{ return n + a.n; }
};

int main()
{
passing the parameters
  num a1(3);
  num a2(8);
 //print the output
  std::cout << std::dec << (a1.n + a2.n) << '\n';
}

Output:-

11


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