Operator overloading

In Operator Overloading we define a new meaning for a C ++ operator. This also changes the way the operator works. For example, the + operator can be used to concatenate two strings.

#include <iostream>
using namespace std;

class StringConcatenation {
    private:
        string str;

    public:
        StringConcatenation(string s) {
            str = s;
        }

        StringConcatenation operator+(StringConcatenation const &obj) {
            StringConcatenation result = str + obj.str;

            return result;
        }

        void print() {
            cout << str << endl;
        }
};

int main() {
    StringConcatenation obj1("Hello"), obj2("World");
    StringConcatenation obj3 = obj1 + obj2;

    obj3.print();

    return 0;
}

Output

Hello World