Overloading Ostream Operator in C++ Hacker Rank Solution

Hello coders, In this post, you will learn how to solve the Overloading Ostream Operator in C++ Hacker Rank Solution. This problem is a part of the HackerRank C++ Programming Series.

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Overloading Ostream Operator in C++ Hacker Rank Solution
Overloading Ostream Operator in C++ – Hacker Rank Solution

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Overloading Ostream Operator in C++ Hacker Rank Solution


The task is to overload the << operator for Person class in such a way that for p being an instance of class Person the result of:

std::cout << p << " " << <some_string_value> << std::endl;

produces the following output:

first_name=<first_name>,last_name=<last_name> <some_string_value>


  • <first_name> is the value of p’s first_name_
  • <last_name> is the value of p’s last_name_
  • <some_string_value> is an arbitrary std::string value

Input Format :

The input is read by the provided locked code template. In the only line of the input there are 3 space-separated strings first_name, last_name, event. The values of first_name and last_name will be used to create an object p of type Person. The value of event will be used by the provided code to produce the output.

Constraints :

Each word in the input contains only English letters and is no longer than 15 characters

Output Format :

The output should be produced by the provided locked code template. This code will use the implementation of Person public methods and the overloaded << operator to produce the output. Specifically, the output wiil be produced by the following code:

cout << p << " " << event << endl;

Sample Input :

john doe registered

Sample Output :

first_name=john,last_name=doe registered

Overloading Ostream Operator in C++ – Hacker Rank Solution

#include <iostream>
using namespace std;
class Person
    Person(const string& first_name, const string& last_name) : first_name_(first_name), last_name_(last_name) {}
    const string& get_first_name() const
      return first_name_;
    const string& get_last_name() const
      return last_name_;
    string first_name_;
    string last_name_;
// Enter your code here.
/* Overloading Ostream Operator in C++ - Hacker Rank Solution START */
ostream& operator<<(ostream& Output, Person& p)
  Output << "first_name=" << p.get_first_name() << ","
         << "last_name=" << p.get_last_name();
  return Output;
/* Overloading Ostream Operator in C++ - Hacker Rank Solution END */
int main()
    string first_name, last_name, event;
    cin >> first_name >> last_name >> event;
    auto p = Person(first_name, last_name);
    cout << p << " " << event << endl;
    return 0;

Disclaimer: The above Problem (Overloading Ostream Operator in C++ ) is generated by Hackerrank but the Solution is Provided by Chase2Learn. This tutorial is only for Educational and Learning purposes. Authority if any of the queries regarding this post or website fill the following contact form thank you.


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HackerRank is a tech company that focuses on competitive programming challenges for both consumers and businesses. Developers compete by writing programs according to provided specifications. Wikipedia

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C++ is a general-purpose programming language created by Danish computer scientist Bjarne Stroustrup as an extension of the C programming language, or “C with Classes”. Wikipedia

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