Class in C++ – Hacker Rank Solution | HackerRank Programming Solutions | HackerRank C++ Solutions

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C++ Prorgramming Solutions

Hello Programmers/Coders, Today we are going to share solutions of Programming problems of HackerRank of Programming Language C++ . At Each Problem with Successful submission with all Test Cases Passed, you will get an score or marks. And after solving maximum problems, you will be getting stars. This will highlight you profile to the recruiters.

In this post, you will find the solution for Class in C++-HackerRank Problem. We are providing the correct and tested solutions of coding problems present on HackerRank. If you are not able to solve any problem, then you can take help from our Blog/website.

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Introduction To C++

C++ is a general-purpose programming language that was developed as an enhancement of the C language to include object-oriented paradigm. It is an imperative and a compiled language. 

C++ is a middle-level language rendering it the advantage of programming low-level (drivers, kernels) and even higher-level applications (games, GUI, desktop apps etc.). The basic syntax and code structure of both C and C++ are the same. 

C++ programming language was developed in 1980 by Bjarne Stroustrup at bell laboratories of AT&T (American Telephone & Telegraph), located in U.S.A. Bjarne Stroustrup is known as the founder of C++ language.

Class in C++  Hackerrank Solution

Problem

Classes in C++ are user defined types declared with keyword class that has data and functions . Although classes and structures have the same type of functionality, there are some basic differences. The data members of a class are private by default and the members of a structure are public by default. Along with storing multiple data in a common block, it also assigns some functions (known as methods) to manipulate/access them. It serves as the building block of Object Oriented Programming.
It also has access specifiers, which restrict the access of member elements. The primarily used ones are the following:

  • public: Public members (variables, methods) can be accessed from anywhere the code is visible.
  • private: Private members can be accessed only by other member functions, and it can not be accessed outside of class.

Class can be represented in the form of

class ClassName {
    access_specifier1:
        type1 val1;
        type2 val2;
        ret_type1 method1(type_arg1 arg1, type_arg2 arg2,...)
        ...
    access_specifier2:
        type3 val3;
        type4 val4;
        ret_type2 method2(type_arg3 arg3, type_arg4 arg4,...)
        ...
};

It’s a common practice to make all variables private, and set/get them using public methods. For example:

class SampleClass {
    private:
        int val;
    public:
        void set(int a) {
            val = a;
        }
        int get() {
            return val;
        }
};

Input Format

Input will consist of four lines.
The first line will contain an integer, representing the age. The second line will contain a string, consisting of lower-case Latin characters (‘a’-‘z’), representing the first_name of a student.
The third line will contain another string, consisting of lower-case Latin characters (‘a’-‘z’), representing the last_name of a student. The fourth line will contain an integer, representing the standard of student.

Note: The number of characters in first_name and last_name will not exceed 50.

Output Format

The code provided by HackerRank will use your class members to set and then get the elements of the Student class.

Sample Input

15
john
carmack
10

Sample Output

15
carmack, john
10

15,john,carmack,10
Class in C++ – Hacker Rank Solution
#include <iostream>
#include <sstream>
using namespace std;

class Student {
    private:
        int age;
        string first_name;
        string last_name;
        int standard;
    public:
        void set_age(int a) 
        {
            age = a;
        }
        int get_age() 
        {
            return age;
        }

        void set_first_name(string fn) 
        {
            first_name = fn;
        }
        string get_first_name() 
        {
            return first_name;
        }

        void set_last_name(string ln) 
        {
            last_name = ln;
        }
        string get_last_name() 
        {
            return last_name;
        }

        void set_standard(int s) 
        {
            standard = s;
        }
        int get_standard() 
        {
            return standard;
        }

        string to_string() 
        {
            stringstream ss;
            ss << age << "," << first_name << "," << last_name << "," << standard;
            return ss.str();
        }
};

int main() {
    int age, standard;
    string first_name, last_name;
    
    cin >> age >> first_name >> last_name >> standard;
    
    Student st;
    st.set_age(age);
    st.set_standard(standard);
    st.set_first_name(first_name);
    st.set_last_name(last_name);
    
    cout << st.get_age() << "\n";
    cout << st.get_last_name() << ", " << st.get_first_name() << "\n";
    cout << st.get_standard() << "\n";
    cout << "\n";
    cout << st.to_string();
    
    return 0;
}

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