HackerRank Class solution in c++ programming

In this HackerRank class problem in c++ programming language, You have to create a class, named Student, representing the student's details, as mentioned above, and store the data of a student. Create setter and getter functions for each element; that is, the class should at least have the following functions:

1. get_age, set_age
2. get_first_name, set_first_name
3. get_last_name, set_last_name
4. get_standard, set_standard

Also, you have to create another method to_string() which returns the string consisting of the above elements, separated by a comma(,). 

HackerRank Class problem solution in c++ programming.

#include <iostream>
#include <sstream>
using namespace std;

class Student{
    int age;
    int standard;
    string first_name;
    string last_name;
public:
    Student()
    {
        age = 0;
        standard = 0;
        first_name.clear();
        last_name.clear();
    }
    void set_age(int newAge)
    {
        age = newAge;
    }
    void set_standard(int newStandard)
    {
        standard = newStandard;
    }
    void set_first_name(string newFirst_name)
    {
        first_name = newFirst_name;
    }
    void set_last_name(string newLast_name)
    {
        last_name = newLast_name;
    }
    int get_age() {return age;}
    int get_standard() {return standard;}
    string get_first_name() {return first_name;}
    string get_last_name() {return last_name;}
    
    string to_string()
    {
        stringstream ss;
        char c = ',';
        ss << age << c << first_name << c << last_name << c << 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;
}

Second solution

#include <iostream>
#include <sstream>
using namespace std;

/*
Enter code for class Student here.
Read statement for specification.
*/
class Student{
    public:
        int age, standard;
        string first_name, last_name;
        void set_age(int a){
            age = a;
        }
        void set_first_name(string a){
            first_name = a;
        }
        void set_last_name(string a){
            last_name = a;
        }
        void set_standard(int a){
            standard = a;
        }
        int get_age(){
            return age;
        }
        string get_first_name(){
            return first_name;
        }
        string get_last_name(){
            return last_name;
        }
        int get_standard(){
            return standard;
        }
	   string t_string(){
           string s = "";
           s+=to_string(age);
           s+=",";
           s+=first_name;
           s+=",";
           s+=last_name;
           s+=",";
           s+=to_string(standard);
           return s;
	   }
};

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.t_string();
    
    return 0;
}