nameWithAgeUsingClass.cpp

// CLASS
#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() << endl;
    return 0;
}