A student is a person – OOP in C++ Practice Problem

Reuse a class by building a new one on top of it.

What to build

A Student class derived from Person, which adds an ID.

Requirements

Person keeps the name and has introduce(), which prints I am NAME.
Student derives publicly from Person, adds an ID and has showId(), which prints My ID is ID.
For each student, call both functions on the same Student object.

Input

The first line has q. Each of the next q lines has a name and an ID.

Output

Two lines per student.

Constraints

1 ≤ q ≤ 100, names are one word, and IDs are from 0 to 1000000.

Example

Input:

2
Asha 101
Bilal 202

Output:

I am Asha
My ID is 101
I am Bilal
My ID is 202

Why it works

A Student contains a Person part, so it can call introduce() without any new code. Only what is new, the ID, is written in Student.

Examples

Example 1 · Input

2
Asha 101
Bilal 202

Expected output

I am Asha
My ID is 101
I am Bilal
My ID is 202

Example 2 · Input

1
X 0

Expected output

I am X
My ID is 0

Hints

Hint 1

`class Student : public Person` gives every Student the Person part.

Hint 2

The Student constructor passes the name on: `Student(string n, int i) : Person(n), id(i) {}`.

Solution

Show one correct solution (try it yourself first)

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

class Person {
protected:
    string name;
public:
    Person(string n) : name(n) {}
    void introduce() const {
        cout << "I am " << name << endl;
    }
};

class Student : public Person {
    int id;
public:
    Student(string n, int i) : Person(n), id(i) {}
    void showId() const {
        cout << "My ID is " << id << endl;
    }
};

int main() {
    int q;
    cin >> q;
    while (q-- > 0) {
        string name;
        int id;
        cin >> name >> id;
        Student s(name, id);
        s.introduce();
        s.showId();
    }
    return 0;
}

Lesson: Inheritance →