Employees and managers – OOP in C++ Practice Problem

An Employee has a name and a monthly salary; pay() returns the salary. A Manager is an Employee with a bonus; its pay() returns salary plus bonus. Complete Manager and print what each person earns.

What to build

A Manager class derived from Employee that adds a bonus to the pay.

Requirements

Derive Manager publicly from Employee.
Pass the name and salary to the Employee constructor.
Make the manager's pay() return the salary plus the bonus.

Input

The first line has n (1 ≤ n ≤ 100). Each of the next n lines is E name salary or M name salary bonus (whole numbers up to 1,000,000).

Output

One line per person: NAME earns PAY.

Constraints

1 ≤ n ≤ 100, and the amounts are whole numbers up to 1,000,000.

Example

Input:

2
E Rahim 30000
M Nadia 50000 10000

Output:

Rahim earns 30000
Nadia earns 60000

Why it works

A manager is an employee, so it inherits the name and salary. Only the pay rule differs, so that is the only part Manager adds.

Examples

Example 1 · Input

2
E Rahim 30000
M Nadia 50000 10000

Expected output

Rahim earns 30000
Nadia earns 60000

Example 2 · Input

1
E Karim 0

Expected output

Karim earns 0

Hints

Hint 1

Manager derives from Employee: class Manager : public Employee.

Hint 2

Its constructor passes name and salary to Employee's: Manager(string n, int s, int b) : Employee(n, s), bonus(b) {}

Hint 3

Make salary protected so Manager::pay can use it.

Solution

Show one correct solution (try it yourself first)

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

class Employee {
protected:
    string name;
    int salary;
public:
    Employee(string n, int s) : name(n), salary(s) {}
    string getName() const { return name; }
    int pay() const { return salary; }
};

class Manager : public Employee {
    int bonus;
public:
    Manager(string n, int s, int b) : Employee(n, s), bonus(b) {}
    int pay() const { return salary + bonus; }
};

int main() {
    int n;
    cin >> n;
    for (int i = 0; i < n; i++) {
        string kind, name;
        int salary;
        cin >> kind >> name >> salary;
        if (kind == "M") {
            int bonus;
            cin >> bonus;
            Manager m(name, salary, bonus);
            cout << m.getName() << " earns " << m.pay() << endl;
        } else {
            Employee e(name, salary);
            cout << e.getName() << " earns " << e.pay() << endl;
        }
    }
    return 0;
}

Lesson: Inheritance →