Swift program to implement hierarchical inheritance

Program/Source Code:

The source code to implement hierarchical inheritance is given below. The given program is compiled and executed successfully.

// Swift program to implement hierarchical inheritance

import Swift

class Person {
    var name: String = ""
    var age: Int = 0

    func setPerson(name: String, age: Int) {
        self.name = name
        self.age = age
    }

    func printPerson() {
        print("\tName: ", name)
        print("\tAge : ", age)
    }
}

class Employee : Person {
    var empId: Int = 0

    func setEmp(id: Int, name: String, age: Int) {
        empId = id
        setPerson(name:name, age:age)
    }

    func printEmp() {
        print("\tEmployee Id  : ", empId)
        printPerson()
    }
}

class Student : Person {
    var stuId: Int = 0
    var fees: Float = 0

    func setStudent(id: Int, name: String, age: Int, fee: Float) {
        stuId = id
        fees = fee
        setPerson(name:name, age:age)
    }

    func printStudent() {
        print("\tStudent Id: ", stuId)
        printPerson()
        print("\tFees: ", fees)
    }
}

var emp = Employee()
var stu = Student()

emp.setEmp(id:101, name:"Arun", age:23)
stu.setStudent(id:1001, name:"Amit", age:15,fee:25000.56)

print("Employee Information:")
emp.printEmp()

print("Student Information:")
stu.printStudent()

Output:

Employee Information:
        Employee Id  :  101
        Name:  Arun
        Age :  23
Student Information:
        Student Id:  1001
        Name:  Amit
        Age :  15
        Fees:  25000.56

...Program finished with exit code 0
Press ENTER to exit console.

Explanation:

In the above program, we imported a package Swift to use the print() function using the below statement,

import Swift

Here, we created three classes Person, Employee and Student.

The "Person" class contains data member "Name" and "Age". The "Employee" class contains a data member's "empId. The Student class contains two data members stuId and fees.

All classes contain methods to set and print data members. Then we inherited the Person class into Employee and Student classes. After that, we created the objects of Employee and Student  classes and set and print information on the console screen.