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Swift program to implement hybrid inheritance

Here, we are going to learn how to implement hybrid inheritance in Swift programming language?
Last Updated : July 14, 2021

Problem Solution

Here, we will implement hybrid inheritance by combining two types of inheritances. In our case, we will combine hierarchical and multilevel inheritances.

Program/Source Code

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

// Swift program to implement hybrid inheritance

import Swift

class A {
    var numA: Int = 0

    func setA(n: Int) {
        numA = n
    }

    func printA() {
        print("numA: ", numA)
    }
}

class B : A {
    var numB: Int = 0

    func setB(n: Int) {
        numB = n
    }

    func printB() {
        print("numB: ", numB)
    }
}

class C : B {
    var numC: Int = 0

    func setC(n: Int) {
        numC = n
    }

    func printC() {
        print("numC: ", numC)
    }
}

class D : A {
    var numD: Int = 0

    func setD(n: Int) {
        numD = n
    }

    func printD() {
        print("numD: ", numD)
    }
}

var obj1 = C()
var obj2 = D()

obj1.setA(n:10)
obj1.setB(n:20)
obj1.setC(n:30)

obj1.printA()
obj1.printB()
obj1.printC()

obj2.setA(n:40)
obj2.setD(n:50)

obj2.printA()
obj2.printD()

Output

numA:  10
numB:  20
numC:  30
numA:  40
numD:  50

...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 five classes A, B, C, D, E. And, we inherited class A into B and D classes. The class B is inherited into C. Then we created the objects of the C and D classes and then set and print values on the console screen.