Question

Write a C++ program where class 1 and class 2 (which is a base class) should have a derived class (class 4 and class 5). Each of the derived classes should include at least 1 variable, 2 functions (one will be showing the function overriding case, the second one will be showing the function overloading case), 2 constructors (with default values, with parameters).

Then class 3 (composition) (to relate class 1 and class 2) should include 3 variables (first variable is an object belongs to class 1, second variable is an object belongs to class 2,third variable is class 3 own variable), 3 functions.

Answer 1

code:

#include<iostream>
using namespace std;
class a1{ //base class
   public:
       void display(){ //function declarartion
          
           cout<<"In class 1 constructor"<<endl;
       }
};
class a2{ //base class
   public :
       void show1(){ //function declaration
      
           cout<<"In class 2"<<endl;
       }
};
class a4:public a1
{
  
   public:
   //default constructor of class 4
       a4(){
           cout<<"This is default constructor"<<endl;
       }
       //constructor with parameters of class 4
       a4(int z,int y){
       cout<<z;
       cout<<y;
       }
       //function overriding of calss 4
       void display(){
           cout<<"This is overriding example of class 4"<<endl;
       }
       //overloading of class 4
       void show(int a,int b){
           cout<<"This os overloading example of class 4"<<endl;
       }
};
class a5:public a2 // derived class of a2
{
   //variable in class 5
       int x=10;
  
   public:
   //default constructor of class 5
       a5(){
           cout<<"This is default constructor"<<endl;
       }
       //constructor with parameters
       a5(int z,int y){
           cout<<z<<endl;
           cout<<y<<endl;
       }
       //function overriding of class 5
       void display(){
           cout<<"This is overriding example of class 5"<<endl;
       }
       //function overloading of class 5
       void show(int a,int b){
           cout<<"This os overloading example of class 5"<<endl;
       }
       void show(int a,int b,int c){
           cout<<"This is overloading example of class 5"<<endl;
       }
  
};
class a3:public a2,public a1{ // derives class of 1 and 2
//declaring three variables in class 3
a1 one;
a2 two;
static a3 three;
public:
void func1(){
cout<<"Function 1 in class 3"<<endl;
}
void func2(){
cout<<"THis is function 2 in class 3"<<endl;
}
void func3(){
cout<<"This is function 3 in class 3"<<endl;
}
};
int main(){
//creating object of class 3
a3 obj;
//calling functions of class 3
obj.func1();
obj.func2();
obj.func3();
//creatinf object of class 5
a5 obj1;
//calling show function of class 5
obj1.show(2,3,4);
  
}

output:

code screenshot:

Note:Please see code screenshot for understanding indentation of the code