function overloading

 

# include<iostream>

using namespace std;

int area(int side)

{

 return side*side;

}

int area(int l , int b)

{

 return l*b;

}

int main()

{

        int (*p1)(int);

        int (*p2)(int,int);

        p1=area;

        p2=area;

        cout<<"Address of area(int)="<<p1<<endl;

        cout<<"Address of area(int,int)="<<p2<<endl;

        cout<<"\n";

        cout<<"Invoking area(int) via p1 "<<p1(20)<<endl;

        cout<<"Invoking area(int,int) via p2 "<<p2(10,20);

        return 0;

}

Hierarchical Inheritance Example.

👇👆👆👆👆👇👇👇👇👇

#include<iostream>

using namespace std;

class Shape

{

protected:

 float width, height;

public:

 void set_data (float a, float b)

 {

  width = a;

  height = b;

 }

};

//inheriting Shape class

class Rectangle: public Shape

{

public:

 float area ()

 {

  return (width * height);

 }

};

//inheriting Shape class

class Triangle: public Shape

{

    public:

        float area ()

        {

            return (width * height / 2);

        }

};

int main ()

{

 Rectangle rect;

 Triangle tri;

 rect.set_data (5,3);

 tri.set_data (2,5);

 cout <<"Area of Rectangle : " <<rect.area() << endl;

 cout <<"Area of Triangle : "<< tri.area() << endl;

 return 0;

}

 

Hybrid Inheritance Example.

 

 

#include<iostream>

using namespace std;

class A

{

    public:

        int l;

        void len()

        {

           cout<<"Lenght : ";

           cin>>l;

        }

};

class B : public A

{

    public:

        int b,c;

       void l_into_b()

       {

           len();

           cout<<"Breadth : ";

           cin>>b;

           c=b*l;

       }

};

class C

{

    public:

        int h;

        void height()

        {

           cout<<"Height : ";

           cin>>h;

        }

};

//Hybrid Inheritance Level

class D : public B , public C

{

    public:

        int res;

        void result()

        {

           l_into_b();

           height();

           res=h*c;

           cout<<"\n";

           cout<<endl<<"Result (l*b*h) : "<<res;

        }

};

int main()

{

    D dObj;

    dObj.result();

    return 0;

}

Merge singly linked list.

#include <iostream>

#include <cstdlib>

using namespace std;

typedef struct linked_list

{

    int data;

    struct linked_list *next;

}

Linked_list;

//for adding node

int add_node(Linked_list **head, int d)

{

    Linked_list *l = new Linked_list;

    if(l == NULL) return 0;

    Linked_list *t = *head;

    l->data = d;

    l->next = NULL;

    if(*head == NULL)

    {

        *head = l;

        return 1;

    }

    while(t->next != NULL)

    {

        t = t->next;

    }

    t->next = l;

    return 1;

}

//print the value which are there in linked list

void print_list(Linked_list *head)

{

    while(head != NULL)

    {

        cout << head->data << " ";

        head = head->next;

    }

    cout << endl;

}

void del_list(Linked_list *head)

{

    while(head != NULL)

    {

        Linked_list *t = head ->next;

        delete head;

        head = t;

    }

}

Linked_list * merge_list(Linked_list *l1, Linked_list *l2)

{

    Linked_list *h = l1, *r = l1, t;

    if(l1 == NULL)

    {

        return l2;

    }

    if(l2 == NULL)

    {

        return l1;

    }

    if(l1->data < l2->data)

    {

        h = r = l1;

        l1 = l1->next;

    }

    else

    {

        h = r = l2;

        l2 = l2->next;

    }

    while(l1->next != NULL && l2->next != NULL)

    {

        if(l1->data < l2->data)

        {

            r->next = l1;

            l1 = l1->next;

            r = r->next;

        }

        else

        {

            r->next = l2;

            l2 = l2->next;

            r = r->next;

        }

    }

    if(l1->next != NULL)

    {

        r->next = l1;

    }

    if(l2->next != NULL)

    {

        r->next = l2;

    }

    return h;

}

//declaration of main method

int main(int argc, char* argv[])

{

    Linked_list *l1 = NULL;

    Linked_list *l2 = NULL;

    for(int i = 0; i < 10; i ++)

    {

        add_node(&l1, i * 3);

    }

    print_list(l1);//it will print first linked list

    for(int i = 0; i < 10; i ++)

    {

        add_node(&l2, i * 7);

    }

    print_list(l2); //it will print 2nd linked list

    Linked_list *h = merge_list(l1, l2);

    print_list(h);

    del_list(h);

 return 0;

}

 

method of overloading

 

//program to show how method overloading works

# include<iostream>

using namespace std;

//area method with one parameter

int area(int side)

{

 return side*side;

}

//area method with two parameter

int area(int l , int b)

{

 return l*b;

}

int main()

{

 int (*para1)(int);

 int (*para2)(int,int);

 para1=area;

 para2=area;

 cout<<"Address of area(int) : "<<(unsigned int)para1<<endl;

 cout<<"Address of area(int,int) : "<<(unsigned int)para2<<endl;

 cout<<"Invoking area(int) via para1 : "<<para1(20)<<endl;

 cout<<"Invoking area(int,int) via para2 : "<<para2(10,20);

}

Minus Operator overloading

 

#include<iostream>

using namespace std;

class MinusOperatorOverloading

{

    int x,y,z;

    public:

    void get_data(int a,int b,int c)

    {

        x = a;

        y = b;

        z = c;

    }

    void operator -()

    {

        x = x - 10;

        y = y - 10;

        z = z - 10;

    }

    void display()

    {

        cout<<"\nx: "<<x;

        cout<<"\ny: "<<y;

        cout<<"\nz: "<<z;

    }

};

int main()

{

    MinusOperatorOverloading oo;

    oo.get_data(53,73,93);

    cout<<"Before overloading:";

    oo.display();

    -oo;

    cout<<"\n\n";

    cout<<"After overloading:";

    oo.display();

    return 0;

}

Multilevel Inheritance Example.

 Multilevel Inheritance Example. 

#include<iostream>

#include<string.h>

using namespace std;

class student

{

    private:

      int rl;

      char nm[20];

    public:

       void read();

       void display();

};

class marks : public student

{

    protected:

      int s1;

      int s2;

      int s3;

    public:

       void getmarks();

       void putmarks();

};

class result : public marks

{

    private:

      int t;

      float p;

      char div[10];

    public:

       void process();

       void printresult();

};

void student::read()

{

    cout<<"Enter Roll no. : ";

    cin>>rl;

    cout<<"Enter Name : ";

    cin>>nm;

}

void student:: display()

{

    cout <<"\nRoll no. : "<<rl<<endl;

    cout<<"Name : "<<nm<<endl;

    cout<<"\n";

}

void marks ::getmarks()

{

    cout<<"Enter marks for 3  subjects : "<<endl;

    cin>>s1>>s2>>s3;

}

void marks ::putmarks()

{

    cout<<"Subject 1 :"<<s1<<endl;

    cout<<"Subject 2 : "<<s2<<endl;

    cout<<"Subject 3 : "<<s3<<endl;

}

void result::process()

{

    t= s1+s2+s3;

    p = t/3.0;

    p>=60?strcpy(div,"First"):p>=50?strcpy(div, "Second"): strcpy(div,"Third");

}

void result::printresult()

{

    cout<<"Total = "<<t<<endl;

    cout<<"\n";

    cout<<"Percentage  = "<<p<<endl;

    cout<<"Division = "<<div<<endl;

}

int main()

{

    result x;

    x.read();

    x.getmarks();

    x.process();

    x.display();

    x.putmarks();

    x.printresult();

    return 0;

}

. Multiple Inheritance Example.

 

#include <iostream>

using namespace std;

class Area

{

    public:

    float area_calc(float l,float b)

    {

        return l*b;

    }

};

class Perimeter

{

    public:

    float peri_calc(float l,float b)

    {

        return 2*(l+b);

    }

};

//Rectangle class is derived from classes Area and Perimeter.

class Rectangle : private Area, private Perimeter

{

    private:

    float length, breadth;

    public:

    Rectangle() : length(0.0), breadth(0.0) { }

    void get_data( )

    {

        cout<<"Enter length: ";

        cin>>length;

        cout<<"Enter breadth: ";

        cin>>breadth;

    }

    float area_calc()

    {

        //Calls area_calc() of class Area and returns it.

        return Area::area_calc(length,breadth);

    }

    float peri_calc()

    {

        //Calls peri_calc() function of class Perimeter and returns it.

        return Perimeter::peri_calc(length,breadth);

    }

};

int main()

{

    Rectangle r;

    r.get_data();

    cout<<"\n\n";

    cout<<"Area = "<<r.area_calc();

    cout<<"\nPerimeter = "<<r.peri_calc();

    return 0;

}

Arithematic ooprations using class

 

#include <iostream>

using namespace std;

//define class

class operations

{

    //member variables

    public:

        int num1,num2;

    //member function or methods

    public:

       void add()

       {

           cout<<"enter two number for addition : ";

           cin>>num1>>num2;

           cout<<"addition = "<<num1+num2;

           cout<<"\n";

       }

        void sub()

       {

           cout<<"enter two number for subtraction : ";

           cin>>num1>>num2;

           cout<<"addition = "<<num1-num2;

           cout<<"\n";

       }

        void mul()

       {

           cout<<"enter two number for multiplication : ";

           cin>>num1>>num2;

           cout<<"addition = "<<num1*num2;

           cout<<"\n";

       }

        void div()

       {

           cout<<"enter two number for division : ";

           cin>>num1>>num2;

           cout<<"addition = "<<(float)num1/num2;

           cout<<"\n";

       }

};

 int main()

 {

     //creation of object

      operations op1;

      op1.add();

      op1.sub();

      op1.mul();

      op1.div();

      return 0;

 }

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