slip 23

/* Slip no : 23_1 Write the definition for a class called ‘point’ that has x & y as integer data members. Use copy constructor to copy one object to another. (Use Default and parameterized constructor to initialize the appropriate objects)

    Write a C++ program to illustrate the use of above class.           */

#include<stdio.h>

#include<conio.h>

#include<iostream.h>

class point

{

                int x,y;

                public:

                point()

                {

                }

                point(int a,int b)

                {

                                x=a;

                                y=b;

                }

                point(point &ob2)

                {

                                x=ob2.x;

                                y=ob2.y;

                }

                void display()

                {

                                cout<<"\nx = "<<x<<"\t y = "<<y;

                }

};

void main()

{

                point ob1(100,200);

                int n,m;

                clrscr();

                ob1.display();

                point ob2(ob1);

                cout<<"\nAfter copy comstructor .\n";

                ob2.display();

                cout<<"\nEnter number : ";

                cin>>n;

                cout<<"\nEnter number : ";

                cin>>m;

                point ob3(n,m);

                ob3.display();

                ob2=ob3;

                cout<<"\nAfter copy comstructor .\n";

                ob2.display();

                getch();

}

/* Slip no : 23_2 Create a C++ class MyFile containing:

                                - FILE *fp;

                                - Char filename[maxsize];

                Write necessary member Functions using operator overloading:

<<                 To display the contents of a file

>>           To write the contents into a file */

#include<iostream.h>

#include<conio.h>

#include<fstream.h>

#include<stdlib.h>

#include<ctype.h>

class MyFile

{

                int rno;

                char name[30];

                public:

                MyFile(){}

                MyFile(int r,char nm[])

                {             

                                rno=r;

                                strcpy(name,nm);

                }

                friend ofstream& operator<<(ofstream & ,MyFile &);

                friend ifstream& operator>>(ifstream & ,MyFile &);

};

ofstream& operator<<(ofstream &out,MyFile &f)

{

                out<<f.rno<<"\t"<<f.name<<endl;

                return out;

}

ifstream& operator>>(ifstream &in,MyFile &f)

{

                in>>f.rno>>f.name;

                return in;

}

void main()

{

                MyFile ob(1,"ABC"),ob2(2,"XYz");

                ofstream fout("Slip23.txt");

                fout<<ob<<ob2;

                fout.close();

                ifstream fin("Slip23.txt");

                fin>>ob>>ob2;

                fin.close();

                getch();

}