12th cbse c++

#include<iostream.h>

#include<fstream.h>

#include<stdlib.h>

Class Student     {              char name[40];

                                                char grade;

                                                float marks;

                                public:

                                                void getdata(void);

                                                void display(void);           };

void Student :: getdata(void)

{              char ch;

                cin.get(ch);

                cout<<”Enter name:  “;                                 cin.getline(name,40);

                cout<<”Enter Grade:  ”;                                                cin>>grade;

                cout<<”Enter Marks: “;                                 cin>>marks;

                cout<<”\n”;

}

Void Student::display(void)

{              cout<<”Name:”<<name<<”\t”

                cout<<”Grade:”<<grade<<”\t”

                cout<<”Marks:”<<marks<<”\t”                 <<”\n”;

}

Int main()

{              system(“cls”);

                Student arts[3];                                                                //declare array of 3 objects

                fstream filin;                                                      //input and output file

                filin.open(“Stu.dat”,ios::in|ios::out);

                if(!filin)

                {              cout << “Can not open file!!\n”;

                                Return 1;

                }

                Cout <<”Enter details for 3 students \n”;

                for(int i=0;I<3;i++)

                {              arts[i].getdata();

                                filin.write((char *) & arts[i], sizeof (arts[i]));

                }

                Filin.seekg(0);                                                    //seek 0 resets the file to start,so that the file can

                                                                                                //be accessed from the beginning.

                cout<<”The contents of stu.dat are shown below.\n”;

               

                for(i=0;i<3;i++)

                {              filin.read((char *)&arts[i],sizeof(arts[i]));

                                Arts[i].display();

                }

                Filin.close();

                Return 0;

}