Array of Objects

Array of Objects

•  In some database like applications we need to maintain the set of record for each entity.

•  For example if we want to store the roll numbers and names of 50 students in an array then instead of creating 50 objects, an array of objects can be created.

•  Following is a simple C++ program in which we have created an array of objects in which the student record is stored and then displayed.

#include<iostream>

using namespace std;

 #define MAX 50

class ArrObjects

{

private:

    int roll;

    char name[20];

public:

void get_data()

{

    cout<<"\n Enter roll number: ";

    cin>>roll;

    cout<<"\n Enter name: ";

    cin>>name;

}

void display()

{

    cout<<"\n Roll: "<<roll;

    cout<<"\n Name: "<<name;

}

};

void main()

{

ArrObjects obj[MAX]; //array of objects is created here

char ans='y';

 int n=0;

do

{

    cout<<"\n Enter Record ";

     obj[n++].get_data();

    cout<<"\n Do You Want to enter more record?";

    cin>>ans;

} while(ans= ='y' || ans = ='Y');

    cout<<"\n\n You have entered following data...\n";

    for(int i=0;i<n;i++)

        obj[i].display();

}

Output

Enter Record

Enter roll number: 10

Enter name: AAA

Do You Want to enter more record? y

Enter Record

Enter roll number: 20

Enter name: BBB

Do You Want to enter more record? y

Enter Record

Enter roll number: 30

Enter name: CCC

Do You Want to enter more record?

You have entered following data...

Roll: 10

Name: AAA

Roll: 20

Name: BBB

Roll: 30

Name: CCC

Review Question

1. Explain array of objects with example.