Arrays and Classes

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Arrays and Classes


First of all you should have the proper knowledge of the arrays.

If you dont know about array then go to the following link :

Arrays

Arrays and classes can be in two ways :

• Array within classes
• Array of objects

-Array within classes :

In this the data member is declared as an array of the required size.

Syntax :

class class-name
{
private :

datamember[size];

public :

datamember[size];
member function;
};


Example :

#include <iostream.h>
#include <conio.h>

class Student
{
private:

int rollno[4];
int i;

public:

void setRecord();
void display();

};

void Student :: setRecord()
{
cout<<"Enter the rollno's 4 students : ";

for(i=0;i<=3;i++)
{
cin>>rollno[i];
}

}

void Student :: display()
{
cout<<"\n\nRollno are : ";

for(i=0;i<=3;i++)
{
cout<<"\n" << rollno[i];
}

}

void main()
{
clrscr();

Student stud;

stud.setRecord();

stud.display();

getch();

}

Output :














- Array of objects :


In this case the object is an array of respective size. Means the class can be accessed many
times by a single object.
Syntax :

class class-name
{
private :

datamember;

public :

datamember;
member function;
};
class class-name object[size];

Example :


#include <iostream.h>
#include <conio.h>

class Student
{
private:

int rollno;
int i;

public:

void setRecord();
void display();

};

void Student :: setRecord()
{


cin>>rollno;


}

void Student :: display()
{

cout<<"\n" << rollno;


}

void main()
{
clrscr();

int i;

Student stud[3];

cout<<"Enter 4 roll numbers : ";

for(i=0;i<=3;i++)
{
stud[i].setRecord();
}

cout<<"\n\nYou entered following roll no's : ";

for(i=0;i<=3;i++)
{
stud[i].display();
}
getch();

}

Output :

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