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Pointers to objects - C++ [1/2]

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Level:	Expert
Date:	2006-Dec-12
Visited:	1915 times
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Author:	Alex Plumpton

A pointer can point to an object of a class. Consider a class emp, which is defined as shown.


Example

Class emp

{

int code;

float salary;

public:

Void input(int c, float s)

{

code=c; 

salary=s;

}

void display(void)

{

cout�"EmpIoyee code'' �code;

cout�"Employee salary "�salary; 

}

};



we can declare a pointer ptr of type class emp



epm *ptr;

Pointer can be made to point to the object at runtime. Thus, they are useful for dynamic memory allocation. The pointer ptr of class emp is made to point to the address of the object objl as shown.


Emp *ptr = &obj1;



Obj1.input(5,2.3); 

Obj1.display();



(*ptr).Obj1.input(5,2.3); (*ptr).0bj1.display();

- Pointers to objects - C++ [1/2] -

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Pointers to objects - C++ [1/2]