Why we can't create the object of abstract class ?

Why we can't create the object of abstract class ?

1  Virtual PureVirtualFunction()=0;

 This indicates compiler to reserve a slot for Function in VTABLE but  don’t put an address in that 

particular slot.  If only one function  in a class is declared as pure virtual, the VTABLE is incomplete.

If the VTABLE for a class is incomplete, compiler cannot safely create an object of a pure abstract 

class, so you get an error message from the  compiler if you try to make an object of a pure abstract 

class. Thus, the   compiler ensures the purity of the abstract class, and you don’t have to

 worry about misusing it.

2  The exact reason is .

 The function address of the pure virtual function is not put into VTABLE of the abstract class ,

 hence VTABLE of the abstract is incomplete. So when the user tries to create an instance of the 

abstract class the compliler  will throw an error.

 The reason behind this is , the abstract class contains abstract methods which cant do any job.

 Calling such function is meaningless. So it is not allowed to  instantiate abstract class

abstract class is an incomplete class,because if it have any method which  is abstract then it will be

 an abstract class, and abstract method have  not any implementation,thats why we can not create 

any object of  the abstract calss,we can not use the sealed keyword with abstract calss

A Simple Real time Example do Child Can Exsist Without Parent? ans is No, Hence we Define an Abstarct Class(Parent) and now the Controvercy is wheater Parent is alive or not? Child have aquried the Properties of 

Parent even though if he is alive or not? to Define an Abstract class keep in mind that parent is not 

alive that means instance can not be created but can be inherited .....Hence we can not create instance 

of  abstract class

abstract class contain one or more pure vertual function ,this types of  class contain only the declaration of method ,it do not have defination of any method,when we define any abstract class object it not allocate 

the memory to any object , and when any object of class will created it  first initialise memory for

 class and then methods. and look for the defination for that, for that point of view when we 

createobject of any abstract class method defination will not present  and memory cannot be allow to 

object. any by the compiler it cause the error.