CODEWITHSUNDEEP
c++class
kanaram bhari
kanaram bhari

Reputation: 13

Size of user defined class in c++

Is there a method of calculating size of c++ class. when i create a object of this below class ,size of object is 24 byte.

class student
{
  student* pointer;
  char * c;
  student* AnotherPointer;
  class SubClass
  {
    int a,b;  
  };
};

and now removing Subclass from student class,i am still getting size of Student class object is 24. why it is not changing?? 

class student
{
  student* pointer;
  char * c;
  student* AnotherPointer;
};

Upvotes: 0

Views: 649

Answers (1)

eerorika
eerorika

Reputation: 238311

Is there a method of calculating size of c++ class.

You can use the sizeof operator to get the size of a class, or any other type. For example:

std::cout << sizeof(student);

removing Subclass

Note that the class named Subclass is not a "subclass". It is a nested class.

why it is not changing??

Because you made no changes to sub objects of the class. A nested class is not a sub object. It is in fact not an object at all - it is a type.

Upvotes: 2

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