class MyClass

{

 int num;

char ch[15];

public:

void getNumChar();

}

While allocating the memory to above class

2 byte for num

15 byte for ch

In such a way 17 bytes for class

If you create 2 objects of the class then 34 bytes will be allocated for the class. The memory allocation is depends on the how many times you are creating the object of that class and the data types of attribute.