How to calculate the size of an object?
1) The size of an object can be calculated by summing the size of the variables of the class the object is instantiated from.
2) If a class has an integer, a double variable defined in it then the size of the object of the class is size(int)+size(double).
3) If there is an array, then the size of the object would be the length of array*size of data type of array.
