So, following is a member function of Class Sales_data which is defined outside the class,
Sales_data& Sales_data::combine(const Sales_data &rhs) {
units_sold += rhs.units_sold;
revenue += rhs.revenue; //adding the members of rhs into the members of "this" object
return *this;
} //units_sold and revenue are both data members of class
When the function is called, it is called like
total.combine(trans); //total and trans are the objects of class
What i am not understanding is the function returning *this,
i understand it returns an instance of the object but it is not returning that instance to anything as we can see during function call, also if i don't write the return statement, would it work any differently.
Someone please explain elaborately because i am just not getting it.