Classes

Accessing Data Fields

Only member functions of a class are allowed to access the private data fields of objects of that class.

void raise_salary(Employee& e, double percent)
{
   e.salary = e.salary * (1 + percent / 100 ); /* Error */
}

Data fields must be accessed by accessor and mutator functions.

void raise_salary(Emplyee & e, double percent)
{
   double new_salary = e.get_salary() * (1 + percent / 100);
   e.set_salary(new_salary);
}