Classes

Comparing Member Functions with Nonmember Functions

Consider the nonmember function

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

versus the memeber function

void Employee::raise_salary(double percent)
{
   salary = salary * (1 + percent / 100);
}

A nonmember function is called with two explicit parameters.
```
raise_salary(harry, 7);
```
A member function is called using the dot notation, with one explicit parameter and one implicit parameter.
```
harry.raise_salary(7);
```

A member function can invoke another member function on the implicit parameter without using the dot notation.

void Employee::print() const
{
   cout << "Name: " << get_name()
      << "Salary: " << get_salary()
      << "\n";
}