13.5 Focus on Software Engineering: Separating Class Specification from Implementation: 10854

Question

Write the interface (.h file) of a class  Counter containing:
An instance variable  counter of type  int , initialized to 0.
A function called  increment that adds one to the instance variable  counter . It does not accept parameters or return a value.
A function called  getValue that doesn't accept any parameters. It returns the value of the instance variable  counter .
A default constructor.

Solution
class Counter {

private:
int counter;

public:
void increment();
int getValue();
Counter();
};