Write the implementation (.cpp file) of the Counter class from the previous exercise. Here is the full specification of the class:
The class contains:
* A data member counter of type int.
* A constructor that accepts no arguments and initializes the counter data member to 0.
* A function called increment that accepts no parameters and returns no value. increment adds one to the counter data member.
* A function called getValue that accepts no parameters. It returns the value of the instance variable counter.