In C++, Write the implementation (.cpp file) of the Accumulator class of the previous exercise. The full specification of the class is:

An data member named sum of type integer.

A constructor that accepts an integer parameter. THe constructor initializes the data member sum to the value of the parameter.

A function named getSum that accepts no parameters and returns an integer. getSum returns the value of sum.

A function named add that accepts an integer parameter and returns no value. add increases the value of sum by the value of the parameter.