Write the interface (.h file) of a class GasTank containing:

An data member named amount of type double .

A constructor that accepts no parameters .

A function named addGas that accepts a parameter of type double and returns no value .

A function named useGas that accepts a parameter of type double and returns no value .

A function named isEmpty that accepts no parameters and returns a boolean value .

A function named getGasLevel that accepts no parameters and returns double .