C$++$ Help!

Problem Specification:

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Create a program to calculate and display the area of a trapezoid using the formula: $(1)/(2)*($side a $+$ side b$)*$ height

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$$ The user will enter side a$,$ side b$,$ and the height of the trapezoid.$$ Create and use a function that will return a number greater than zero to get these values from the user.

$$ Create a function to calculate and return the area of the trapezoid.

$$ From the main$()$ function, display the area with one digit to the right of the decimal point

$$ Allow the user to calculate an area as many times as they would like.$$

$$ Display the number of times the user calculated area at the end of the program.