Define a struct type with the name Length that represents a length in yards, feet, and inches. Define an add() function that will add two Length arguments and return the sum as type Length. Define a second function, show(), that will display the value of its Length argument. Write a program that will use the Length type and the add() and show() functions to sum an arbitrary number of lengths in yards, feet, and inches that are entered from the keyboard and output the total length.