Chapter 4, Problem 18PP

Write a function named sort that takes three integer parameters by reference. The function should rearrange the parameter values so that the first parameter gets set to the smallest value, the $\left(a,b,c\right)$ second parameter gets set to the second smallest value, and the third parameter gets set to the largest value. For example, given the variable assignments a 20, the function call sort should result in $a=30;b=10;$ and $c=30.$ Note that the array construct covered in Chapter 5 will give you a way to solve this problem for an arbitrary number of items instead of only for three items.