Write a function named sort that takes three integer parameters by reference. The function should rearrange the parameter values so that the first parameters gets set to the smallest value, the 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=30; b=10; c=20, the function call sort(a,b,c) should result in a=10, b=20, and c=30.