Problem 1: Write and test a function that takes the address of three double variables as arguments and that moves the value of the smallest variable into the first variable, the middle value to the second variable, and the largest value into the third variable.
Problem 2: Write a program that reads characters from the standard input to end of file. For each character, have the program report whether it is a letter. If it is a letter, also report its numerical location in the alphabet. For example, c and C would both be letter 3.
Incorporate a function that takes a character as an argument and returns the numerical location if the character is letter and that returns -1 otherwise.