Program

Write a program that takes one or more strings as arguments and a number between 0 and 13 as the last argument. The program must shift each alphabetical character in each string by the given number of positions in the alphabet, using a Caesar cipher.

Function

Write a function that takes a string as an argument and displays the frequency of each character in alphabetical order

Program

Reproduce the behavior of the `touch` command and display the names of the files passed as arguments.

Function

Create a function gm_sum that takes an unsigned integer n as its first argument, followed by n integers passed as variable arguments. The function must return the sum of these integers.