The intention of this problem is to analyze a user input word, and display the letter that it starts with (book → B). a. Create a function prototype for a function that accepts a word less than 25 characters long, and return a character.
b. Write the function definition for this function that evaluates the input word and returns the letter that the word starts with in capital letter (if it’s in small letters).
c. Create a function call in the main function, and use the function output to print the following message based on the input from the user. (Remember to have a command prompt in the main function requesting the user to enter any word.)

Computer starts with the letter C.
Summer starts with the letter S.

d. Make sure to consider the case where a naughty user enters characters other than the alphabet to form a word and display a relevant message.

%sb$ is not a word.
$500 is not a word.

e. Have the program process words until it encounters a word beginning with the character