C(4)

 Write a function that takes two parameters (a string of no more than 50 characters and a letter the user inputs), then returns the count of how many times user input character is in the string. If the letter is not found, the function returns -1. Example "Hello",' f' returns -1.
Use the function in main to get two inputs from the user, a sentence and a character, then show the count of that character.