rock paper scissors.. other choices.

[helloalyssa]

i'm currently writing a rock paper scissors program. our output should look like the following:

bash-2.04$ a.out
Player One, please enter your move: ('P' for Paper, 'R' for Rock, 'S' for Scissor) r
Player Two, please enter your move: ('P' for Paper, 'R' for Rock, 'S' for Scissor) p
Player 2 wins: Paper covers Rock!

bash-2.04$ a.out
Player One, please enter your move: ('P' for Paper, 'R' for Rock, 'S' for Scissor) S
Player Two, please enter your move: ('P' for Paper, 'R' for Rock, 'S' for Scissor) r
Player 2 wins: Rock breaks Scissors!

bash-2.04$ a.out
Player One, please enter your move: ('P' for Paper, 'R' for Rock, 'S' for Scissor) p
Player Two, please enter your move: ('P' for Paper, 'R' for Rock, 'S' for Scissor) S
Player 2 wins: Scissors cut Paper!!

bash-2.04$ a.out
Player One, please enter your move: ('P' for Paper, 'R' for Rock, 'S' for Scissor) r
Player Two, please enter your move: ('P' for Paper, 'R' for Rock, 'S' for Scissor) x
Player 2 has entered an invalid move.

bash-2.04$ a.out
Player One, please enter your move: ('P' for Paper, 'R' for Rock, 'S' for Scissor) w
Player Two, please enter your move: ('P' for Paper, 'R' for Rock, 'S' for Scissor) r
Player 1 has entered an invalid move.

bash-2.04$ a.out
Player One, please enter your move: ('P' for Paper, 'R' for Rock, 'S' for Scissor) r
Player Two, please enter your move: ('P' for Paper, 'R' for Rock, 'S' for Scissor) R
Tie with Rock!

bash-2.04$ a.out
Player One, please enter your move: ('P' for Paper, 'R' for Rock, 'S' for Scissor) P
Player Two, please enter your move: ('P' for Paper, 'R' for Rock, 'S' for Scissor) P
Tie with Paper!

i've gotten all of them except for the invalid inputs. i know i can't just make an if statement (if (player1 == 'r' && player2 == 'x') for it because it should be for any invalid input. what should i use to invalidate any other letters besides R, P or S?

[ಠ_ಠ]

if you structure your logic the right way all invalid inputs will fall into the else block