Goal: write a game to play "rock, paper, scissors"
The user chooses one of these, the computer chooses the other
If the pair is "rock, paper", the paper wins
If the pair is "scissors, paper", the scissors wins
If the pair is "scissors, rock", the rock wins

Specification: user enters selection of rock, paper, scissors
Program prints computer's selection, who wins
At end, computer prints number of games human won and it won

High-level design

initialize score
loop
	ask user for choice
	if quit, exit loop
	computer selects one
	select winner and increment win count
endloop

print number of games user won, computer won, ties