*3.17 (Game: scissor, rock, paper) Write a program that plays the popular scissor-rock-paper game. (A scissor can cut a paper, a rock can knock a scissor, and a paper can wrap a rock.) The program randomly generates a number 0 , 1 , or 2 representing scissor, rock, and paper. The program prompts the user to enter a number 0 , 1 , or 2 and displays a message indicating whether the user or the computer wins, loses, or draws. Here are sample runs:
scissor (0), rock (1), paper (2): 1
The computer is scissor. You are rock. You won
scissor (0), rock (1), paper (2): 2
The computer is paper. You are paper too. It is a draw
scissor (0), rock (1), paper (2): 1
The computer is scissor. You are rock. You won
scissor (0), rock (1), paper (2): 2
The computer is paper. You are paper too. It is a draw
public class ProgrammingEx3_17 { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("scissor (0), rock (1), paper (2):"); int guess = input.nextInt(); int computer = (int) (Math.random() * 3); String strComputer = ""; switch (computer) { case 0: strComputer = "scissor"; break; case 1: strComputer = "rock"; break; case 2: strComputer = "paper"; break; } String strGuess = ""; switch (guess) { case 0: strGuess = "scissor"; break; case 1: strGuess = "rock"; break; case 2: strGuess = "paper"; break; default: System.out.print("Invalid input."); System.exit(0); } System.out.print("The computer is " + strComputer + ". You are " + strGuess); if (computer == guess) { System.out.print(" too. It is a draw"); } else if (computer - guess == 1 || computer - guess == -2) { System.out.print(". Computer won."); } else if (computer - guess == -1 || computer - guess == 2) { System.out.print(". You won."); } } }
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