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Problem
Rock-Paper-Scissors is a game played by two players with a one in three chance of winning. The outcome of each round will result the player to either win, lose, or tie. In this example, we're going to make a simulation of the game, Rock-Paper-Scissors, to play against the computer.
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SideSectionTitle
Taken from http://www.flickr.com/photos/daniello/565304023/
An image or By Students section
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Solution
The solution...
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Code
Solution Code
import javax.swing.JOptionPane;
public class RockPaperScissors {
public static void main(String[] args) {
final int MAX = 1000;
final int ROCK = 0;
final int PAPER = 1;
final int SCISSORS = 2;
String input = "";
int player;
int count = 0;
int [] rounds = new int [MAX];
boolean loop = true;
System.out.println("Rock Paper Scissors!");
while((count < MAX) && (loop)) {
input = JOptionPane.showInputDialog(null,"Enter an option: rock, paper, scissors, summary, or quit: ");
if((input == null) || (input.equalsIgnoreCase("quit"))) {
loop = false;
}
else if(input.equalsIgnoreCase("rock")) {
player = ROCK;
rounds[count] = playRound(player,ROCK,PAPER,SCISSORS);
count++;
}
else if (input.equalsIgnoreCase("paper")) {
player = PAPER;
rounds[count] = playRound(player,ROCK,PAPER,SCISSORS);
count++;
}
else if (input.equalsIgnoreCase("scissors")) {
player = SCISSORS;
rounds[count] = playRound(player,ROCK,PAPER,SCISSORS);
count++;
}
else if (input.equalsIgnoreCase("summary")) {
summary(rounds,count);
}
else {
System.out.println("Invalid input.");
}
}
System.out.println("End of processing.");
System.exit (0);
}
public static int playRound(int player, int ROCK, int PAPER, int SCISSORS) {
int computer;
int result = 0;
computer = (int)(Math.random() * 3);
if((player == ROCK) && (computer == SCISSORS)) {
result = 1;
System.out.println("Computer chose scissors. You are victorious!");
}
else if((player == ROCK) && (computer == PAPER)) {
result = 2;
System.out.println("Computer chose paper. You have been defeated.");
}
else if((player == PAPER) && (computer == ROCK)) {
result = 1;
System.out.println("Computer chose rock. You are victorious!");
}
else if ((player == PAPER) && (computer == SCISSORS)) {
result = 2;
System.out.println("Computer chose scissors. You have been defeated.");
}
else if ((player == SCISSORS) && (computer == PAPER)) {
result = 1;
System.out.println("Computer chose paper. You are victorious!");
}
else if ((player == SCISSORS) && (computer == ROCK)) {
result = 2;
System.out.println("Computer chose rock. You have been defeated.");
}
else if (player == computer) {
result = 3;
System.out.println("Computer chose the same. It's a draw!");
}
return result;
}
public static void summary(int [] rounds, int count) {
int wins = 0;
int loses = 0;
int draws = 0;
double average;
int winStreak;
for(int i = 0; i < count; i++) {
if(rounds[i] == 1) {
wins++;
}
else if(rounds[i] == 2) {
loses++;
}
else if(rounds[i] == 3) {
draws++;
}
}
average = getAverage(wins,count);
winStreak = winningStreak(rounds,count);
System.out.println("===Summary===");
System.out.println("");
System.out.println("Total wins: " + wins);
System.out.println("Total losses: " + loses);
System.out.println("Total draws: " + draws);
System.out.println("Winning Average: " + average + "%");
System.out.println("Win Streak: " + winStreak);
}
public static double getAverage(int wins, int count) {
double average = 0;
int temp;
average = (double) wins / count;
average = average * 100;
temp = (int) (average * 10);
average = (double) temp / 10;
return average;
}
public static int winningStreak(int [] rounds, int count) {
int streak = 0;
int winStreak = 0;
for(int i = 0; i < count; i++) {
if(rounds[i] == 1) {
streak++;
}
else {
streak = 0;
}
if(streak > winStreak) {
winStreak = streak;
}
}
return winStreak;
}
}
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