Data commit

Task/Nim-game/Java/nim-game.java

@@ -0,0 +1,54 @@
+import java.util.Scanner;
+
+public class NimGame {
+
+    public static void main(String[] args) {
+        runGame(12);
+    }
+
+    private static void runGame(int tokens) {
+        System.out.printf("Nim game.%n%n");
+
+        Scanner in = new Scanner(System.in);;
+
+        do {
+            boolean humanInputOk = false;
+            int humanTokens = 0;
+            while ( ! humanInputOk ) {
+                System.out.printf("Human takes how many tokens?  ");
+                String input = in.next();
+                try {
+                    humanTokens = Integer.parseInt(input);
+                    if ( humanTokens >= 1 && humanTokens <= 3 ) {
+                        humanInputOk = true;
+                    }
+                    else {
+                        System.out.printf("Try a number between 1 and 3.%n");
+                    }
+                }
+                catch (NumberFormatException e) {
+                    System.out.printf("Invalid input.  Try a number between 1 and 3.%n");
+                }
+            }
+
+            tokens -= humanTokens;
+
+            System.out.printf("You take %d token%s.%n%d token%s remaining.%n%n", humanTokens, humanTokens > 1 ? "s" : "", tokens, tokens != 1 ? "s" : "");
+            if ( tokens == 0 ) {
+                System.out.printf("You win!!.%n%n");
+                break;
+            }
+            int computerTokens = 4 - humanTokens;
+            tokens -= computerTokens;
+
+            System.out.printf("Computer takes %d token%s.%n%d token%s remaining.%n%n", computerTokens, computerTokens != 1 ? "s" : "", tokens, tokens != 1 ? "s" : "");
+            if ( tokens == 0 ) {
+                System.out.printf("Computer wins!!.%n%n");
+            }
+
+        } while (tokens > 0);
+
+        in.close();
+    }
+
+}