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--- neighbors [2025/05/27 10:52] – created frchris
+++ neighbors [2025/07/16 11:52] (current) – frchris
@@ Line 1: / Line 1: @@
 ====== Neighbors ======
-This game from Math Games with Bad Drawings can be played with 1 to 30 people.  Everyone has an empty 5 by 5 grid.  A random number from 1 to 10 is chosen, and everyone must place it into their grid. After the grid is filled a score is computed.  On each row, circle any groups with 2 or more of the same number, and add these circled numbers.  Do the same for each column.  The score is the sum of these numbers.
+This game from **Math Games with Bad Drawings** by Ben Orlin.  It can be played with 1 to 30 people.  Everyone has an empty 5 by 5 grid.  A random number from 1 to 10 is chosen, and everyone must place it into their grid. After the grid is filled a score is computed.  On each row, circle any groups with 2 or more of the same number, and add these circled numbers.  Do the same for each column.  The score is the sum of these numbers.
+<code java Neighbors.java>
+import java.util.Scanner;
+/**
+ * Neighbors game from Math Games with Bad Drawings by .
+ *
+ * @author (your name)
+ * @version (a version number or a date)
+ */
+public class Neighbors
+{
+    private Grid[] boards;
+    private int n;
+    public Neighbors(int n){
+        this.n = n;
+        boards = new Grid[n];
+        for (int i = 0; i < n; i++){
+            boards[i] = new Grid();
+        }
+    }
+    public Grid get(int i){
+        return boards[i];
+    }
+    public String toString(){
+        String result = "";
+        for (int i = 0; i< n; i++){
+            result += "\nPlayer "+(1+i)+":\n";
+            result += boards[i].toString()+"\n";
+        }
+        return result;
+    }
+    public static int getInt(Scanner kb, String prompt){
+        System.out.print(prompt);
+        String num = kb.nextLine();
+        int result = "012345".indexOf(num);
+        if (result <0) {
+             System.out.println("Type a number from 1 to 5");
+             return getInt(kb, prompt);
+        }
+        return result;
+    }
+    public static void testScoring(){
+        int[][] arr1 = {{8, 8, 4, 4, 3},
+                        {8, 8, 1, 4, 3},
+                        {6, 7,10, 7, 3},
+                        {6, 6, 5, 7, 7},
+                        {2, 2, 5, 9, 9}};//85
+        Grid g1 = new Grid(arr1);
+        int[][] arr2 ={ {2, 2, 3, 3, 7},
+                        {8, 8, 3, 7, 7},
+                        {8, 8,10, 7, 9},
+                        {4, 5, 6, 6, 5},
+                        {4, 4, 6, 1, 5}};//100
+        Grid g2 = new Grid(arr2);
+        int[][] arr3 ={ {6, 8, 8, 1, 7},
+                        {6, 6, 8, 8, 7},
+                        {5,10, 3, 9, 7},
+                        {5, 4, 4, 9, 7},
+                        {2, 2, 4, 3, 3}};//92
+        Grid g3 = new Grid(arr3);
+        System.out.println( g1 +"\nscore:" + g1.score() + "(Should be 173)");
+        System.out.println( g2 +"\nscore:" + g2.score() + "(Should be 172)");
+        System.out.println( g3 +"\nscore:" + g3.score() + "(Should be 154)");
+    }
+    public static void main(String[] args)
+    {
+        Scanner kb = new Scanner(System.in);
+        System.out.print("How many players? ");
+        String line = kb.nextLine();
+        int n = Integer.parseInt(line);
+        Neighbors game = new Neighbors(n);
+        //System.out.println(game);
+        for (int i = 1; i <= 25; i++){
+            int roll = 1 + (int)(10*Math.random());
+            System.out.println("Random Number "+i+" is "+roll);
+            for (int player = 0; player < n; player++){
+                System.out.println(game);
+                boolean okay;
+                do {
+                    String prompt = "Player "+(player+1)+", choose a row (1 to 5) to place "+roll+":";
+                    int row = getInt(kb, prompt);
+                    prompt = "Player "+(player+1)+", choose a column (1 to 5):";
+                    int col = getInt(kb, prompt);
+                    okay = game.get(player).set(roll, row, col);
+                } while (!okay);
+            }
+        }
+        System.out.println(game);
+    }
+}
+</code>
+<code java Grid.java>
+/**
+ * Write a description of class Grid here.
+ *
+ * @author
+ * @version (a version number or a date)
+ */
+public class Grid
+{
+    // instance variables - replace the example below with your own
+    private int[][] grid;
+    /**
+     * Constructor for objects of class Grid
+     */
+    public Grid()
+    {
+        grid = new int[5][5];
+    }
+    public Grid(int[][] arr){
+        grid = arr;
+    }
+    public boolean set(int number, int row, int col){
+        if (grid[row-1][col-1] > 0)
+            return false;
+        grid[row-1][col-1] = number;
+        return true;
+    }
+    public int score(){
+        int total = 0;
+        for (int[] row: grid){
+            int b = 0;
+            int e;
+            do {
+                e = b+1;
+                int run = 1;
+                int value = row[b];
+                while ( e < 5 && row[b]==row[e]){
+                    run++;
+                    e++;
+                }
+                if (run >1)
+                    total += run*row[b];
+                b =e ;
+            }while (e < 5);
+        }
+        //columns
+        System.out.println(" row total:"+total);
+        for(int col =0; col < 5 ; col++){
+            int b = 0;
+            int e;
+            do {
+                e = b+ 1;
+                int run =1;
+                int value = grid[b][col];
+                while ( e < 5 && grid[b][col] == grid[e][col]){
+                    run++;
+                    e++;
+                }
+                if (run >1 )
+                    total += run*grid[b][col];
+                b = e;
+            }while (e<5);
+        }
+         return total;
+    }
+    public String toString()
+    {
+        String result="|";
+        for (int[] row: grid){
+            for(int cell: row)
+            {
+                if(cell<10)
+                   result += " ";
+                result +=  + cell +" |";
+            }
+            result += "\n|";
+        }
+        int last = result.length()-2;
+        return result.substring(0, last)+ "Score: "+score();
+    }
+}
+</code>
+Back to [[New Labs]]