Update LightBoard.java

src/main/java/LightBoard.java

@@ -11,7 +11,13 @@ public class LightBoard
   public LightBoard(int numRows, int numCols)
   {
     /* to be implemented in part (a) */
-
+    lights = new boolean[numRows][numCols];
+    for(int r = 0; r < numRows; r++){
+      for(int c = 0; c < numCols; c++){
+        double rnd = Math.random();
+        lights[r][c] = rnd < 0.4;
+      }
+    }
   }
 
   /** Evaluates a light in row index row and column index col and returns a status
@@ -21,8 +27,19 @@ public LightBoard(int numRows, int numCols)
   public boolean evaluateLight(int row, int col)
   {
     /* to be implemented in part (b) */
-
-
+   int numOn = 0;
+    for(int r = 0; r < lights.length; r++){
+      if(lights[r][col]){
+        numOn++;
+      }
+        if(lights[row][col] && numOn %2 == 0){
+        return false;
+      }
+        if(!lights[row][col] && numOn % 3 == 0){
+        return true;
+      }
+    }
+ return lights[row][col];
   }
   public boolean[][] getLights()
   {