playground -> change | void added!

src/PlayGround.java

@@ -2,11 +2,12 @@ import java.util.Random;
 
 public class PlayGround {
     private int[][] ground;
-    int n, m;
+    int n, m, policeNumbers;
 
-    PlayGround(int n, int m) {
+    PlayGround(int n, int m, int policeNumbers) {
         this.n = n;
         this.m = m;
+        this.policeNumbers = policeNumbers;
         ground = new int[n][m];
         int i, j;
         for (i = 0; i < n; i++)
@@ -29,11 +30,11 @@ public class PlayGround {
         }
     }
 
-    public void putRandom(int policeNumber) {
+    public void putRandom() {
         int i, j, k;
         Random rand = new Random();
-        if (n * m > policeNumber)
-            for (k = 0; k < policeNumber; k++) {
+        if (n * m > policeNumbers)
+            for (k = 0; k < policeNumbers; k++) {
                 i = rand.nextInt();
                 j = rand.nextInt();
                 if (ground[i][j] == 0)
@@ -43,5 +44,16 @@ public class PlayGround {
         else System.out.println("Error!! police numbers are higher than n*m");
     }
 
+    public void change(int[][] newPolicesSituation, int xThief, int yThief) {
+        int i, j;
+        for (i = 0; i < n; i++)
+            for (j = 0; j < m; j++)
+                ground[i][j] = 0;
+        for (i = 0; i < policeNumbers; i++)
+            ground[newPolicesSituation[i][0]][newPolicesSituation[i][1]] = 1;
+
+        ground[xThief][yThief] = -1;
+    }
+
 
 }