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src/AlgoRechercheminmax/AlgoRechercheMinMax.java

+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package tictactoecodingame;
+
+import static java.lang.Math.max;
+
+/**
+ *
+ * @author Alain
+ */
+public class AlgoRechercheMinMax {
+    
+    String[][] grille = {{"","",""},{"","",""},{"","",""}};
+    int[] scores = {1,-1,0};
+    
+    
+    public Coup meilleur_coup_minmax(){
+      double inf = Double.POSITIVE_INFINITY;
+      double bestScore = -1 * inf;
+      int[] meilleur_coup = new int[2] ;
+      
+      for (int i = 0; i < 3; i++){
+        for (int j = 0; j < 3; j++){
+            if (grille[i][j] == "" ) {
+                grille[i][j] = "X";}
+                int score = minimax(grille,0,false);
+                grille[i][j] = "" ;
+                if (score > bestScore){
+                    bestScore = score;
+                    meilleur_coup[0] = i;
+                    meilleur_coup[1] = j;
+                }
+                        
+            } 
+        }
+      grille[meilleur_coup[0]][meilleur_coup[1]] = "X";
+      // changer le tour du joueur ?
+    }
+    
+    public int minimax(grille, profondeur, isMaximizing){
+        Joueur gagnant = grille.vainqueur(); //Il faudrait connaitre le vainqueur
+        int resultat = gagnant.getIdJoueur();
+        if (resultat !== null) {
+            return scores[resultat];
+        }
+        
+        if (isMaximizing) {
+            double inf = Double.POSITIVE_INFINITY;
+      double bestScore = -1 * inf;
+      
+      for (int i = 0; i < 3; i++){
+        for (int j = 0; j < 3; j++){
+            if (grille[i][j] == "" ) {
+                grille[i][j] = "X";
+                double score = minimax(grille,profondeur + 1,false);
+                grille[i][j] = "" ;
+                bestScore = max(score,bestScore);
+        }
+        }
+      }
+      return bestScore;
+     }
+       else {
+            double inf = Double.POSITIVE_INFINITY;
+            double bestScore = inf;
+            for (int i = 0; i < 3; i++){
+        for (int j = 0; j < 3; j++){
+            if (grille[i][j] == "" ) {
+                grille[i][j] = "X";
+                double score = minimax(grille,profondeur + 1,true);
+                grille[i][j] = "" ;
+                bestScore = min(score,bestScore);
+        }
+            }
+            }
+            return bestScore;
+        }
+    }
+    
+