23020046 - Hoàng Hữu Đức - L7-Snake

AdvProg_L7-Snake/Game.cpp

@@ -51,12 +51,19 @@ Game::~Game()
 ***/
 
 void Game::snakeMoveTo(Position pos) {
-	//  START CODE HERE
-	//
-	//
-	//
-	//
-	// END CODE HERE
+	if (getCellType(pos) == CELL_OFF_BOARD || getCellType(pos) == CELL_SNAKE) {
+		status = GAME_OVER;
+		return;
+	}
+
+	if (getCellType(pos) == CELL_CHERRY) {
+		score += 1;
+		snake.eatCherry();
+		addCherry();
+		return;
+	}
+
+	setCellType(pos, CELL_SNAKE);
 }
 
 
@@ -72,12 +79,7 @@ void Game::snakeMoveTo(Position pos) {
  ***/
 void Game::snakeLeave(Position position)
 {
-	// Suggestion: use setCellType() method in Game class
-	// START CODE HERE
-	//  
-	//
-	//
-	// END CODE HERE
+	setCellType(position, CELL_EMPTY);
 }
 
 
@@ -104,8 +106,8 @@ void Game::processUserInput(Direction direction)
  ***/
 bool Game::canChange(Direction current, Direction next) const {
 	if (current == UP || current == DOWN) 
-		return 0; // YOUR CODE HERE
-	return 0;// YOUR CODE HERE
+		return (next != UP && next != DOWN);
+	return (next != LEFT && next != RIGHT);
 }
 
 
@@ -128,14 +130,14 @@ void Game::nextStep()
 {
 	while (!inputQueue.empty()) {
 		// get the input direction from input queue
-        Direction next ; // YOUR CODE HERE
-
+        Direction next = inputQueue.front();
+        inputQueue.pop();
 		// remove the front of input queue
         // YOUR CODE HERE
 
 		// check if snake can move to the next direction, set current direction as next
         if (canChange(currentDirection, next)) {
-        	// YOUR CODE HERE
+        	currentDirection = next;
         	break;
 		}
     }
@@ -162,15 +164,15 @@ void Game::addCherry()
 		// init a random position inside the play screen (width, height)
 		// Suggestion: use rand() function
 
-        Position randomPos; // YOUR CODE HERE
+        Position randomPos = {rand() % width, rand() % height}; // YOUR CODE HERE
 
 		// check if the randomPos is EMPTY 
         if (getCellType(randomPos) == CELL_EMPTY) {
 
         	// assign the cherry position as randomPos, and set randomPos type as CELL_CHERRY
 
-			// YOUR CODE HERE
-			// YOUR CODE HERE
+			cherryPosition = randomPos;
+			setCellType(cherryPosition, CELL_CHERRY);
 
        		break;
         }
@@ -199,6 +201,9 @@ void Game::setCellType(Position pos, CellType cellType)
 	// START CODE HERE
 	//  
 	// END CODE HERE
+	if (pos.isInsideBox(0, 0, width, height)) {
+		squares[pos.y][pos.x] = cellType;
+	}
 }
 
 

AdvProg_L7-Snake/Snake.cpp

@@ -25,6 +25,13 @@ Snake::~Snake()
             p = nextNode;
     }
     */
+    SnakeNode* p = tail;
+
+    while (p != NULL) {
+        SnakeNode* nxt = p->next;
+        delete p;
+        p = nxt;
+    }
 }
 
 // DO NOT CHANGE METHOD
@@ -54,6 +61,8 @@ void Snake::growAtFront(Position newPosition)
     // head of snake grow at new position
 
     /* YOUR CODE HERE */
+    head->next = new SnakeNode(newPosition);
+    head = head->next;
 }
 
 
@@ -84,14 +93,18 @@ void Snake::slideTo(Position newPosition)
 	if (tail->next == nullptr) { 
         // position is assigned by new position.
 		/* YOUR CODE HERE */
+        tail->position = newPosition;
 	}
 	else {
 		SnakeNode *oldTailNode = tail;
 		//cut the old tail off the snake
         /* YOUR CODE HERE */
-
+		tail = tail->next;
+        oldTailNode->next = NULL;
 		// move it to the head of the snake
         /* YOUR CODE HERE */
+        oldTailNode->position = newPosition;
+        head->next = oldTailNode;
 		head = oldTailNode;
 	}
 }
@@ -111,6 +124,7 @@ void Snake::slideTo(Position newPosition)
 void Snake::eatCherry()
 {
 	/* YOUR CODE HERE */
+    cherry++;
 }
 
 /*** 
@@ -142,18 +156,24 @@ void Snake::eatCherry()
 void Snake::move(Direction direction)
 {
     Position newPosition = head->position.move(direction);
-
+    game.snakeMoveTo(newPosition);
     /* YOUR CODE HERE */
 
     // If gameOver, return ; 
     /* YOUR CODE HERE */
+    if (game.isGameOver()) {
+        return;
+    }
 
     // If cherry > 0, cherry descrease one and growAtFront() with newPosition
     if (cherry > 0) {
         /* YOUR CODE HERE */
+        cherry--;
+        growAtFront(newPosition);
     } else {
     	game.snakeLeave(tail->position);
-        /* YOUR CODE HERE */        
+        /* YOUR CODE HERE */ 
+        slideTo(newPosition);       
     }
 }