调试断言失败，可能的指针问题？

Question

这是我认为是问题原因的类中的一个函数：

void Game::processGameScreen()
{
    cout << "\nGAME PROCESS STARTED";
    tetriminoInPlay = new Tetrimino;
    tetriminoOnDeck = new Tetrimino;
    int count = 0;
while (window.isOpen() && gameWell.topReached() == false)
{
    //check for events and create tetrimino pointers
    sf::Event event;

    while (window.pollEvent(event)) {
        //check for arrow key presses
        if (event.type == sf::Event::KeyPressed && event.key.code == sf::Keyboard::Up)
        {
            tetriminoInPlay->rotateRight();
            if (gameWell.tetriminoFit(*tetriminoInPlay) == false)
                tetriminoInPlay->rotateLeft();
        }
        else if (event.type == sf::Event::KeyPressed && event.key.code == sf::Keyboard::Left)
        {
            tetriminoInPlay->moveLeft();
            if (gameWell.tetriminoFit(*tetriminoInPlay) == false)
                tetriminoInPlay->moveRight();
        }
        else if (event.type == sf::Event::KeyPressed && event.key.code == sf::Keyboard::Right)
        {
            tetriminoInPlay->moveRight();
            if (gameWell.tetriminoFit(*tetriminoInPlay) == false)
                tetriminoInPlay->moveLeft();
        }
        else if (event.type == sf::Event::Closed)
            window.close();

        //counter to move pieces down
        cout << "\n" << count;
        if (count % 15 == 0 ) {
            cout << "\nMOVING DOWN";
            tetriminoInPlay->moveDown();
            //check if it fits
            if (gameWell.tetriminoFit(*tetriminoInPlay) == false) {
                tetriminoInPlay->moveUp();
                gameWell.addTetriminoToWell(*tetriminoOnDeck);
                delete tetriminoInPlay;
                score = score + gameWell.clearFullRows(); //add combo scoring later
                //check for game over
                if (gameWell.topReached() == false) {
                    tetriminoInPlay = tetriminoOnDeck;
                    tetriminoInPlay->setLocation(0,4);
                    delete tetriminoOnDeck; 
                    tetriminoOnDeck = new Tetrimino;
                }
            }
        }
        count++;
        //clear window, draw well, tetro, window.display
        window.clear(sf::Color::White);
        //draw tetriminoOnDeck !!!Figure out where to draw this at some point!!!
        //drawTetrimino(tetriminoOnDeck, LAYOUT_BOARD_TOP, LAYOUT_BOARD_LEFT, BLOCK_SIZE_PIXELS);
        drawWell(gameWell, LAYOUT_BOARD_TOP, LAYOUT_BOARD_LEFT, BLOCK_SIZE_PIXELS);
        drawTetrimino(tetriminoInPlay, LAYOUT_BOARD_TOP, LAYOUT_BOARD_LEFT, BLOCK_SIZE_PIXELS);
        drawScore(score, 50, 50);
        window.display();

    }   
}
}

我相信问题出在某个地方的指针上。我无法找到确切的问题，甚至无法确定问题发生在什么情况下，因为它发生的时间似乎不一致。

这也出现在错误中：

表达式：_BLOCK_TYPE_IS_VALID(pHead->nBlockUse)

如果这很重要，我正在使用 SFML 图形库。

Answer 1

tetriminoInPlay = tetriminoOnDeck;
tetriminoInPlay->setLocation(0,4);
delete tetriminoOnDeck; 
tetriminoOnDeck = new Tetrimino;

在这行之后，tetriminoInPlay 指向内存中您不再应该使用的空间。然而，下一次迭代，你使用这个变量。你需要解决这个问题。

您还需要调整时间。计数器是一种糟糕的做事方式，因为您的游戏在慢速机器上会更容易，而在高端游戏计算机上则无法玩。看看here 如何在游戏中实现时间。