如何在bool值为真后停止增加变量

我正在制作一款游戏，要求玩家按下a、B或C键，让三个盒子中的一个消失。如果一个盒子消失，显示出一个更小的盒子，用户就赢了。我很难做到这样，当用户获胜时，总猜测和错误猜测的计数器不再增加，因为此时，人们可以一直按下一个按钮来不断增加这两个变量(分别被恰当地命名为totalguess和wrongguess)。有人知道我怎样才能完成这个任务吗?我相信这是相对简单的，但它把我逼疯了。非常感谢。

这是我的main.cpp:

#include "Box.h"
#include "Font.h"
#include "Camera.h"
#include "Time.h"
#include <vector>
#include <sstream>
using namespace std;
#include "vgl.h"
using namespace glm;
#define SPACEBAR_KEY 32
#define ESCAPE_KEY 033
vector<Box * > boxes;
Camera* camera;
Font* font;
int numGenerator, guesses, totalGuesses, rounds, wrongGuesses, wrongGuessesRound, oldGuess, oldWrongGuess;
bool win;
void closeApp()
{
    delete camera;
    delete font;

    for (auto it = boxes.begin(); it != boxes.end(); ++it)
        delete (*it);

}
void startNewGame()
{
    rounds++;
    win = false;
    guesses = 0;
    wrongGuesses = 0;
    wrongGuessesRound = 0;
    numGenerator = rand() % 3;
    boxes[1]->Visible = true;
    boxes[2]->Visible = true;
    boxes[3]->Visible = true;
    if (numGenerator == 0)
    {
        boxes[0]->Position = vec3(0.0f, -3.0f, 0.0f);
    }
    else if (numGenerator == 1)
    {
        boxes[0]->Position = vec3(0.0f, 0.0f, 0.0f);
    }
    else
    {
        boxes[0]->Position = vec3(0.0f, 3.0f, 0.0f);
    }
}
void keyboard(unsigned char key, int x, int y)
{
    switch (key) 
    {
        case ESCAPE_KEY:  // ASCII Escape Key Code
            closeApp();
            exit(EXIT_SUCCESS);
            break;
        case 'a':
            boxes[1]->Visible = false;
            if (boxes[0]->Position != vec3(0.0f, -3.0f, 0.0f))
            {
                guesses++;
                wrongGuesses++;
                wrongGuessesRound++;
                totalGuesses++;
            }
            else
            {
                win = true;
                //totalGuesses++;
                //guesses++;
            }
            glutPostRedisplay();
            break;
        case 'b':
            boxes[2]->Visible = false;
            if (boxes[0]->Position != vec3(0.0f, 0.0f, 0.0f))
            {
                guesses++;
                wrongGuesses++;
                totalGuesses++;
                wrongGuessesRound++;
            }
            else
            {
                win = true;
                //totalGuesses++;
                //guesses++;
            }
            glutPostRedisplay();
            break;
        case 'c':
            boxes[3]->Visible = false;
            if (boxes[0]->Position != vec3(0.0f, 3.0f, 0.0f))
            {
                guesses++;
                wrongGuesses++;
                wrongGuessesRound++;
                totalGuesses++;
            }
            else
            {
                win = true;
                //totalGuesses++;
                //guesses++;
            }
            glutPostRedisplay();
            break;
        case 'r':
            if (win)
            {
                startNewGame();
            }
            glutPostRedisplay();
            break;
    }
}

void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    font->printText("Guessing Game!", 260, 560, 20);
    font->printText("Press A, B, or C to make one of the boxes disappear!", 10, 540, 15);
    font->printText("Try to find the small cube! Press 'r' to restart!", 30, 520, 15);
    if (win)
    {
        font->printText("You win!", 275, 480, 30);
        guesses = oldGuess;
        wrongGuesses += 0;
    }
    if (guesses >= 3)
    {
        guesses = 3;
    }
    /*if (wrongGuessesRound >= 3)
    {
        wrongGuessesRound = 3;
    }*/
    std::stringstream ss1;
    ss1 << "Guesses: " << guesses;
    font->printText(ss1.str().c_str(), 20, 350, 15);
    std::stringstream ss2;
    ss2 << "Rounds played: " << rounds;
    font->printText(ss2.str().c_str(), 20, 330, 15);
    std::stringstream ss3;
    ss3 << "Wrong guesses: " << wrongGuesses;
    font->printText(ss3.str().c_str(), 20, 290, 15);
    std::stringstream ss4;
    ss4 << "Total guesses: " << totalGuesses;
    font->printText(ss4.str().c_str(), 20, 310, 15);
    //std::stringstream ss5;
    //ss5 << "Round wrong guesses: " << wrongGuessesRound;
    //font->printText(ss5.str().c_str(), 20, 270, 15);

    boxes[0]->Draw(camera->ProjectionMatrix, camera->ViewMatrix);
    boxes[1]->Draw(camera->ProjectionMatrix, camera->ViewMatrix);
    boxes[2]->Draw(camera->ProjectionMatrix, camera->ViewMatrix);
    boxes[3]->Draw(camera->ProjectionMatrix, camera->ViewMatrix);

    glutSwapBuffers();
}
void init()
{
    glClearColor(0.0f, 0.0f, 0.4f, 0.0f);
    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LESS);
    glEnable(GL_CULL_FACE);
    srand(time(NULL));
    font = new Font();
    camera = new Camera();
    camera->ViewMatrix = glm::lookAt(glm::vec3(0, 0, 20), glm::vec3(0, 0, 0), glm::vec3(0, 1, 0));

    VertexBufferData vertexBufferData = VertexBufferData("Data\Models\Objects.xml");
    boxes.push_back(new Box(vertexBufferData, glm::vec3(0.0f, 0.0f, 0.0f), "data/images/wood.bmp", "Data\Shaders\Vertex.shader", "Data\Shaders\Fragment.shader", vec3(0.4f, 0.4f, 0.4f), true));
    boxes.push_back(new Box(vertexBufferData, glm::vec3(0.0f, -3.0f, 0.0f), "data/images/ground.tga", "Data\Shaders\Vertex.shader", "Data\Shaders\Fragment.shader", vec3(1.0f, 1.0f, 1.0f), true));
    boxes.push_back(new Box(vertexBufferData,glm::vec3(0.0f, 0.0f, 0.0f), "data/images/metal.bmp", "Data\Shaders\Vertex.shader", "Data\Shaders\Fragment.shader", vec3(1.0f, 1.0f, 1.0f), true));
    boxes.push_back(new Box(vertexBufferData, glm::vec3(0.0f, 3.0f, 0.0f), "data/images/brick.bmp", "Data\Shaders\Vertex.shader", "Data\Shaders\Fragment.shader", vec3(1.0f, 1.0f, 1.0f), true));
    startNewGame();
}

int main(int argc, char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGBA | GLUT_DEPTH);
    glutInitWindowSize(1024, 768);
    glutInitContextProfile(GLUT_CORE_PROFILE);
    glutCreateWindow("Satterwhite_Project_5");

    if (glewInit())
    {
        cerr << "Unable to init glew" << endl;
        exit(EXIT_FAILURE);
    }
    init();
    glutDisplayFunc(display);
    glutKeyboardFunc(keyboard);
    glutMainLoop();
    return 0;
}