明显调用的括号前面的表达式必须具有（指针）函数typpe

Question

//variables
bool GetSelectedSquare = 0;
bool UpdateBoard = 0;
bool isXTurn = true; 

uint8_t chosenSquare = GetSelectedSquare;     //some function that gets player's input 
UpdateBoard (chosenSquare), isXTurn ? 'X' : 'O'; //check if is X's turn, if not use O
isXTurn = !isXTurn;  

我遇到UpdateBoard行的问题，检查其X的转弯是否给出了标题中的错误。

Answer 1

是100％C ++在视觉工作室中使用它但是我想要做的是一个井字游戏，鼠标点击将在X和O之间交替。我可以发布我的整个代码但是那里有＃s很多if语句因为这是我们老师希望我们现在写的方式。

#include <GameDev2D.h>

//Function prototypes
void Init();
void Shutdown();
void Update(double delta);
void Draw();
int MouseClicked(float x, float y);

//variables
int state[9] = {};
int Click[9] = {};
bool GetSelectedSquare = 0;
bool UpdateBoard = 0;
bool isXTurn = true; 

//Entry point to the application
int WINAPI WinMain(HINSTANCE aCurrentInstance, HINSTANCE aPreviousInstance, LPSTR aCommandLine, int aCommandShow)
{
    //Run GameDev2D, pass in the Init, Shutdown, Update and Draw methods
    GameDev2D::Run(Init, Shutdown, Update, Draw);
    return 0;
}

void Init()
{
    GameDev2D::RegisterLeftMouseButtonPressedCallback(MouseClicked);
    GameDev2D::LoadTexture("x");
    GameDev2D::LoadTexture("o");

}

void Shutdown()
{
    GameDev2D::UnloadTexture("x");
    GameDev2D::UnloadTexture("o");

}

void Update(double aDelta)
{

}

void Draw()
{
    //Guide lines
    GameDev2D::DrawRectangle(256.0f, 0.0f, 10.0f, 768.0f, 0.0f, GameDev2D::Color::BlackColor(), true);
    GameDev2D::DrawRectangle(512.0f, 0.0f, 10.0f, 768.0f, 0.0f, GameDev2D::Color::BlackColor(), true);
    GameDev2D::DrawRectangle(0.0f, 256.0f, 768.0f, 10.0f, 0.0f, GameDev2D::Color::BlackColor(), true);
    GameDev2D::DrawRectangle(0.0f, 512.0f, 768.0f, 10.0f, 0.0f, GameDev2D::Color::BlackColor(), true);



    //Drawing in diffrent boxes
    if (state[0] == 1)
    {
        GameDev2D::DrawTexture("x", 0.0f, 0.0f, 0.0f); // row 1 / 1 
    }
     if (state[0] == 2)
    {
        GameDev2D::DrawTexture("o", 0.0f, 0.0f, 0.0f);
    }

    if (state[1] == 1)
    {
        GameDev2D::DrawTexture("x", 256.0f, 0.0f, 0.0f); // row 1 / 2
    }
    if (state[1] == 2)
    {
        GameDev2D::DrawTexture("o", 256.0f, 0.0f, 0.0f);
    }

    if (state[2] == 1)
    {
        GameDev2D::DrawTexture("x", 512.0f, 0.0f, 0.0f); // row 1 / 3
    }
    if (state[2] == 2)
    {
        GameDev2D::DrawTexture("o", 512.0f, 0.0f, 0.0f);
    }

    if (state[3] == 1)
    {
        GameDev2D::DrawTexture("x", 0.0f, 256.0f, 0.0f); // row 2 / 1
    }
    if (state[3] == 2)
    {
        GameDev2D::DrawTexture("o", 0.0f, 256.0f, 0.0f);
    }

    if (state[4] == 1)
    {
        GameDev2D::DrawTexture("x", 256.0f, 256.0f, 0.0f); // row 2 / 2
    }
    if (state[4] == 2)
    {
        GameDev2D::DrawTexture("o", 256.0f, 256.0f, 0.0f);
    }

    if (state[5] == 1)
    {
        GameDev2D::DrawTexture("x", 512.0f, 256.0f, 0.0f); // row 2 / 3
    }
    if (state[5] == 2)
    {
        GameDev2D::DrawTexture("o", 512.0f, 256.0f, 0.0f);
    }

    if (state[6] == 1)
    {
        GameDev2D::DrawTexture("x", 0.0f, 512.0f, 0.0f); // row 3 / 1
    }
    if (state[6] == 2)
    {
        GameDev2D::DrawTexture("o", 0.0f, 512.0f, 0.0f);
    }

    if (state[7] == 1)
    {
        GameDev2D::DrawTexture("x", 256.0f, 512.0f, 0.0f); // row 3 / 2
    }
    if (state[7] == 2)
    {
        GameDev2D::DrawTexture("o", 256.0f, 512.0f, 0.0f);
    }

    if (state[8] == 1)
    {
        GameDev2D::DrawTexture("x", 512.0f, 512.0f, 0.0f); // row 3 / 3
    }
    if (state[8] == 2)
    {
        GameDev2D::DrawTexture("o", 512.0f, 512.0f, 0.0f);
    }

}

int MouseClicked(float x, float y) 
{
uint8_t chosenSquare = GetSelectedSquare;     //some function that gets player's input 
UpdateBoard (chosenSquare), isXTurn ? 'X' : 'O'; //check if is X's turn, if not use O
isXTurn = !isXTurn;                             //alternate turns

{
    if (x > 0 && x < 256 && y > 0 && y < 256)
    {
        state[0] = 1 || 2;
    }

    if (x > 256 && x < 512 && y > 0 && y < 256)
    {
        if (state[1] == 0)
        {
            state[1] = 1 || 2;
        }
    }

    if (x > 512 && x < 768 && y > 0 && y < 256)
    {
        if (state[2] == 0)
        {
            state[2] = 1 || 2;
        }
    }

    if (x > 0 && x < 256 && y > 256 && y < 512)
    {
        if (state[3] == 0)
        {
            state[3] = 1 || 2;
        }
    }

    if (x > 256 && x < 512 && y > 256 && y < 512)
    {
        if (state[4] == 0)
        {
            state[4] = 1 || 2;
        }
    }

    if (x > 512 && x < 768 && y > 256 && y < 512)
    {
        if (state[5] == 0)
        {
            state[5] = 1 || 2;
        }
    }

    if (x > 0 && x < 256 && y > 512 && y < 768)
    {
        if (state[6] == 0)
        {
            state[6] = 1 || 2;
        }
    }

    if (x > 256 && x < 512 && y > 512 && y < 768)
    {
        if (state[7] == 0)
        {
            state[7] = 1 || 2;

        }
    }

    if (x > 512 && x < 768 && y > 512 && y < 768)
    {
        if (state[8] == 0)
        {
            state[8] = 1 || 2;
        }
    }
}
     return 0;
}