c++井字棋游戏代码easyx

C++井字棋游戏代码可以使用EasyX图形库进行实现，下面是一个简单的示例代码：

#include <graphics.h>
#include <conio.h>

const int kBoardSize = 3;  // 棋盘大小

// 绘制棋盘
void DrawBoard() {
    cleardevice();  // 清空屏幕

    int width = getwidth() / kBoardSize;
    int height = getheight() / kBoardSize;

    // 绘制横线
    for (int i = 1; i < kBoardSize; i++) {
        line(0, i * height, getwidth(), i * height);
    }

    // 绘制竖线
    for (int i = 1; i < kBoardSize; i++) {
        line(i * width, 0, i * width, getheight());
    }
}

// 下棋
void PlayChess(int row, int col, bool is_black) {
    int x = col * getwidth() / kBoardSize + getwidth() / kBoardSize / 2;
    int y = row * getheight() / kBoardSize + getheight() / kBoardSize / 2;

    if (is_black) {
        setcolor(BLACK);
        circle(x, y, getwidth() / kBoardSize / 2 - 10);
    } else {
        setcolor(WHITE);
        line(x - getwidth() / kBoardSize / 2 + 10, y - getheight() / kBoardSize / 2 + 10,
            x + getwidth() / kBoardSize / 2 - 10, y + getheight() / kBoardSize / 2 - 10);
        line(x - getwidth() / kBoardSize / 2 + 10, y + getheight() / kBoardSize / 2 - 10,
            x + getwidth() / kBoardSize / 2 - 10, y - getheight() / kBoardSize / 2 + 10);
    }
}

int main() {
    initgraph(600, 600);

    DrawBoard();

    bool is_black = true;  // 黑棋先手

    while (true) {
        if (_kbhit()) {  // 如果有按键按下
            char ch = _getch();
            if (ch == 27) break;  // 如果是Esc键，退出游戏

            int row = -1;
            int col = -1;
            bool can_put = false;

            switch (ch) {
                case 'q': row = 0; col = 0; can_put = true; break;
                case 'w': row = 0; col = 1; can_put = true; break;
                case 'e': row = 0; col = 2; can_put = true; break;
                case 'a': row = 1; col = 0; can_put = true; break;
                case 's': row = 1; col = 1; can_put = true; break;
                case 'd': row = 1; col = 2; can_put = true; break;
                case 'z': row = 2; col = 0; can_put = true; break;
                case 'x': row = 2; col = 1; can_put = true; break;
                case 'c': row = 2; col = 2; can_put = true; break;
            }

            if (can_put) {
                PlayChess(row, col, is_black);
                is_black = !is_black;
            }
        }
    }

    closegraph();
    return 0;
}

此示例中，通过`initgraph`函数初始化图形界面，然后在`DrawBoard`函数中绘制棋盘，`PlayChess`函数用于在棋盘上下棋。在`main`函数中，通过`_kbhit`函数检测键盘是否有按键按下，然后根据按键的不同来确定落子的位置，通过`PlayChess`函数在棋盘上下棋，并通过`is_black`变量来控制黑白棋的交替。当按下Esc键时，游戏退出。