C在控制台上实现鼠标画图功能

#include 
#include 
#include 
HANDLE hOut;
HANDLE hIn;
void ClearScreen(void);
void DispMousePos(COORD pos); // 在第24行显示鼠标位置
int main()
{
    hOut = GetStdHandle(STD_OUTPUT_HANDLE); // 获取标准输出设备句柄
    hIn = GetStdHandle(STD_INPUT_HANDLE); // 获取标准输入设备句柄
    WORD att = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_INTENSITY | BACKGROUND_BLUE ;
    // 背景是蓝色，文本颜色是黄色
    SetConsoleTextAttribute(hOut, att);
    ClearScreen(); // 清屏
    INPUT_RECORD mouseRec;
    DWORD state = 0, res;
    COORD pos = {0, 0};
    //不断对鼠标这个事件进行检测
    while(1)
    {
        ReadConsoleInput(hIn, &mouseRec, 1, &res);
        if (mouseRec.EventType == MOUSE_EVENT)
        {
            if (mouseRec.Event.MouseEvent.dwEventFlags == DOUBLE_CLICK)
               // break; // 双击鼠标退出循环
             ClearScreen();
            pos = mouseRec.Event.MouseEvent.dwMousePosition;
            //左按键
            if (mouseRec.Event.MouseEvent.dwButtonState == FROM_LEFT_1ST_BUTTON_PRESSED)
                FillConsoleOutputCharacter(hOut, 'A', 1, pos, NULL);
        }
    }
    pos.X = pos.Y = 0;
    SetConsoleCursorPosition(hOut, pos); // 设置光标位置
    CloseHandle(hOut); // 关闭标准输出设备句柄
    CloseHandle(hIn); // 关闭标准输入设备句柄
}
void DispMousePos(COORD pos) // 在第24行显示鼠标位置
{
    CONSOLE_SCREEN_BUFFER_INFO bInfo;
    GetConsoleScreenBufferInfo( hOut, &bInfo );
    COORD home = {0, 24};
    WORD att0 = BACKGROUND_INTENSITY ;
    FillConsoleOutputAttribute(hOut, att0, bInfo.dwSize.X, home, NULL);
    FillConsoleOutputCharacter(hOut, ' ', bInfo.dwSize.X, home, NULL);
    char s[20];
    sprintf(s,"X = %2lu, Y = %2lu",pos.X, pos.Y);
    SetConsoleTextAttribute(hOut, att0);
    SetConsoleCursorPosition(hOut, home);
    WriteConsole(hOut, s, strlen(s), NULL, NULL);
    SetConsoleTextAttribute(hOut, bInfo.wAttributes); // 恢复原来的属性
    SetConsoleCursorPosition(hOut, bInfo.dwCursorPosition); // 恢复原来的光标位置
}
void ClearScreen(void)
{
    CONSOLE_SCREEN_BUFFER_INFO bInfo;
    GetConsoleScreenBufferInfo( hOut, &bInfo );
    COORD home = {0, 0};
    unsigned long size = bInfo.dwSize.X * bInfo.dwSize.Y;
    FillConsoleOutputAttribute(hOut, bInfo.wAttributes, size, home, NULL);
    FillConsoleOutputCharacter(hOut, ' ', size, home, NULL);
}