Qt编译错误：底层由于接收到操作系统的信号而停止indows_u011218356的博客

    double vec = ((m_game->startpos-endPos)*4).length();
/*    char Info[24];
    sprintf(Info,"%0.2f",sqrt(vec));
    m_lable->setText(QString(Info));*/    double vec = ((m_game->startpos-endPos)*4).