QMdiSubWindow

模棱两可

#include "mainwindow.h"#include "ui_mainwindow.h"#include "QToolButton"#include "QSpinBox"#include"QTextEdit"#include "QMdiSubWindow"MainWindow::~MainWindow(){    delete ui;}
void MainWindow::on_action_New_triggered(){    QTextEdit *edit =new QTextEdit(this);
    QMdiSubWindow *child=ui->mdiArea->addSubWindow(edit);    child->setWindowTitle(tr("多文档编辑器子窗口"));
    child->show();
}D:\cccc\Mymainwinddow\mainwindow.cpp:55: error: C2146: 语法错误: 缺少“)”(在标识符“child”的前面) 请问这错误是为啥 我完全按着书来的啊