友元实战访问类模板

/* 友元实战访问类模板 */

#include "dialog.h"
#include <QApplication>
#include<QPushButton>
#include<QLabel>

template <class T>
class mywindow
{
private:
    T *p;
    void show()
    {
       p->show();
    }
    friend  void run( mywindow <Dialog> &d);

public:
    mywindow()
    {
       p= new T;
    }

};

void run( mywindow <Dialog> &d)
{
    d.show();
}

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    mywindow <Dialog>   my1;

    run(my1);

    return a.exec();
}