Array object constructor error

[Kycho]

Array object constructor error.
At runtime, the value of the array is determined,
I do not know how to solve this problem.

    int setRoom = 9;
    RoomButton *room = new RoomButton[setRoom];  // RoomButton Inheritance QPushButton
    QString roomNum[setRoom];
    roomNum[0] = "201";
    roomNum[1] = "202";
    roomNum[2] = "203";
    roomNum[3] = "205";
    roomNum[4] = "206";
    roomNum[5] = "207";
    roomNum[6] = "208";
    roomNum[7] = "209";
    roomNum[8] = "210";

    for(int ii =0; ii<3; ii++){
        for (int i =0; i<3; i++){
            ui->roomSeletGLayout->addWidget(&room[ii*3+i],ii,i); // Good work!
            room[ii*3+i]->setText(roomNum[ii*3+i]); // This is error...T^T
        }
    }

Thanks in advance for your help.

[koahnig]

@Kycho

What is the exact error message?

Note, dynamic size of arrays as used there requires at least C++ standard of 99 or more. What are your compile settings?

[Kycho]

@koahnig

Thank you for your reply.

Error message is as follows.

/home/jiminkim/QtProject/SVD110_Tesst/mainwindow.cpp:30: error: base operand of ‘->’ has non-pointer type ‘RoomButton’
             room[ii*3+i]->setText(roomNum[ii*3+i]); // it is error...T^T
                         ^~

/home/jiminkim/QtProject/SVD110_Tesst/mainwindow.cpp:30: error: member reference type 'RoomButton' is not a pointer; did you mean to use '.'?

I do not know if C ++ 99 or later is correct....
But recently installed.
Using compiler (Linux Ubuntu)

[koahnig]

@Kycho

You would need a CONFIG settings like

CONFIG += c++11

for C++11 standard. Depending on your actual compiler version this might be already default.

The syntax of

 RoomButton *room = new RoomButton[setRoom]; 

is wrong for you try to do. It should be more like

 RoomButton *room[setRoom];
for ( int i = 0; i < setRoom; ++i )
    RoomButton[i]= new RoomButton; 

However, I recommend using a container such as std::vector or QVector for handling this.

Note: above source is brain to keyboard not tested.

[Kycho]

@koahnig

Thank you!!!!!!!!!!!!!!!!!!