why show Popup function of comboBox is not working?

[Himanshu Meena]

hii i am new to qt and just experimenting with some functions of comboBox.
i have written the following code
ui->comboBox->addItem("mark");
ui->comboBox->count();
ui->showPopup();
in main window() of project
this code has added mark to the comboBox if i write the following code

ui->comboBox->addItem("mark");

but count() and showPopup() are not working and following error is coming.
class Ui::MainWindow has no member named show Popup.

[Bonnie]

count() just return the number of items as the result, what do you expect it to work?
showPopup() should be called on the combo box, so ui->comboBox->showPopup().
Are you also new to C++? Feels like you need learn some basics first.