How can I display of 2 different QTextEdit values into a QLabel - c++

Question

Im trying to simply display of 2 different QTextEdit value into a QLabel. I have tried for a single QTextEdit but couldn't display the value of both QTextEdit.
void MainWindow::on_pushButton_clicked()
{
ui->label_az->setText(ui->textEdit_ra1->toPlainText());
ui->label_az->setText(ui->textEdit_ra2->toPlainText());
}
It doesn't display the QTextEdit values when I click on pushbutton. Thank you in advance

Answer 1

Just to summarize our comments into a single post: QLabel::setText replaces the content of the label, so you have to create the whole string before and set it once. Code below will do it:
void MainWindow::on_pushButton_clicked()
{
ui->label_az->setText(
ui->textEdit_ra1->toPlainText() +
" " + // use here the separator you find more convenient
ui->textEdit_ra2->toPlainText());
}

Answer 2

The second setText() call replaces the label's text. You want to combine both texts into a single label text, like this:
label->setText(text_1->toPlainText() + "\n" + text_2->toPlainText());
Here's a complete example program, to give context:
#include <QWidget>
#include <QBoxLayout>
#include <QTextEdit>
#include <QPushButton>
#include <QLabel>
#include <QApplication>
#include <memory>
int main(int argc, char **argv)
{
QApplication app{argc, argv};
const auto w = std::make_unique<QWidget>();
const auto window = w.get();
const auto layout = new QVBoxLayout(window);
const auto text_1 = new QTextEdit(window);
layout->addWidget(text_1);
const auto text_2 = new QTextEdit(window);
layout->addWidget(text_2);
const auto button = new QPushButton("Push Me!", window);
layout->addWidget(button);
const auto label = new QLabel(window);
layout->addWidget(label);
QObject::connect(button, &QPushButton::pressed,
label, [=]() { label->setText(text_1->toPlainText() + "\n" + text_2->toPlainText()); });
window->show();
return app.exec();
}