Update 第一章代码01

第一章代码01

-1.dialog.cpp
+1.dialog.cpp
@@ -26,3 +26,31 @@ void Dialog::on_pushButton_clicked()
     double area=valueInt*valueInt*PI;
     ui->label_2->setText(tempStr.setNum(area));
 }
+
+
+
+2.dialog.h
+#ifndef DIALOG_H
+#define DIALOG_H
+
+#include <QDialog>
+
+QT_BEGIN_NAMESPACE
+namespace Ui { class Dialog; }
+QT_END_NAMESPACE
+
+class Dialog : public QDialog
+{
+    Q_OBJECT
+
+public:
+    Dialog(QWidget *parent = nullptr);
+    ~Dialog();
+
+private slots:
+    void on_pushButton_clicked();
+
+private:
+    Ui::Dialog *ui;
+};
+#endif // DIALOG_H
\ No newline at end of file