First step for copy constructor

main.cpp

@@ -1,5 +1,7 @@
 #include "mainwindow.h"
 
+#include "path.h"
+
 #include <QApplication>
 
 int main(int argc, char *argv[])

path.cpp

@@ -0,0 +1,13 @@
+#include "path.h"
+
+
+Path::Path(QFile *file){
+    QTextStream in(&file);
+    QString text = in.readAll();
+    ui->textEdit->setText(text);
+    file.close();
+}
+void Path::addStep(){
+
+}
+

sae201.pro

@@ -10,10 +10,12 @@ CONFIG += c++17
 
 SOURCES += \
     main.cpp \
-    mainwindow.cpp
+    mainwindow.cpp \
+    path.cpp
 
 HEADERS += \
-    mainwindow.h
+    mainwindow.h \
+    path.h
 
 FORMS += \
     mainwindow.ui