qt portal as an example the study, a total of three, understood the qt even learn the rudiments

qt_examples
...........\1_aclock
...........\........\1_aclock
...........\........\1_aclock.pro
...........\........\aclock.cpp
...........\........\aclock.h
...........\........\aclock.o
...........\........\main.cpp
...........\........\main.o
...........\........\Makefile
...........\........\moc_aclock.cpp
...........\........\moc_aclock.o
...........\2_addressbook
...........\.............\2_addressbook
...........\.............\2_addressbook.pro
...........\.............\centralwidget.cpp
...........\.............\centralwidget.h
...........\.............\centralwidget.o
...........\.............\main.cpp
...........\.............\main.o
...........\.............\mainwindow.cpp
...........\.............\mainwindow.h
...........\.............\mainwindow.o
...........\.............\Makefile
...........\.............\moc_centralwidget.cpp
...........\.............\moc_centralwidget.o
...........\.............\moc_mainwindow.cpp
...........\.............\moc_mainwindow.o
...........\3_hello
...........\.......\3_hello
...........\.......\3_hello.pro
...........\.......\hello.cpp
...........\.......\hello.h
...........\.......\hello.o
...........\.......\main.cpp
...........\.......\main.o
...........\.......\Makefile
...........\.......\Makefile.in
...........\.......\moc_hello.cpp
...........\.......\moc_hello.o
...........\.......\README

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