A simple calculator source code, can achieve normal operation

temp\about.cpp
....\about.h
....\about.ui
....\Capture.ico
....\debug\about.o
....\.....\main.o
....\.....\mainwindow.o
....\.....\moc_about.cpp
....\.....\moc_about.o
....\.....\moc_mainwindow.cpp
....\.....\moc_mainwindow.o
....\.....\op.o
....\.....\qrc_res.cpp
....\.....\qrc_res.o
....\.....\qrc_spreadsheet.cpp
....\.....\qrc_spreadsheet.o
....\.....\temp.exe
....\l\l.pro
....\.\l.pro.user
....\.\main.cpp
....\.\mainwindow.cpp
....\.\mainwindow.h
....\.\mainwindow.ui
....\main.cpp
....\mainwindow.cpp
....\mainwindow.h
....\mainwindow.ui
....\Makefile
....\Makefile.Debug
....\Makefile.Release
....\object_script.temp.Debug
....\object_script.temp.Release
....\op.cpp
....\op.h
....\qtdemo.ico
....\res.qrc
....\temp.pro
....\temp.pro.user
....\ui_about.h
....\ui_mainwindow.h
....\debug
....\l
....\release
temp

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