A calculator MacOSX under implementation, the functionality is very simple. The reference for beginners. http://www.oschina.net/code/snippet_107536_8434

OVC.CAL
.......\.DS_Store
__MACOSX
........\OVC.CAL
........\.......\._.DS_Store
OVC.CAL\build
.......\.....\.DS_Store
__MACOSX\OVC.CAL\build
........\.......\.....\._.DS_Store
OVC.CAL\build\Debug
.......\.....\.....\Exam3.app
.......\.....\.....\.........\Contents
.......\.....\.....\.........\........\Info.plist
__MACOSX\OVC.CAL\build\Debug
........\.......\.....\.....\Exam3.app
........\.......\.....\.....\.........\Contents
........\.......\.....\.....\.........\........\._Info.plist
OVC.CAL\build\Debug\Exam3.app\Contents\MacOS
.......\.....\.....\.........\........\.....\Exam3
__MACOSX\OVC.CAL\build\Debug\Exam3.app\Contents\MacOS
........\.......\.....\.....\.........\........\.....\._Exam3
........\.......\.....\.....\.........\........\._MacOS
OVC.CAL\build\Debug\Exam3.app\Contents\PkgInfo
__MACOSX\OVC.CAL\build\Debug\Exam3.app\Contents\._PkgInfo
OVC.CAL\build\Debug\Exam3.app\Contents\Resources
.......\.....\.....\.........\........\.........\English.lproj
.......\.....\.....\.........\........\.........\.............\InfoPlist.strings
__MACOSX\OVC.CAL\build\Debug\Exam3.app\Contents\Resources
........\.......\.....\.....\.........\........\.........\English.lproj
........\.......\.....\.....\.........\........\.........\.............\._InfoPlist.strings
OVC.CAL\build\Debug\Exam3.app\Contents\Resources\English.lproj\MainMenu.nib
__MACOSX\OVC.CAL\build\Debug\Exam3.app\Contents\Resources\English.lproj\._MainMenu.nib
........\.......\.....\.....\.........\........\.........\._English.lproj
........\.......\.....\.....\.........\........\._Resources
........\.......\.....\.....\.........\._Contents
........\.......\.....\.....\._Exam3.app
........\.......\.....\._Debug
OVC.CAL\build\Exam3.build
.......\.....\...........\Debug
.......\.....\...........\.....\Exam3.build
.......\.....\...........\.....\...........\Exam3-all-target-headers.hmap
__MACOSX\OVC.CAL\build\Exam3.build
........\.......\.....\...........\Debug
........\.......\.....\...........\.....\Exam3.build
........\.......\.....\...........\.....\...........\._Exam3-all-target-headers.hmap
OVC.CAL\build\Exam3.build\Debug\Exam3.build\Exam3-generated-files.hmap
__MACOSX\OVC.CAL\build\Exam3.build\Debug\Exam3.build\._Exam3-generated-files.hmap
OVC.CAL\build\Exam3.build\Debug\Exam3.build\Exam3-own-target-headers.hmap
__MACOSX\OVC.CAL\build\Exam3.build\Debug\Exam3.build\._Exam3-own-target-headers.hmap
OVC.CAL\build\Exam3.build\Debug\Exam3.build\Exam3-project-headers.hmap
__MACOSX\OVC.CAL\build\Exam3.build\Debug\Exam3.build\._Exam3-project-headers.hmap
OVC.CAL\build\Exam3.build\Debug\Exam3.build\Exam3.dep
__MACOSX\OVC.CAL\build\Exam3.build\Debug\Exam3.build\._Exam3.dep
OVC.CAL\build\Exam3.build\Debug\Exam3.build\Exam3.hmap
__MACOSX\OVC.CAL\build\Exam3.build\Debug\Exam3.build\._Exam3.hmap
OVC.CAL\build\Exam3.build\Debug\Exam3.build\Exam3~.dep
__MACOSX\OVC.CAL\build\Exam3.build\Debug\Exam3.build\._Exam3~.dep
OVC.CAL\build\Exam3.build\Debug\Exam3.build\Objects-normal
.......\.....\...........\.....\...........\..............\i386
.......\.....\...........\.....\...........\..............\....\Exam3.LinkFileList
__MACOSX\OVC.CAL\build\Exam3.build\Debug\Exam3.build\Objects-normal
........\.......\.....\...........\.....\...........\..............\i386
........\.......\.....\...........\.....\...........\..............\....\._Exam3.LinkFileList
OVC.CAL\build\Exam3.build\Debug\Exam3.build\Objects-normal\i386\MACalculator.o
__MACOSX\OVC.CAL\build\Exam3.build\Debug\Exam3.build\Objects-normal\i386\._MACalculator.o
OVC.CAL\build\Exam3.build\Debug\Exam3.build\Objects-normal\i386\main.o
__MACOSX\OVC.CAL\build\Exam3.build\Debug\Exam3.build\Objects-normal\i386\._main.o
........\.......\.....\...........\.....\...........\..............\._i386
........\.......\.....\...........\.....\...........\._Objects-normal
........\.......\.....\...........\.....\._Exam3.build
........\.......\.....\...........\._Debug
OVC.CAL\build\Exam3.build\Exam3.pbxindex
.......\.....\...........\..............\categories.pbxbtree
__MACOSX\OVC.CAL\build\Exam3.build\Exam3.pbxindex
........\.......\.

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