File list (Check if you may need any files):
Gauss
.....\.DS_Store
__MACOSX
........\Gauss
........\.....\._.DS_Store
Gauss\Gauss
.....\.....\B.txt
__MACOSX\Gauss\Gauss
........\.....\.....\._B.txt
Gauss\Gauss\main.cpp
__MACOSX\Gauss\Gauss\._main.cpp
Gauss\Gauss\Matrix.cpp
__MACOSX\Gauss\Gauss\._Matrix.cpp
Gauss\Gauss\Matrix.h
__MACOSX\Gauss\Gauss\._Matrix.h
Gauss\Gauss\Matrix.txt
__MACOSX\Gauss\Gauss\._Matrix.txt
Gauss\Gauss\test.txt
__MACOSX\Gauss\Gauss\._test.txt
........\.....\._Gauss
Gauss\Gauss.xcodeproj
.....\...............\project.pbxproj
__MACOSX\Gauss\Gauss.xcodeproj
........\.....\...............\._project.pbxproj
Gauss\Gauss.xcodeproj\project.xcworkspace
.....\...............\...................\contents.xcworkspacedata
__MACOSX\Gauss\Gauss.xcodeproj\project.xcworkspace
........\.....\...............\...................\._contents.xcworkspacedata
Gauss\Gauss.xcodeproj\project.xcworkspace\xcuserdata
.....\...............\...................\..........\yingliu.xcuserdatad
.....\...............\...................\..........\...................\UserInterfaceState.xcuserstate
__MACOSX\Gauss\Gauss.xcodeproj\project.xcworkspace\xcuserdata
........\.....\...............\...................\..........\yingliu.xcuserdatad
........\.....\...............\...................\..........\...................\._UserInterfaceState.xcuserstate
........\.....\...............\...................\..........\._yingliu.xcuserdatad
........\.....\...............\...................\._xcuserdata
........\.....\...............\._project.xcworkspace
Gauss\Gauss.xcodeproj\xcuserdata
.....\...............\..........\yingliu.xcuserdatad
.....\...............\..........\...................\xcdebugger
.....\...............\..........\...................\..........\Breakpoints_v2.xcbkptlist
__MACOSX\Gauss\Gauss.xcodeproj\xcuserdata
........\.....\...............\..........\yingliu.xcuserdatad
........\.....\...............\..........\...................\xcdebugger
........\.....\...............\..........\...................\..........\._Breakpoints_v2.xcbkptlist
........\.....\...............\..........\...................\._xcdebugger
Gauss\Gauss.xcodeproj\xcuserdata\yingliu.xcuserdatad\xcschemes
.....\...............\..........\...................\.........\Gauss.xcscheme
__MACOSX\Gauss\Gauss.xcodeproj\xcuserdata\yingliu.xcuserdatad\xcschemes
........\.....\...............\..........\...................\.........\._Gauss.xcscheme
Gauss\Gauss.xcodeproj\xcuserdata\yingliu.xcuserdatad\xcschemes\xcschememanagement.plist
__MACOSX\Gauss\Gauss.xcodeproj\xcuserdata\yingliu.xcuserdatad\xcschemes\._xcschememanagement.plist
........\.....\...............\..........\...................\._xcschemes
........\.....\...............\..........\._yingliu.xcuserdatad
........\.....\...............\._xcuserdata
........\.....\._Gauss.xcodeproj
........\._Gauss