File list (Check if you may need any files):
ObjectC2.0\.DS_Store
..........\cha4\.DS_Store
..........\....\exe4_10\.DS_Store
..........\....\.......\Calculator.h
..........\....\.......\Calculator.m
..........\....\.......\exe4_10.1
..........\....\.......\exe4_10.m
..........\....\.....2\.DS_Store
..........\....\......\exe4_2.1
..........\....\......\exe4_2.m
..........\....\.....6\.DS_Store
..........\....\......\Complex.h
..........\....\......\Complex.m
..........\....\......\exe4_6.1
..........\....\......\exe4_6.m
..........\...p10\.DS_Store
..........\......\app10_1\app10_1.1
..........\......\.......\app10_1.m
..........\......\.......\Fraction.h
..........\......\.......\Fraction.m
..........\.....1\.DS_Store
..........\......\app11_1\app11_1.1
..........\......\.......\app11_1.m
..........\......\.......\Fraction.h
..........\......\.......\Fraction.m
..........\......\.......\FractionOps.h
..........\......\.......\FractionOps.m
..........\.....5\.DS_Store
..........\......\app15_2\AddressCard.h
..........\......\.......\AddressCard.m
..........\......\.......\app15_2.1
..........\......\.......\app15_2.m
..........\......\..._15\app_15.1
..........\......\......\app_15.m
..........\....2\.DS_Store
..........\.....\exe2_3\exe2_3.m
..........\.....\.....4\exe2_4.m
..........\.....\.....5\exe2_5.m
..........\.....\prog1\.DS_Store
..........\.....\.....\main.c
..........\.....\.....\prog1.1
..........\.....\....2\prog2.1
..........\.....\.....\prog2.m
..........\.....0\.DS_Store
..........\......\chap20_1\build\chap20_1.build\chap20_1.pbxindex\categories.pbxbtree
..........\......\........\.....\..............\.................\cdecls.pbxbtree
..........\......\........\.....\..............\.................\decls.pbxbtree
..........\......\........\.....\..............\.................\files.pbxbtree
..........\......\........\.....\..............\.................\imports.pbxbtree
..........\......\........\.....\..............\.................\pbxindex.header
..........\......\........\.....\..............\.................\protocols.pbxbtree
..........\......\........\.....\..............\.................\refs.pbxbtree
..........\......\........\.....\..............\.................\strings.pbxstrings\control
..........\......\........\.....\..............\.................\..................\strings
..........\......\........\.....\..............\.................\subclasses.pbxbtree
..........\......\........\.....\..............\.................\symbols0.pbxsymbols
..........\......\........\.....\..............\Debug-iphonesimulator\chap20_1.build\build-state.dat
..........\......\........\.....\..............\.....................\..............\build-state~.dat
..........\......\........\.....\..............\.....................\..............\chap20_1-all-target-headers.hmap
..........\......\........\.....\..............\.....................\..............\chap20_1-generated-files.hmap
..........\......\........\.....\..............\.....................\..............\chap20_1-own-target-headers.hmap
..........\......\........\.....\..............\.....................\..............\chap20_1-project-headers.hmap
..........\......\........\.....\..............\.....................\..............\chap20_1.dep
..........\......\........\.....\..............\.....................\..............\chap20_1.hmap
..........\......\........\.....\..............\.....................\..............\chap20_1~.dep
..........\......\........\.....\..............\.....................\..............\Objects-normal\i386\chap20_1.LinkFileList
..........\......\........\.....\..............\.....................\..............\..............\....\chap20_1AppDelegate.o
..........\......\........\.....\..............\.....................\..............\..............\....\main.o
..........\......\........\.....\Debug-iphonesimulator\chap20_1.app\chap20_1
..........\......\........\.....\.....................\............\Info.plist
..........\......\........\.....\.....................\............\MainWindow.nib
..........\......\........\.....\......