C language without windows api Copy more than a 50M file, every copy 1kb the end of an unsigned char buffer [1024] until the file copy

example\Debug\example.exe
.......\.....\example.ilk
.......\.....\example.pdb
.......\.....\example2.exe
.......\.....\example2.ilk
.......\.....\example2.pdb
.......\.....\iii.exe
.......\.....\iii.ilk
.......\.....\iii.pdb
.......\example\chengfa.txt
.......\.......\Debug\BuildLog.htm
.......\.......\.....\cf.obj
.......\.......\.....\example.exe.embed.manifest
.......\.......\.....\example.exe.embed.manifest.res
.......\.......\.....\example.exe.intermediate.manifest
.......\.......\.....\example1.obj
.......\.......\.....\mt.dep
.......\.......\.....\vc90.idb
.......\.......\.....\vc90.pdb
.......\.......\.....\yyy.obj
.......\.......\example.vcproj
.......\.......\example.vcproj.MICROSOF-DAA671.Administrator.user
.......\.......\example1.cpp
.......\example.sln
.......\example.suo
.......\.......2\1.bmp
.......\........\1.txt
.......\........\2.bmp
.......\........\2.txt
.......\........\Debug\BuildLog.htm
.......\........\.....\example2.exe.embed.manifest
.......\........\.....\example2.exe.embed.manifest.res
.......\........\.....\example2.exe.intermediate.manifest
.......\........\.....\example2.obj
.......\........\.....\mt.dep
.......\........\.....\vc90.idb
.......\........\.....\vc90.pdb
.......\........\example2.cpp
.......\........\example2.vcproj
.......\........\example2.vcproj.MICROSOF-DAA671.Administrator.user
.......\........\file1
.......\........\file2
.......\.......\Debug
.......\.......2\Debug
.......\Debug
.......\example
.......\example2
example
.......\example.ncb

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