langranian method which writter in C++ language, for students who need it
File list:
lagrange_console
...............\Debug
...............\.....\lagrange_console.exe
...............\.....\lagrange_console.ilk
...............\.....\lagrange_console.pdb
...............\ipch
...............\....\lagrange_console-7fbf30c0
...............\....\.........................\lagrange_console-9cdb1d5f.ipch
...............\lagrange_console
...............\................\Debug
...............\................\.....\cl.command.1.tlog
...............\................\.....\CL.read.1.tlog
...............\................\.....\CL.write.1.tlog
...............\................\.....\lagrange_console.exe.intermediate.manifest
...............\................\.....\lagrange_console.lastbuildstate
...............\................\.....\lagrange_console.log
...............\................\.....\link.command.1.tlog
...............\................\.....\link.read.1.tlog
...............\................\.....\link.write.1.tlog
...............\................\.....\main.obj
...............\................\.....\mt.command.1.tlog
...............\................\.....\mt.read.1.tlog
...............\................\.....\mt.write.1.tlog
...............\................\.....\vc100.idb
...............\................\.....\vc100.pdb
...............\................\lagrange_console.vcxproj
...............\................\lagrange_console.vcxproj.filters
...............\................\lagrange_console.vcxproj.user
...............\................\main.cpp
...............\lagrange_console.sdf
...............\lagrange_console.sln
...............\lagrange_console.suo