To write a function, can be the longest word in a string to find. Write a program that functions from the keyboard to input a line of characters, and can call the longest word I have written to find the function, the output word.

5\5\5.cpp
.\.\5.vcproj
.\.\5.vcproj.tianning-PC.tianning.user
.\.\Debug\5.exe.embed.manifest
.\.\.....\5.exe.embed.manifest.res
.\.\.....\5.exe.intermediate.manifest
.\.\.....\5.obj
.\.\.....\BuildLog.htm
.\.\.....\mt.dep
.\.\.....\vc80.idb
.\.\.....\vc80.pdb
.\5.ncb
.\5.sln
.\5.suo
.\debug\5.exe
.\.....\5.ilk
.\.....\5.pdb
.\5\Debug
.\5
.\debug
5

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