Write a program, enter the number of student names, English, computers, and Chinese achievements, and find the average. (Hint: to design a performance management in English classes English, a computer class performance management performance management Computer and a Chinese class Chinese, the other students to design a class derived from the first three classes.)

200\200.cpp
...\200.def
...\200.dsp
...\200.dsw
...\200.h
...\200.idl
...\200.ncb
...\200.opt
...\200.plg
...\200.rc
...\200.tlb
...\200ps.def
...\200ps.mk
...\200_i.c
...\8.cpp
...\8.dsp
...\8.dsw
...\8.ncb
...\8.opt
...\8.plg
...\Debug\200.obj
...\.....\200.pch
...\.....\200.res
...\.....\8.exe
...\.....\8.ilk
...\.....\8.obj
...\.....\8.pch
...\.....\8.pdb
...\.....\StdAfx.obj
...\.....\vc60.idb
...\.....\vc60.pdb
...\Resource.h
...\StdAfx.cpp
...\StdAfx.h
...\Debug
200

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