文件名称:friend_example
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失败请重下，重下不扣分。
介绍说明－－下载内容均来自于网络，请自行研究使用
四个小程序教你学会C++中的“友元”：运算符重载为友元，友元函数，友元类，类成员函数互为友元。
运行环境： VS2008-Four small programs teach you: how to use "friend" in C++.
运行环境： VS2008-Four small programs teach you: how to use "friend" in C++.
(系统自动生成,下载前可以参看下载内容)
下载文件列表
friend_example\Debug\exam2.exe
..............\.....\exam2.ilk
..............\.....\exam2.pdb
..............\.....\exam3.exe
..............\.....\exam3.ilk
..............\.....\exam3.pdb
..............\.....\exam4.exe
..............\.....\exam4.ilk
..............\.....\exam4.pdb
..............\.....\friend_example.exe
..............\.....\friend_example.ilk
..............\.....\friend_example.pdb
..............\exam2\Debug\BuildLog.htm
..............\.....\.....\exam2.exe.embed.manifest
..............\.....\.....\exam2.exe.embed.manifest.res
..............\.....\.....\exam2.exe.intermediate.manifest
..............\.....\.....\exam2.obj
..............\.....\.....\mt.dep
..............\.....\.....\vc90.idb
..............\.....\.....\vc90.pdb
..............\.....\exam2.cpp
..............\.....\exam2.vcproj
..............\.....\exam2.vcproj.XP-201109232309.Administrator.user
..............\....3\Debug\BuildLog.htm
..............\.....\.....\exam3.exe.embed.manifest
..............\.....\.....\exam3.exe.embed.manifest.res
..............\.....\.....\exam3.exe.intermediate.manifest
..............\.....\.....\exam3.obj
..............\.....\.....\mt.dep
..............\.....\.....\vc90.idb
..............\.....\.....\vc90.pdb
..............\.....\exam3.cpp
..............\.....\exam3.vcproj
..............\.....\exam3.vcproj.XP-201109232309.Administrator.user
..............\....4\Debug\BuildLog.htm
..............\.....\.....\exam4.exe.embed.manifest
..............\.....\.....\exam4.exe.embed.manifest.res
..............\.....\.....\exam4.exe.intermediate.manifest
..............\.....\.....\exam4.obj
..............\.....\.....\mt.dep
..............\.....\.....\vc90.idb
..............\.....\.....\vc90.pdb
..............\.....\exam4.cpp
..............\.....\exam4.vcproj
..............\.....\exam4.vcproj.XP-201109232309.Administrator.user
..............\friend_example\Debug\BuildLog.htm
..............\..............\.....\friend_example.exe.embed.manifest
..............\..............\.....\friend_example.exe.embed.manifest.res
..............\..............\.....\friend_example.exe.intermediate.manifest
..............\..............\.....\friend_example.obj
..............\..............\.....\mt.dep
..............\..............\.....\vc90.idb
..............\..............\.....\vc90.pdb
..............\..............\friend_example.cpp
..............\..............\friend_example.vcproj
..............\..............\friend_example.vcproj.XP-201109232309.Administrator.user
..............\friend_example.ncb
..............\friend_example.sln
..............\friend_example.suo
..............\exam2\Debug
..............\....3\Debug
..............\....4\Debug
..............\friend_example\Debug
..............\Debug
..............\exam2
..............\exam3
..............\exam4
..............\friend_example
friend_example
..............\.....\exam2.ilk
..............\.....\exam2.pdb
..............\.....\exam3.exe
..............\.....\exam3.ilk
..............\.....\exam3.pdb
..............\.....\exam4.exe
..............\.....\exam4.ilk
..............\.....\exam4.pdb
..............\.....\friend_example.exe
..............\.....\friend_example.ilk
..............\.....\friend_example.pdb
..............\exam2\Debug\BuildLog.htm
..............\.....\.....\exam2.exe.embed.manifest
..............\.....\.....\exam2.exe.embed.manifest.res
..............\.....\.....\exam2.exe.intermediate.manifest
..............\.....\.....\exam2.obj
..............\.....\.....\mt.dep
..............\.....\.....\vc90.idb
..............\.....\.....\vc90.pdb
..............\.....\exam2.cpp
..............\.....\exam2.vcproj
..............\.....\exam2.vcproj.XP-201109232309.Administrator.user
..............\....3\Debug\BuildLog.htm
..............\.....\.....\exam3.exe.embed.manifest
..............\.....\.....\exam3.exe.embed.manifest.res
..............\.....\.....\exam3.exe.intermediate.manifest
..............\.....\.....\exam3.obj
..............\.....\.....\mt.dep
..............\.....\.....\vc90.idb
..............\.....\.....\vc90.pdb
..............\.....\exam3.cpp
..............\.....\exam3.vcproj
..............\.....\exam3.vcproj.XP-201109232309.Administrator.user
..............\....4\Debug\BuildLog.htm
..............\.....\.....\exam4.exe.embed.manifest
..............\.....\.....\exam4.exe.embed.manifest.res
..............\.....\.....\exam4.exe.intermediate.manifest
..............\.....\.....\exam4.obj
..............\.....\.....\mt.dep
..............\.....\.....\vc90.idb
..............\.....\.....\vc90.pdb
..............\.....\exam4.cpp
..............\.....\exam4.vcproj
..............\.....\exam4.vcproj.XP-201109232309.Administrator.user
..............\friend_example\Debug\BuildLog.htm
..............\..............\.....\friend_example.exe.embed.manifest
..............\..............\.....\friend_example.exe.embed.manifest.res
..............\..............\.....\friend_example.exe.intermediate.manifest
..............\..............\.....\friend_example.obj
..............\..............\.....\mt.dep
..............\..............\.....\vc90.idb
..............\..............\.....\vc90.pdb
..............\..............\friend_example.cpp
..............\..............\friend_example.vcproj
..............\..............\friend_example.vcproj.XP-201109232309.Administrator.user
..............\friend_example.ncb
..............\friend_example.sln
..............\friend_example.suo
..............\exam2\Debug
..............\....3\Debug
..............\....4\Debug
..............\friend_example\Debug
..............\Debug
..............\exam2
..............\exam3
..............\exam4
..............\friend_example
friend_example