cout << "请输入要点名的班级：" << endl;
cin >> fileName; 

file.open("fileName.txt",ios::in);

问题是：如何把两个fileName关联起来...我编译时貌似只是默认打开fileName这个文件名的文件而已..
PS：我承认我菜鸟..

[ 本帖最后由 ylxdjl 于 2010-9-5 19:34 编辑 ]

楼上..  这样改真的可以吗？？

--------------------Configuration: wenjianliudu - Win32 Debug--------------------
Compiling...
wenjianliudu.cpp
C:\Users\HP\Desktop\C++\wenjianliudu\wenjianliudu.cpp(47) : error C2664: 'void __thiscall std::basic_ifstream<char,struct std::char_traits<char> >::open(const char *,int)' : cannot convert parameter 1 from 'class std::basic_string<char,struct std::c
har_traits<char>,class std::allocator<char> >' to 'const char *'
        No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
Error executing cl.exe.

wenjianliudu.exe - 1 error(s), 0 warning(s)


改了后是这个...