为什么我这样写vector<string> vec的时候，运行的时会有四个警告？
为什么我这样写vector<string> vec的时候，运行的时会有四个警告？
这些警告分别为：

1.warning C4786: 'std::reverse_iterator<std::basic_string<char,std::char_traits<char>,std::allocator<char> > const *,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string
<char,std::char_traits<char>,std::allocator<char> > const &,std::basic_string<char,std::char_traits<char>,std::allocator<char> > const *,int>' : identifier was truncated to '255' characters in the debug information

2.warning C4786: 'std::reverse_iterator<std::basic_string<char,std::char_traits<char>,std::allocator<char> > *,std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::basic_string<char,
std::char_traits<char>,std::allocator<char> > &,std::basic_string<char,std::char_traits<char>,std::allocator<char> > *,int>' : identifier was truncated to '255' characters in the debug information

3. warning C4786: 'std::vector<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::allocator<std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >::vector<std::basic_
string<char,std::char_traits<char>,std::allocator<char> >,std::allocator<std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >' : identifier was truncated to '255' characters in the debug information

4.warning C4786: 'std::vector<std::basic_string<char,std::char_traits<char>,std::allocator<char> >,std::allocator<std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >::~vector<std::basic
_string<char,std::char_traits<char>,std::allocator<char> >,std::allocator<std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >' : identifier was truncated to '255' characters in the debug information

但是我这么写vector<char> vec的时候就不会有这样的警告，难道这么定义vector<string>不对吗？

[解决办法]
并不是错误，只是 Visual C++ 6 太陈旧了，无法在debug信息中保存超过256字节的变量名

在头文件中加上一行

#pragma warning(disable: 4786)

就可以关掉这些警告。
[解决办法]
珍惜生命，远离VC6
[解决办法]
from msdn
VC6的调试器不能处理长于255个字符的标识符。
STL往往会自己产生一些长于255字符的标识符，所以会产生警告。
如果要把这个警告禁用可以在程序开始处加上
#pragma warning(disable:4786)
你的标识符确实只有3个字符，但string和vector这两个STL模版会产生很长的标识符！
[解决办法]
珍惜生命，远离VC6.