#include 和 #include

#include <cstring>
...
string theString="Hello";
cout<<string<<endl;

MSVC6.0 reports:

error C2679: binary '<<' : no operator defined which takes a right-hand operand of type 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >' (or there is no acceptable conversion)

BUT

#include <string>
string theString="Hello";
cout<<string<<endl;

is OK under MSVC6.0