为什么是error C2065: 'string' : undeclared identifier

[gonghai78]

C++ PRIMER电子版上的源代码
在win2000+vc 6(英文班)下的编译错误，请教是什么原因？

#include <iostream.h>
#include <string.h>
int main()
{

string* word;
while ( cin>>word )

cout<<"word read is: "<<word;

cout<<"ok: no more words to read: bye!\n";
return 0;
}

[fierygnu]

using namespace std;

[bm1408]

打开命名空间！using namespace std;

[wowowowo]

#include <iostream.h>
#include <string.h>
改为
#include <iostream>
#include <string>
using namespace std;

[点燃你的火花]

同意楼上！

[bfsky]

wowowowo(1) 你的方法我试过了，还是有错啊。我的测试环境和楼主的一样，也是在win2000+vc 6(英文版)下的编译错误，请教是什么原因？


--------------------Configuration: 3_4 - Win32 Debug--------------------
Compiling...
3_4.cpp
e:\tst\3_4\3_4.cpp(9) : 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)
e:\tst\3_4\3_4.cpp(9) : fatal error C1903: unable to recover from previous error(s); stopping compilation
Error executing cl.exe.

3_4.obj - 2 error(s), 0 warning(s)