初学c++指教一下一个小程序

jin.liu

#include <iostream>;
  #include <string>;

  int main()
  {
        string word ;
        while ( cin >;>; word )
            cout << "word read is: " << word <<"\n";
        cout << "OK: no more other words ro read: bye!\n";
        return 0;
  }

就这么小的阿，竟然在Linux用g++编译不过去，郁闷。提示：
input.cpp: In function `int main()':
input.cpp:6: error: `String' undeclared (first use this function)
input.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
input.cpp:6: error: expected `;' before "word"
input.cpp:7: error: `cin' undeclared (first use this function)
input.cpp:7: error: `word' undeclared (first use this function)
input.cpp:8: error: `cout' undeclared (first use this function)

lenovo

#include <iostream>;
#include <string>;
using namespace std;
>;>;input.cpp:6: error: `String' undeclared (first use this function)
我没看到你代码里面有String。

jin.liu

哦，贴错了阿。我贴的是我该的一点编译的错误。这个错误是如下：
input.cpp: In function `int main()':
input.cpp:6: error: `string' undeclared (first use this function)
input.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
input.cpp:6: error: expected `;' before "word"
input.cpp:7: error: `cin' undeclared (first use this function)
input.cpp:7: error: `word' undeclared (first use this function)
input.cpp:8: error: `cout' undeclared (first use this function)

先谢了阿。

hmxxyy

缺了using namespace std;

jin.liu

[quote]原帖由 "hmxxyy"]缺了using namespace std;[/quote 发表：

Thx.It's OK now.
It's always necessary to wirte "using namespace XX "??

hmxxyy

string 和 cin都属于std namespace
About the concept of namespce, please refer to the books.

It can not explained with serveral words here.

jin.liu

Thank you very much!
I am now read Thinking in c++ 2th edition .Hope I can know more about c++.

tntlei

两个中国人为什么要用外语，想不通。。。其中一个还自称狭隘的民族主义者。

青椒不辣

[quote]原帖由 "tntlei"]两个中国人为什么要用外语，想不通。。。其中一个还自称狭隘的民族主义者。[/quote 发表：

呵呵呵

jin.liu

[quote]原帖由 "tntlei"]两个中国人为什么要用外语，想不通。。。其中一个还自称狭隘的民族主义者。[/quote 发表：

所谓的“狭隘”是针对某些人来数，对我来说，就是对小日本。
别这样的"无知"了 ，中国人为什么不可以英文呢？？？