RH9.0下的 C++ 编译不过去是怎么回事?

hoby

[root@fire root]# g++ hello.cpp
hello.cpp:1: `iostream' was not declared in this scope
hello.cpp:2: syntax error before `using'
hello.cpp: In function `int main()':
hello.cpp:5: `cout' undeclared in namespace `std'
hello.cpp:5: `endl' undeclared in namespace `std'
[root@fire root]#

我的错误信息。我用的是RH9.0

libinary

1. 
   
2. #include <iostream>
   
3. 
   
4. using namespace std;
   
5. 
   
6. int
   
7. main(void)
   
8. {
   
9.   cout << "hello, world!" << endl;
   
10.   return 0;
    
11. }

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