简单的程序，编译不过，怎么改正啊？

cppfans6

1. #include   <iostream>
   
2. #include   <typeinfo>
   
3. 
   
4. using   namespace   std;
   
5. 
   
6. template   <typename   TP>
   
7. struct   COne   
   
8. {   
   
9.     typedef   TP   one_value_type;
   
10. };
    
11. 
    
12. template   <typename   COne>
    
13. struct   CTwo   
    
14. {
    
15.         typedef   typename   COne<TP>::one_value_type     two_value_type;   
    
16. };
    
17. 
    
18. 
    
19. int   main()
    
20. {
    
21.         typedef COne <int>   OneInt_type;
    
22.         typedef CTwo <OneInt_type>   TwoInt_type;
    
23.         TwoInt_type::two_value_type   i;
    
24.         int   j;
    
25.         if   (typeid(i) == typeid(j))      
    
26.                 cout << "Right! " <<endl;
    
27.         return;
    
28. }
    

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编译提示错误：

Compiling...
test1.cpp
E:\LAB\stl\test1\test1.cpp(15) : error C2059: syntax error : '<'
        E:\LAB\stl\test1\test1.cpp(16) : see reference to class template instantiation 'CTwo<COne>' being compiled
E:\LAB\stl\test1\test1.cpp(15) : error C2039: 'one_value_type' : is not a member of '`global namespace''
        E:\LAB\stl\test1\test1.cpp(16) : see reference to class template instantiation 'CTwo<COne>' being compiled
E:\LAB\stl\test1\test1.cpp(15) : error C2238: unexpected token(s) preceding ';'
        E:\LAB\stl\test1\test1.cpp(16) : see reference to class template instantiation 'CTwo<COne>' being compiled
E:\LAB\stl\test1\test1.cpp(15) : error C2059: syntax error : '<'
        E:\LAB\stl\test1\test1.cpp(23) : see reference to class template instantiation 'CTwo<struct COne<int> >' being compiled
E:\LAB\stl\test1\test1.cpp(15) : error C2039: 'one_value_type' : is not a member of '`global namespace''
        E:\LAB\stl\test1\test1.cpp(23) : see reference to class template instantiation 'CTwo<struct COne<int> >' being compiled
E:\LAB\stl\test1\test1.cpp(15) : error C2238: unexpected token(s) preceding ';'
        E:\LAB\stl\test1\test1.cpp(23) : see reference to class template instantiation 'CTwo<struct COne<int> >' being compiled
E:\LAB\stl\test1\test1.cpp(23) : error C2039: 'two_value_type' : is not a member of 'CTwo<struct COne<int> >'
E:\LAB\stl\test1\test1.cpp(23) : error C2065: 'two_value_type' : undeclared identifier
E:\LAB\stl\test1\test1.cpp(23) : error C2146: syntax error : missing ';' before identifier 'i'
E:\LAB\stl\test1\test1.cpp(23) : error C2065: 'i' : undeclared identifier
E:\LAB\stl\test1\test1.cpp(27) : warning C4508: 'main' : function should return a value; 'void' return type assumed
Error executing cl.exe.

test1.exe - 10 error(s), 1 warning(s)

linux_c_py_php

CTwo画蛇添足了.

1. #include <iostream>
   
2. #include <typeinfo>
   
3. 
   
4. using namespace std;
   
5. 
   
6. template < typename TP >
   
7. struct COne {
   
8.         typedef TP one_value_type;
   
9. };
   
10. 
    
11. template < typename TP>
    
12. struct CTwo {
    
13.         typedef typename TP::one_value_type two_value_type;
    
14. };
    
15. 
    
16. int main()
    
17. {
    
18.         typedef COne < int >OneInt_type;
    
19.         typedef CTwo < OneInt_type > TwoInt_type;
    
20.         TwoInt_type::two_value_type i;
    
21.         int j;
    
22.         if (typeid(i) == typeid(j))
    
23.                 cout << "Right! " << endl;
    
24.         return 0;
    
25. }

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