No Type Specified Error

[Ganon11]

When I try and compile my code, I'm getting the error:

In file included from HTTest.cpp:2:
HashTable.h:52: error: ISO C++ forbids declaration of `vector' with no type

Line 52 from my program is:

        vector<list<int> > theLists;

As you can see, it clearly has a type. So does list.

I think the problem lies in the fact that it can't find the vector or list header files (or maybe just the list header file). Here's my trimmed up code:

#ifndef HASH_TABLE
#define HASH_TABLE
 
#include <vector>
#include <list>
#include <algorithm>
 
class HashTable {
    public:
        explicit HashTable(int size = 101);
 
        bool contains(int x) const;
 
        void makeEmpty();
 
        bool insert(int x);
 
        bool remove(int x);
 
        int avgLoad();
 
    private:
        vector<list<int> > theLists; // This is line 52 in my 'real code'.
        int currentSize;
 
        int myhash(int x) const;
};
 
 
#endif
 

Any ideas?

Thanks a lot guys!

[oler1s]

Everything is in namespace std. So it's std::vector and std::list, and so on.

Resist the temptation to drop a using namespace std; right after your includes. The using directive easily pollutes, but doing so in header files is downright disastrous.

[Ganon11]

I can't believe I forgot that! Thanks a lot, it fixed it.