ambiguous reference

[Lucas Fiorini]

So, I'm making a Hash Table dividing the classes between different archives. Than, the problem is, even if I include the "hash.hpp" file into the main, it looks like it does not recingisse it.
The erros are:
main.cpp:7:5: error: reference to 'hash' is ambiguous
hash teste;
^
./hash.hpp:10:7: note: candidate found by name lookup is 'hash'
class hash{

#include <iostream>
#include "hash.hpp"
using namespace std;

int main (){
    
    hash test;
    
    test.insert(17);
    cout << test.search(17)<< endl;
    
    return 0;
}

[Peter87]

On line 8 the compiler doesn't know if you want your hash class or std::hash. This is one of the drawbacks of using namespace std;
Removing it would fixes the issue. Other possible solutions are to rename your hash class, or to write ::hash to let the compiler know that you want the hash defined in the global namespace.