Problem with header file method

[Beowolf]

Hey, I am getting these compiler errors:

15 bst.h variable or field `processInput' declared void 
15 bst.h expected `;' before '(' token 
14 bst.cpp no `void BST::processInput(std::ifstream&)' member function declared in class `BST'

My code is:

bst.h

#include <string>
#include <fstream>

#ifndef BST_H
#define BST_H

class BST
{
    public:
        //BST(void);
        void processInput(ifstream & inSource);

};

#endif

bst.cpp

#include <cstdlib>
#include <iostream>
#include <fstream>
#include <string>
#include "bst.h"

using namespace std;

void BST::processInput(ifstream & inSource)
{
    string line;

    while(getline(inSource, line) != NULL)
        cout << line << "\n";
}

And the method is called by:

// error checking removed for length
fileName = argv[1];

    fileStream.open(fileName);

    myBST.processInput(fileStream);

Any help with the error?

[dwks]

Use std::ifstream in bst.h, or using namespace std.