#ifndef TEXTFILE_H
#    define TEXTFILE_H

#include <string>

class TextBuffer {
    protected:
        std::string lastFile;
        std::string buffer;
        int charCnt;
        int wordCnt;
        
    public:
        TextBuffer();
        TextBuffer(std::string);
        
        std::string getLastFile() const { return lastFile; }        
        std::string getBuffer() const { return buffer; }
        int getCharCnt() const { return charCnt; }
        int getWordCnt() const { return wordCnt; }

        void setBuffer(std::string toSet, bool willAppend);
        
        bool OpenFile(std::string in_filename, bool willAppend);
        void SaveFile(std::string in_filename);
};

#endif

#include "TextBuffer.h"
#include <fstream>

TextBuffer::TextBuffer(): 
    buffer(""),
    lastFile(""),
    charCnt(0),
    wordCnt(0) {                  
}

TextBuffer::TextBuffer(std::string in_lastFile): 
    buffer(""),                                         
    lastFile(in_lastFile),
    charCnt(0),
    wordCnt(0) {
}
... other functions not added...

#include "TextBuffer.h"

#include <iostream>

using namespace std;

int main() {
    TextBuffer myTextBuffer();
    rotatedOne.OpenFile("../../two.txt", false);
    cout << rotatedOne.getBuffer();
    cout << "\n\nchars" << rotatedOne.getCharCnt() << endl << endl;
    system("pause");
}

../test.cpp: In function `int main()':
../test.cpp:9: request for member `OpenFile' in `myTextBuffer()', which is of 
   non-aggregate type `TextBuffer ()()'
../test.cpp:10: request for member `getBuffer' in `myTextBuffer()', which is of 
   non-aggregate type `TextBuffer ()()'
../test.cpp:11: request for member `getCharCnt' in `myTextBuffer()', which is 
   of non-aggregate type `TextBuffer ()()'

int main() {
-    TextBuffer myTextBuffer();
+    TextBuffer myTextBuffer;
}