Stuck on 'undefined reference '

This should be easy to fix but im in the dark.

LineCounter.h

Code:

---

#ifndef LINE_COUNTER_H
#define LINE_COUNTER_H

class LineCounter{
        private:
                char pC;
                char pNC;
                char C;
                char NC;
                static int CommentCount;
                static int LineCount;
                bool ReachedEndOFLine;
        public:
                void countLines();
                int getCommentCount();
                int getLineCount();
};

#endif

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LineCounter.cpp

Code:

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#include "LineCounter.h"

int CommentCount = 0;
int LineCount = 0;

void LineCounter::countLines(){
       
}

int LineCounter::getCommentCount(){ return CommentCount;}
int LineCounter::getLineCount(){ return LineCount;}

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Main.cpp

Code:

---

#include <iostream>
#include <fstream>  // file I/O
#include "LineCounter.h"

using namespace std;

int main(int argc, char *arg[]){
       
        if (argc < 1){
                cout << "Usage is 'sloc files[]'";
                return 0;
        }else{
                ifstream SourceFile(arg[1], ios::in);  // declare and open
        }
}

---

Compile command

Code:

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c++ LineCounter.cpp Main.cpp -o Program.exe

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Error:

Code:

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/tmp/cc0kkubh.o: In function `LineCounter::getCommentCount()':
LineCounter.cpp:(.text+0xa): undefined reference to `LineCounter::CommentCount'
/tmp/cc0kkubh.o: In function `LineCounter::getLineCount()':
LineCounter.cpp:(.text+0x14): undefined reference to `LineCounter::LineCount'

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> int CommentCount = 0;
> int LineCount = 0;
These need the class name in front of them as well.

Quote:

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Originally Posted by Salem

> int CommentCount = 0;
> int LineCount = 0;
These need the class name in front of them as well.

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Only for static variables. For non-static variables I would use the constructor to initialize them.