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

LineCounter.cpp

Code:

#include "LineCounter.h"

int CommentCount = 0;
int LineCount = 0;

void LineCounter::countLines(){
	
}

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

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:

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

Error:

Code:

/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'

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

Originally Posted by Salem

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

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