Member function undefined in separate file

[MarkyMark]

I have three files.

//headerfile NumArrSpecs.h

#ifndef NUMARR_H
#define NUMARR_H

class NumArr
{
private:
	double *arrptr;

public:
	NumArr(int nums)
	{
		arrptr = new double [nums];
	}

	void storeElems(int, double);
};

#endif 

File 2:

//file to define member functions
#include "NumArrSpecs.h"

void NumArr::storeElems(int e, double v)
{
	arrptr[e] = v;
}

file 3:

#include "NumArrSpecs.h"
#include <iostream>

int main()
{
	NumArr test(5);

	double userVal = 0.0;
	for(int count = 0; count < 5; count++)
	{
		storeElems(count, userVal);
	
	}
}

My problem is that the storeElems member function is causing an error saying it is undefined, however there are no errors any where else in the program being reported. I have made several programs involving classes now, all with this three file format and this is the first time that a member function in the main file is being reported as undefined, so I'm not sure what to do. thanks for the help

[TarikNeaj]

Your class is called class NumArr. So why is this - #include "NumArrSpecs.h" in the other 2 files? There is nothing called NumArrSpecs. You want to

#include "NumArr.h"

[MarkyMark]

Actually I realized I forget to include the calling object so it should be:
test.storeElems(count, userVal);