Why does the compiler not see the class method?

Question

C++ / C#

The add_element_from_console() method is described in the ChymTable.h header file and implemented in ChymTable.cpp. When I try to use this method in the body of the program, the compiler throws an error "the ChymTable class does not contain a member add_element_from_console()". What could be the problem?
Here is the ChymTable.h file:

#ifndef ChymTable_H
#define ChymTable_H
#include "Element.h"
#include <string>
#include <fstream>

class ChymTable {
  private:
    int max_num_elements;
    int num_elements;
    Element *element;
  public:
    ChymTable(unsigned int max_el);
    ~ChymTable();

    void add_element(Element aelement);
    void add_element_from_console();
    void read_from_file(string filename);
    void write_to_file(string filename);
    void display_all();
    void find_element_by_mass(float amass);
    void find_metalls();
};
#endif

Here is the ChymTable.cpp file:

#include "ChymTable.h"
#include <iostream>
#include "stdafx.h"
//...реализация других ф-ций
void ChymTable::add_element_from_console() {
  element[num_elements].read_from_console();
  num_elements++;
}
//...реализация других ф-ций

Here is the Lab_4.cpp file:

#include <string>
#include <locale>
#include <Windows.h>
#include "stdafx.h"
#include "Element.h"
#include "Element.cpp"
#include "ChymTable.h"
#include "ChymTable.cpp"
#include <fstream>
#include <iostream>

using namespace std;

int main(){
//код
  table.add_element_from_console(); //здесь возникает ошибка (компилятор не видит метод)
//остальной код
}

Answer 1

you are connecting the files incorrectly
so it is unnecessary to do so.
#include "ChymTable.h"
#include "ChymTable.cpp"
you should only include headers (if they come with cpp)
write rules for make or just list all *.cpp for compiler

Answer 2

Try to rebuild the project (Rebuild solution)