Multiple definition of error

[Abhi589]

This might be really stupid but I am just starting.
Was trying multiple files.

Here is the code:

Menu.cpp

#include<iostream>
#include "Guess the no.cpp"
using namespace std;

int main()
{
    int game;
    cout<<"Welcome to games"<<endl<<endl;
    cout<<"Choose the game you want to play"<<endl<<"1. Guess the no"<<endl<<"2. Race";
    cin>>game;

    switch(game)
    {
    case 1:
        GuessNo();
        break;
    case 2:
        cout<<"Under development";
        break;
    default:
        cout<<"Invalid game";
    }
}

Guess the no.cpp

#include<iostream>

using namespace std;

void GuessNo()
{
    cout<<"Almost ready";
}

Compiling gives the error multiple definition of Guess No()

What's the mistake?

[Chervil]

Don't #include .cpp files.
Instead make a header file which would contain just the function prototype declaration, void GuessNo(); and include that header file instead.

[Abhi589]

That helps, thanks chervil!