Trying to implement a function C++ - c++

Question

I started learning C++ a few weeks ago. Now I'm trying to program a kind of shop as a challenge. I've made it 2 or 3 times before, but always in one program. This time I tried to put some functions I wrote in it, so the main file wouldn't be that messed up again.
The problem I'm having is, when I'm trying to import a function, I get this error message:
E0413 There is no suitable conversion function from 'std::basic_ostream<char, std::char_traits<char>>' to 'int'.
Here's the code:
Mainfile:
#include <iostream>
#include "Benutzer.h"
using namespace std;
int main()
{
user;
}
Function:
#include <iostream>
using namespace std;
int user
{
cout << "So you're a user. What do you want to buy?"
}
I know it's not much code by now, but I was already testing.

Answer 1

As I can see, your program has an error in syntax.
Two things you need to consider here:
How to define a function:
return_type func_name(data_type args){
/// function body
}
How to call a function:
func_name(args);
I verified your code with little change on my system.
This is correct code:
main_file.cpp
#include <iostream>
#include "Benutzer.h"
using namespace std;
int main()
{
user();
}
Benutzer.h
#include <iostream>
using namespace std;
int user()
{
cout << "So you're a user. What do you want to buy?";
return 0;
}
This works.