identifier not found

[technologist]

Hi,

trying to split a function between a .cpp/.h and accessing it in main by calling that function. I keep getting the same error "identifier not found" though I can't figure out why and need some fresh eyes to look at this:

main.cpp

int main()
{
int x = 0;
passaval(x);
std::cout << "Value passed is:"<< passaval<< std::endl;
}

.cpp:

#include "passaval.h"

void passaval(int &x)
{
      x = 99;
}

.h:

#ifndef PASSAVAL_H    
#define PASSAVAL_H
void passaval(int x);
#endif 

 was expecting a 99

error above
Thx in advance

[AbstractionAnon]

One obvious problem is that in your .cpp file, you're passing x by reference. In your .h file, you're saying x is passed by value. They must agree.

[jlb]

You also don't have a variable named passaval defined in main(), passaval() is a function returning void not a variable to be printed.

[doug4]

Also, you need to include passaval.h in main.cpp.

[technologist]

Adjusted. Thank you.

main.cpp

#include "pch.h"
#include <iostream>
#include "passaval.h"

int main()
{
    std::cout << "Hello World!\n";
	int x;
	passaval(x);
	std::cout << x << std::endl;
	
}

.cpp:

#include "pch.h"
#include "passaval.h"

void passaval(int &x)
{
	
	x = 99;

}

.h:

#pragma once
#ifndef PASSAVAL_H    
#define PASSAVAL_H

void passaval(int &x);

#endif  

Hello World!
99