Structured Programming

[mainframe639]

I've tried to run this code but my compiler said "undefined reference to addition(int, int)

This is the first time I tried to run a program from different cpp files.

In add.h

#include <iostream>
using namespace std;

int addition(int a, int b);

In main.cpp

#include "add.h"

int main ()
{
  int z;
  z = addition (5,3);
  cout << "The result is " << z;
  return 0;
}

In addition.cpp

#include "add.h"

int addition (int a, int b)
{
  int r;
  r=a+b;
  return (r);
}

That code is from Juan Soulie. It runs properly using functions(in one cpp file)
but not in structured programming.\
What is the problem?

[empress]

You also include addition.cpp in main.cpp
and no need of writing #include"add.h" in addition.cpp
that should work

[Bazzy]

@mainframe639
You need to compile both source files and link them in the final executable.

@empress
Never #include source files.

[mainframe639]

@ Bazzy: how can I link them?

[Bazzy]

How are you compiling?
If you have an IDE it should do everything for you.
If you are using g++ you simply pass both sources and it will compile and link them
eg: g++ main.cpp addition.cpp -o yourprogram