Embedded Programming with Modern C++ Cookbook

How to do it...

We are going to create a simple program with three implementations of a function called Receive. All three implementations have identical behavior but a different interface. Follow these steps:

1. In your working directory, that is, ~/test, create a subdirectory called errcode.
2. Use your favorite text editor to create a file called errcode.cpp in the errcode subdirectory.
3. Add the implementation of the first function to the errcode.cpp file:

#include <iostream>  int Receive(int input, std::string& output) {  if (input < 0) {    return -1;  }  output = "Hello";  return 0;}

4. Next, we add the second implementation:

std::string Receive(int input, int& error) {  if (input < 0) {    error = -1;    return "";  }  error = 0;  return "Hello";}

5. The third ...