Building JSONs using the POCO C++ library

POCO refers to a very handy set of libraries for C++. They are cleanly written, STL-like, easy to use and most importantly, free (Boost License). I've had a small encounter with these libraries, mainly the JSON module and I'll detail, in this article, on how to build a JSON and then how to parse a JSON object manually using POCO::JSON.

Using boost.property_tree.ptree to store JSON data

A Property Tree in Boost is a data structure that can store information in a tree-like format. Each node having a key and a value. It can be used to store XML, INI, INFO and JSON formats. Maybe also other, but these are the most popular and they are supported by boost, with ready-to-use parsers.
The limitation for JSON handling, is that property trees do not support simple arrays, since all nodes are of key-value type.