Do not use static_cast when you cast from a basic class to a derived one. This may lead to undefined behavior. To handle the polymorphism, a virtual inheritance or a multiple inheritance case always use dynamic_cast instead.

The following short example shows the undefined behavior cases. This works with GCC, VC and online C++ shells:

Pros and cons

Why use Qt Test for unit testing and TDD (test-driven development)?

• small testing framework (about 6K lines of source code);
• seamless integration with QtCreator development environment;
• full support of Qt framework including classes/types and signal/slots;
• simple to start and use.

However, there are some drawbacks, too.

Q1. Difference between ++*p, *p++ and *++p

Priority to keep in mind:

The Windows registry (WR) is a NoSQL DBMS based on a semi-structured hierarchical data model. Unlike configuration files approach, WR:

In the case of linked circular list you need to add some checks to avoid memory corruption.

Full example (compiled OK with GCC 8.x)