# Capítulo 12. Finding Errors

# 12.1. Debugging Macros provided by Qt

The Debugging Macros provided by the Qt library can be read on the debug.html page of your Qt Online Reference Documentation, acessable on the link "Debugging Techniques" at the Qt Documentation index page.

The most recently used macros are

- ASSERT(b)

- CHECK&_;PTR(p)

Thereby, b is a boolean expression. Gives out a debugging warning if b is false; p is a pointer which is checked and gives out a warning, if p is null.

Details can be found in the Qt Online Reference.