The Unofficial C For Dummies Website

This page supports the C programming books written by Dan Gookin and published by John Wiley.

Recent Lessons

Putting strtol() to the Test: July 13, 2019 The strtol() function not only converts strings to integers, it helps you validate the input data.
Peculiarities of the strtol() Function: July 6, 2019 When converting a string to an integer, the strtol() function provides a few interesting options.
Exponentiation: June 29, 2019 I'm no math genius, which probably explains my newfound fascinations with the pow() function.
The Perils of strncpy(): June 22, 2019 Most string functions are careful to cap the text they manipulate with a null character. The strncpy() function is not so generous.
To Read a Chunk a Data: June 15, 2019 The fread() function can confuse you when you get the arguments wrong.

Lessons are posted each Saturday; see the blog for all the Lessons

This Month's Exercise

Write Your Own Integer Conversion: July 1, 2019 Sure, a function is available, but it's good C programming practice to try writing your own.

Exercises are posted on the first of the month; see the blog for all the Exercises

Current Titles

For support on my older C titles, including the C All-In-One reference and C For Dummies, click the links on the left side of the page.

Online Training

Online training is provided through Linkedin Learning, a subscription service. Click the links to see a preview of my courses and learn how to sign up.

C: Data Structures, Pointers, and File Systems	C Essential Training: 1 The Basics
Learning C	Code Clinic: C
Further Topics in C Programming

"For Dummies" is a trademark or registered trademark of John Wiley.
This site is the online companion to the various
C language For Dummies titles written by Dan Gookin,
published by John Wiley.