C++ for Lazy Programmers: Quick, Easy, and Fun C++ for Beginners

© Will Briggs 2019

W. BriggsC++ for Lazy Programmershttps://doi.org/10.1007/978-1-4842-5187-4_9

9. Using the Debugger

Will Briggs¹ 

(1)

Lynchburg, VA, USA

 

The debugger lets you step through the program, line by line or function by function, seeing the values of variables so you can tell what goes wrong. Good idea, right?

I think so.

A flawed program

To cover useful debugger commands, let’s use the debugger to repair the flawed program in Example 9-1. It’s intended to draw a US flag: a sort of a groovy, hand-made looking version with hollow stars as in the picture. (To do a better job, we’d use an image from a file – but for now I want to use, and debug, ...