STinC++ rewrites the programs in Software Tools in Pascal using C++
I’ve reached the end of the chapter 1 and have written five programs:
For Kernighan and Plauger, each program has been progressively more complex than the last - a simple loop, then a variable, a conditional, then multiple conditions, and several types of loop. They have, through the course of their five programs, managed to show off all the fundamental features of Pascal. In contrast, I have done no such thing in my efforts with C++.
Thanks to the functions provided in the C++ standard library, I have little increase in code complexity for the first four programs. I might have had to get hold of some slightly bigger concepts - iterators, input and output as sequences you can iterate over - but once those are familiar, my
wordcount is no more complicated than where I started with
Things did get slightly hairier for
detab but not particularly so. There’s a little bit to grapple with around function objects, but nothing too strenuous. That I still haven’t written an explicit loop in C++ helps with understanding the code by eliminating what is essentially boilerplate.
It’s been fun! I’ve learned some new things already - about the tooling I’m using, and also about the C++ library itself. The idea of using
std::transform to massage a sequence of characters into a sequence of strings is, in retrospect, obvious but I hadn’t thought of doing anything like that before.
While I’ve hardly mentioned it, all the code has been written in test-first fashion. At this early stage in my progress through the book, I’m pretty much only dealing with a single function, the boundary cases are obvious, plus, in most cases, I’ve barely written any code. Nonetheless, I’d feel a bit icky just diving straight in and, even with code this straightforward, I have found and prevented bugs that might otherwise have eluded me.
On to chapter two!