Exercises, examples and other material relating to training module C239. This topic is presented on public courses Learning to program in C and C++, C++ for C Programmers, C and C++ Programming, Learning to program in C and C++, C and C++ Programming

In this section we'll show you several complete but small applications in C and C++ that put together all the various facilities we've covered so that you can see how they all interact in real life. One of the big uses that's made of C and C++ in some organisations these days is in adding specialist facilities to PHP, Perl, Tcl and Python and this module also provides a brief introduction to how this is achieved.What makes a good variable name?

Articles and tips on this subject		updated
4559	When do I use the this keyword in C++? Question: When do I use the this keyword in C++? Answer: When I expliciy need (or want) to refer to a member variable or object within the current object. Example:    class Transport{       public:          Transport(int);          int ...	2015-10-29
4374	Test driven development, and class design, from first principles (using C++) I'm teaching OO / class design from first principles today ... in stages. The chosen source language is C++, but the principles are well applied across other OO languages too. Stage 1 - write your test program to make sure it works for your customers want to do. Remember that the "customer is king" ...	2014-12-30
4326	Learning to program - comments, documentation and test code Updates material from our courses for newcomers to programming ... we're very happy to help newcomers learn about the basic principles of programming, running an extra day for a very small group on the front of our regular courses for delegates who have programmed before, but in different languages. In ...	2014-11-22
3810	Reading files, and using factories to create vectors of objects from the data in C++ On our C++ courses, we concentrate on objects and object design. But we also take a wider look at topics such as references and templates that go to making the complete language, with sections covering changes to things like file handling from the underlying C language. I've just added a new example ...	2012-08-11
3252	C++ - unknown array size, unknown object type. Help! There are time when you're writing a program where you say "I don't know". • I don't know how many records / object I'm going to read from a data file into an array - so I can't set the size of my array • I don't know what sort of object I'll be creating from a line I've read from a data ...	2011-04-17
3069	Strings, Garbage Collection and Variable Scope in C++ In C, you'll handle strings as arrays of chars (type char *) and that does work - but with grumbles from the compiler about deprecation - in C++. The more modern (or shall we say "more OO") approach is to handle strings as objects - and those will be objects of type string, with headers loaded via   #include ...	2010-12-04
3067	Using C and C++ functions in the same program - how to do it If you have some native C functions that you want to include in your C++, can you do so? The answer is a - slightly reserved - yes. Firstly, you need to have your main program in C++ rather than being one of the C elements. Then you need both the C and C++ compilers to be from the same family / ...	2010-11-24
2851	Further C++ material - view new or old I've taken out the old header <iostream.h> and replaced it by the current <iostream>. I've adding in using namespace std; where I've need to, in order to allow me access to cin and cout without a need to prefix then with std:: under the new header file (and to save me loads of errors at load ...	2010-07-04
2674	Make and makefiles - a commented example to help you learn If you're making an executable C++ file you build it from a whole lot of .o files, each of which you have compiled from a .cpp file. And you also build in library files. If you change a .cpp file, then you have to recompile it into a .o ... but don't forget that you also have to recompile the .cpp ...	2010-03-13 (longer)
2673	Multiple Inheritance in C++ - a complete example C++ and some other OO languages support multiple inheritance ... Java and some others do not, and it's often argued that multiple inheritance is an unnecessary complication. That may be the case in some languages, but certainly in Perl 5 it is necessary to have it to make use of eome of the modules ...	2010-03-12
2646	Compile but do not run PHP - syntax check only The -l option to PHP on the command line compiles but does not run the code in the file - so it's very useful for syntax checking your code. Here's an example where I tested a file with a deliberate mistake: -bash-3.2$ php -l wsse.php Parse error: syntax error, unexpected '{', expecting '(' in wsse.php ...	2010-03-03
925	C++ - just beyond the basics. More you can do Things you can do in C++ ... just a bit beyond the first basics of a class: 1. You can declare that a method is const if it doesn't change any of the instance variables and that will make it a bit more efficient when you run it. 2. You can refer to an instance variable within a method using this-> ...	2009-01-01
1181	Good Programming practise - where to initialise variables It's a good idea to initialise your variables directly before you use them for the first time if you're going to use them as accumulators. By accumulator I mean that you're going to write assignments such as:   $n += 4; # Perl   incr notepad; # Tcl   lappend flcodes [lindex ...	2007-05-11
945	Code quality counts We're celebrating Geekmas this weekend ... and we've got a full place. Plus others who are coming in for the day. Really good session yesterday on the good DESIGN of an interactive (scripted) web site that "mines" user information to give a tailored presentation, and a great intro by Paddy to Python's ...	2006-11-26
836	Build on what you already have with OO If I start recalling a "Goons" sketch, then I'll show my age .... but never mind. It was a RERUN that I saw ;-) Spike Milligan is counting votes at an election. "Two thousand, six hundred and forty two". "Two thousand, six hundred and forty three". "Two thousand, six hundred and forty four" ... "Would ...	2006-08-18

Expense.cpp	A second subclass for multiple inheritance demo
Expense.h	Header file for second subclass
Film.cpp	main subclass for multiple inheritance demo
Film.h	header file for main subclass - multiple inheritance demo
Filmtest.cpp	Main program for multiple inheitance demo
HireFilm.cpp	Main class for multiple inheritance demo
HireFilm.h	Main class specification - multiple inheritance demo
Make_mark_2	Alternative Makefile to show Makefile facilities
Makefile	Makefile for multiple inheritance demo
Ninety.cpp	vector, factory method, files, tokeniser
alltogether.cpp	7 file example
complete.cpp	this, vector, factory, inherrited constructor, file input, tokeniser
flow.cpp	Reading a file named on the command line within a factory
fourthobject.cpp	7 file full example with a factory and a vector
pd1.cpp	Inheritance in C++ - base demonstration
pd2.cpp	add an array of objects
pd3.cpp	Add an object comparator
pd4.cpp	add iostream / namespace, inline, new, printing function, override +
pd5.cpp	Switching from array to vector
service_11.cpp	classes and subclasses
trains.txt	Data file for flow / flow2 / flow4 examples