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2849 - What are C++ references? Why use them?
C++ References let you give variables alternative names. For example, if you write   int & jones = flossie; then "jones" becomes an alternative name for flossie in the current scope. If you assign something new to jones, you're not going to make the variable into an alternative name ....

2848 - C course - final course example puts it all together
"Yes - but how do we put all of those things together?" ... delegate question on many programming courses. As a trainer, I have to take our students through each of the main features of a language - to ensure they understand the fundamentals and perhaps more. But the it's just as important to tak ....

2847 - Local information for Melksham Hotel Guests
If you're visiting a new part of the country, what better than to have a selection of magazines and newspapers that cover the area available, so that you can browse and see what's going on? So we leave a copy of the current edition of the monthly Wiltshire Life in each of our rooms, and the previo ....

2846 - Catching up with an old friend
It was good - really good - to grab a lunch yesterday with a good friend and former work colleague I hadn't seen in 30 years. I met Paula when I was assigned to the Civil Service Department - see [here] for some of the technical stuff we did there. By the time I came to get a job at the end of my ....

2845 - Objects and Inheritance in C++ - an easy start
We can end up with a lot of files when we do even a simple C++ example to show inheritance - a file for the main program, a file each for the base class and subclass, and a header file for the prototypes for each of the base class and subclass too. So it's much easier to do it all as one file - but ....

2844 - Learning about Regular Expressions in C through examples
Although we more usually teach Regular Expressions on courses on Perl, Python, PHP, Ruby, etc ... there is also a standard C library, which uses the POSIX flavour of regular expressions, and I've put a short example together to "show you how". Firstly - what is a regular expression? It's a "patter ....

2843 - String functions in C
A String is a NUL terminated array of chars. Remember to allow space in the string for the NUL, and for any new line character you may have too, if you dimension it manually. And remember to add a NUL back on to the end if you extend a string by adding individual characters to it. There are lots o ....

2842 - Staring a C course with Hello World - why?
Every programming course starts with a "Hello World" program - that's a program which does no more than print out the words "Hello World" when you run it - truely minimalist. It's not just convention that courses start that way - it's also very sensible as it allows he tutor to teach the delagates ....

2841 - C Course exercise and sample answer - source in 2 files
Here's a sample exercise from the C course ... set yesterday to tailor the course for the particular group of delegates that we have this week: /* Complete my program ... ... in 2 files ... fixed VAT rate at compile time   Function params - cost per item (net) and no. of items at this co ....

2840 - Just pass a pointer - do not duplicate the data
When you want to pass a big bundle of data - such as an array - into a function, it's far more efficient to pass in just a single value in the form of a pointer to the array. That's the address in memory at which the array starts and that single value can provide the key to all the data without hav ....

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