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For 2021 - online Python 3 training - see ((here)).

Our plans were to retire in summer 2020 and see the world, but Coronavirus has lead us into a lot of lockdown programming in Python 3 and PHP 7.
We can now offer tailored online training - small groups, real tutors - works really well for groups of 4 to 14 delegates. Anywhere in the world; course language English.

Please ask about private 'maintenance' training for Python 2, Tcl, Perl, PHP, Lua, etc.
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 cost
 
tc is gross.
 
*/
 
 
items = 0;
tc = 0.0
tc += vatable(17.6,2);
tc += vatable(18.4,4);
tc += vatfree(19.5,3);
 
printf ("............", items, tc);





You'll work out from the pseudocode that items needs to be a global variable - and that really the vatable and vatfree functions should be in a separate file. That brings function templates and extern into play in the example.

Solution - source code of main file [here] and of the the functions [here].

The compile line to build the application under gcc would be as follows:
  gcc -o xrcz xrcz.c taxi.c
or to separate out the compiles:
  gcc -c taxi.c
  gcc -c xrcz.c
  gcc -o xrcz xrcz.o taxi.o
(written 2010-06-30)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
C204 - C and C based languages - Functions, Macros and programs in multiple files
  [775] Do not duplicate your code - (2006-06-23)
  [1163] A better alternative to cutting and pasting code - (2007-04-26)
  [1478] Some new C programming examples - files, structs, unions etc - (2007-12-19)
  [2570] Function Prototypes in C - (2010-01-11)
  [2575] Sharing variables between files of code in C - extern - (2010-01-14)
  [3237] Using functions to keep look and feel apart from calculations - simple C example - (2011-04-09)
  [3717] Returning extra results from a function in C - (2012-05-03)
  [3721] Naming blocks of code, structures and Object Orientation - efficient coding in manageable chunks - (2012-05-06)
  [4338] Passing arrays into functions in C - (2014-12-02)
  [4554] Passing information into functions in C - by name, by value - (2015-10-26)
  [4555] Preprocessor directives in C and C++ - what they mean - (2015-10-27)
  [4557] Function prototype - what they are and why you should use them - C and C++ - (2015-10-27)


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Staring a C course with Hello World - why?
Some other Articles
Objects and Inheritance in C++ - an easy start
Learning about Regular Expressions in C through examples
String functions in C
Staring a C course with Hello World - why?
C Course exercise and sample answer - source in 2 files
Just pass a pointer - do not duplicate the data
Software versions used - June 2010
Respecting our customers anonimity
Lorry Parking in Melksham
Perl - the duplicate key problem explained, and solutions offered
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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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