C Course exercise and sample answer

C Course exercise and sample answer - source in 2 files

Archive - Originally posted on "The Horse's Mouth" - 2010-06-30 06:53:33 - Graham Ellis
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

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C Course exercise and sample answer - source in 2 files