Re: -Crawl- Compiling 4.1a

"Erik Piper" <erik@xxxxxx> writes:
> Darshan Shaligram wrote:
>> "Erik Piper" <erik@xxxxxx> writes:
>> > Error E2268 effects.cc 762: Call to undefined function 'tolower' in
>> > function acquirement(unsigned char,bool)

>> Put in a

>> #include <ctype.h>

>> along with the other #includes.

> Worked. (Also had to be done elsewhere.) Is there a simple "why" for
> this so that I might learn something from the incident?

Sure. The error was caused by the C++ compiler seeing a function call
to the unknown function 'tolower'. The compiler doesn't like unknown
functions, so you need to tell it what the function looks like by
saying (for instance):

int tolower(int);

in effects.cc. That's called a function prototype.

Now, 'tolower' happens to be a standard C function, which means the
compiler writer already did the work of writing all those tiresome
prototypes. In the case of 'tolower', the prototype is in the header
file ctype.h. #including it keeps the compiler happy.

> More importantly, if I might ask for help again... now it's barfing on
> itemprop.cc:

> Error E2232 itemprop.cc 50: Constant member 'armour_def::name' in class
> without constructors
> Error E2232 itemprop.cc 162: Constant member 'weapon_def::name' in
> class without constructors
> Error E2232 itemprop.cc 341: Constant member 'missile_def::name' in
> class without constructors
> Error E2232 itemprop.cc 363: Constant member 'food_def::name' in class
> without constructors

You probably need to change:

struct armour_def
{
armour_type id;
const char name[ITEMNAME_SIZE];

to

struct armour_def
{
armour_type id;
const char *name;

And do the same for weapon_def, missile_def, and food_def. It's
unclear to me why name was defined as a char array at all for those
structs.

--
Darshan Shaligram <scintilla@xxxxxxxxx> Deus vult
.

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