Thread: how to use typedefs with structs?

Hey guys. Does anyone know how to use typedefs with structs, where they are held in a header file for use in a multi-file linked list project?

I am having trouble getting my head around it as the textbook doesnt give a lot of examples, and the assignment data types to be used contain errors in them.

Here the data types:
[code]
#define MaxRaces 5;
#define Maxname 30;

typedef strcut{
unsigned short Hours;
unsinged short Minutes;
unsigned short Seconds;
} Time;

typedef char Digit; /* 0..9*/
typedef Digit Sail[ 3+1 ];
typedef char Name[ MaxName + 1 ];

struct Boat{
Sail SailNum;
Name BoatName;
Time Duration[ MaxRaces ];
};

typedef struct Boat Boat; /*there s a Boat too much I think,but*/
/*not entirely sure why */
.
.
.
.
. /*there s some more of these data types but it d go on for*/
/*a fair bit longer so I am not gonna post it*/

If anyone could give me a hand in finding my direction I would very much appreciate.

Thanks Johannes

thanks for that. the 'strcut' was a typo. I can see what you mean but. Could the ';' have cuased a fair few compiler errors? because I had like a long list for my header file?
Thanks,Johannes

Yes, the ';' will introduce a compiler error. Note that you use MaxRaces in the declaration of an array. So after substitution of the #define you get this:

Time Duration [5;];

Which will cause a compiler error.

here s a few of the errors for the header file:

Code:

regatta.h:16: parse error before `;'
regatta.h:21: parse error before `Name'
regatta.h:21: warning: no semicolon at end of struct or union
regatta.h:22: parse error before `;'
regatta.h:28: parse error before `;'
regatta.h:32: parse error before `Boat'
regatta.h:32: warning: no semicolon at end of struct or union
regatta.h:33: warning: data definition has no type or storage class
regatta.h:34: parse error before `Place'
regatta.h:34: warning: data definition has no type or storage class
regatta.h:40: field `Racehistory' has incomplete type
regatta.h:43: warning: useless keyword or type name in empty declaration

Yeah I know. I havent had a chance to correct that problem yet. The file I attached was the original one that caused the errors. I ll get the changes done asap and see how I go. Appreciate the help. Cheers,
Johannes

That was exactly my problems. Those types have been given to us by our lecturer for the last assignments. We are to create a master file containing data for boats of different classes and then use linked lists to do different operations with their race results?!?
Thanks for pointing that out but.
Cheers,
Johannes

I sorted out the header problems. I had not included the 'tags'? for some of the typedefs, also some typo within the structs. I am still a bit shaky on the struct and typedef combination. Is it right that the 'tag' is what you can call the typedef struct by?
like

Code:

typedef struct Boat{...} Boat;

means that you have a 'variable' called Boat of type Boat?
Cheers,Johannes

Thanks for that. What I meant with putting the 'struct' infront of it is when I have defined it once before. But thanks a lot I think I finally understood what this is all about, Johannes.