How to compare structure elements

Hi,

I've working on this for hours now...

Here is my structure

Code:

#define MAX_ITEM 10

typedef struct {

     int stk_num,items_in_stk,min_stk,itm_on_ord,supplier;
     float reord_price;
     char desc[26],ord_ref[9];
} record;

record List[MAX_ITEM];

I am trying to display the contents in ascending order using qsort() function. This is how I am calling the sort function

Code:

qsort(List, MAX_ITEM, sizeof(List[0]), cmp_element);

And this is my comp_element function with which I am having problem and I can't figure it out myself

Code:

int cmp_element(record *ptr1, record *ptr2 )
 {
     return strcmp(ptr1->desc , ptr2->desc);

 }

But I am getting this error

Code:

[C++ Error] Stock4.c(206): E2342 Type mismatch in parameter '__fcmp' (wanted 'int (*)(const void *,const void *)', got 'int (*)(record *,record *)')

I believe its a very minor problem somewhere but I can't find it myself and time is running out...

Help please.....

> int cmp_element(record *ptr1, record *ptr2 )
Should be const void * parameters,
cast to record* inside the function

Originally Posted by Salem

> int cmp_element(record *ptr1, record *ptr2 )
Should be const void * parameters,
cast to record* inside the function

Well I tried this before

Code:

int intcmp(const void *ptr1, const void *ptr2 )
 {
     return strcmp((record *)ptr1->desc, (record *)ptr2->desc);

 }

But then I got this error...

Code:

[C++ Error] Stock4.c(223): E2288 Pointer to structure required on left side of -> or ->*

I have no clue how to solve this

Precedence!
((record *)ptr1)->member

Or just use another variable of the correct type

OMG !!!!!!!!

and I spent hours on this....

Anyway, thank you very much dear Salem. You saved me again


Edit :

vBulletin Message
You must spread some Reputation around before giving it to Salem again.

question:

why must it be const void * parameters
and then casted to record* inside the function. what was wrong with what he initially did?

> what was wrong with what he initially did?
Because the pointer to the function was of the wrong type.
qsort expects a pointer expecting two void* parameters, and returning int.
If it isn't that, it complains.