Thread: qsort using function ptr

I have two structs one which holds car information. The function I am writing requires to sort the list by an entered key. The list struct holds the function ptr to use. Can I use this pointer in qsort? I have tried
qsort(pcl->list,pcl->size,sizeof(pcl->list[i]),pcl->CompareFPtr);
but it gives the warning: parsing of arg 4 'qsort' from incompatible pointer type.

any ideas??

typedef struct
{
char *dynamicMake;
char *dynamicModel;
int year;
char rego[7];
} Car;

typedef struct List
{
Car list[LISTSIZE];
unsigned size;
int(*CompareFPtr)(Car*,Car*);
} List;

Any light shed appreciated.

I have changed the function pointer to

[code]/*

int(*CompareFPtr)(const void*,const void*);
/*[code]

and still give parse error message is the correct syntax for a struct (pcl) holding a function pointer for the 4th arg of qsort

pcl->CompareFPtr ??

can i use a function pointer in arg 4 of qsort??

thanks

Thanks, fixed it
I had a structure with the function pointer stored ie

[code]*/
typedef struct List
{
Car list[LISTSIZE];
unsigned size;
int(*CompareFPtr)(const void*,const void*);
} List;

[code]

I have 4 different compare functions I store the relevant one to user in the struct function pointer. ie

[code]
int(*MakeCompare) (Car*, Car*),
int(*ModelCompare) (Car*, Car*),int(*YearCompare) (Car*, Car*),
int(*RegCompare) (Car*, Car*));
[code]/*

I have change my function pointer parameters to void and then type cast the relevant compare function when assigning it ie

[code]
pcl->CompareFPtr=(int (*)(const void*, const void*))MakeCompare;
[code]

i can now use qsort...
works fine and minimum changes.

Code:

/*

printf("Sorry about that!! Have it sussed now!");

*/