[lug] C programming Q.

[Archer Sully]

On Wednesday 17 April 2002 10:54, you wrote:

> We have a struct that has a function pointer as a member, such as:
>
> typedef struct teststruct{
>     char *name;
>     int (*fp) (void);
>     int test_type;
> } teststruct_0;
>
> An initialization using this struct looks like this:
>
> teststruct_0 tests_noarg[] =
> {
> 	{"Stuck Address", test_stuck_address, someval}
> }
>
> The function "test_stuck_address" has this prototype:
>
>     int test_stuck_address (uint *val1, uint *val2, uint count);
>
> During compile, the error we get is this:
>
>     file.c:xxx: warning: initialization from incompatible pointer type
>

Correct.  The prototype of the function pointer does not match
the function that you are trying to pass.  You need to change the
fp to int (*fp)(uint *, uint *, uint).  Then it should all work.  Of course,
I'm too lazy to try it myself... ;-)

-- archer