Question

warning: passing argument 1 of 'bsearch' makes pointer from integer without a cast

and the corresponding code is

Parent =bsearch((const size_t)ParentNum, ClauseVector, Size,
                  sizeof(CLAUSE),pcheck_CompareNumberAndClause);

the compilar is gcc.

here CLAUSE is defined as *CLAUSE.

@Paul This following more information has been added:

The change i made to the above code is :

Parent =bsearch((uintptr_t*)(size_t)(const)ParentNum,(uintptr_t*) ClauseVector,Size,
                  sizeof(CLAUSE),pcheck_CompareNumberAndClause);

After compiling i got following warning:

warning: type defaults to 'int' in declaration of 'type name'

how can i correct it?

Answer 1

The signature for bsearch is:

void * bsearch(const void *key, const void *base, size_t nel, size_t width, int (*compar) (const void *, const void *));

It should be pretty obvious that the first parameter (at least) in your code is incorrect.

Without seeing the rest of your code it’s hard to fix this but it should probably be something like:

Parent = bsearch(&ParentNum, (void *)ClauseVector, Size,
                  sizeof(CLAUSE), pcheck_CompareNumberAndClause);

It would help if you posted the definitions of ParentNum, ClauseVector, Size, CLAUSE, etc.