Deleting a key and associated data
#include "btree.h"
int btdel(BTA* btact, char* key);
The btdel function deletes a key and data
record in the file associated with the
btact context pointer.
key is a character pointer, identifying
the key to delete. If deletion of the key and data is
successful, btdel returns zero.
A non-zero return from btdel indicates an
error occurred.