Greetings, > I declare a struct and pass it as the 4th argument of sqlite3_exec(), > and define the 1st argument of callback function a pointer to this kind > of struct. while compiling, GCC give a warning like this: > ae.c: In function ‘main’: > ae.c:56: warning: passing argument 3 of ‘sqlite3_exec’ from > incompatible pointer type
The problem here is the type of your callback() function. By declaring the first argument to it as MyStruct*, rather than void* as in the function pointer type of the 3rd argument to sqlite3_exec(), you're creating an incompatible function pointer type. > however, the program runs well. What may causing the warning? what > should i do to get rid of this warning. Simply change the type of the first argument to your callback function to void* and the problem should go away. Of course you'll then have to cast back to MyStruct* inside callback() to actually use the value. Hope this helps, -- Markus Thiele _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
