c - Seg Fault With libjpeg -

i can't make sense of segmentation fault i'm getting out of following code:

#include <stdio.h>  #include <jpeglib.h> #include <stdlib.h>  int main(int argc, char** argv){     file*                   outfile;     jsample*                row_pointer;     struct jpeg_error_mgr   jerr;     long long int           *w, *h;      setsomepointers(w, h);      printf( "%lld  %lld\n", *w, *h); } 

commenting out 1 of first 3 declarations fix it...

oddly, following code works:

#include <stdio.h>  #include <jpeglib.h> #include <stdlib.h>  int main(int argc, char** argv){     file*                   outfile;     jsample*                row_pointer;     struct jpeg_error_mgr   jerr;     long long int           w, h;      setsomepointers(&w, &h);      printf( "%lld  %lld\n", w, h); } 

is there strange happening, or need hit c tutorials?

this totally undefined behavior - dereference uninitialized pointers.

the actual problem in

printf( "%lld  %lld\n", *w, *h); 

the other things declarations. should not dereference w , h, not initialized @ all. has nothing commenting/uncommenting of first (3) lines.