#include <stdio.h>

int get_filesize(char *s);

int main(int argc, char *argv[]) {
 
   if (argc != 2) {
      fprintf(stderr,"Usage: %s filename\n", argv[0]);
      return 1; 
   }   
 
   fprintf(stderr,"Finding size of file %s:\n", argv[1]);
   fprintf(stderr,"get_filesize returned %d\n",get_filesize(argv[1]));
   return 0;
}