anser.c

#include<stdio.h>
int main(void)
{
  int  hoge=0x00000000ffff00ff;
  long huga=0xffffffffffffffff;
  int  a=hoge-huga;
  long b=hoge-huga;
  printf("a = %016x\n",a);
  printf("b = %-16lx\n",b);
  return 0;
}