C语言：2.2

#include <stdio.h>
int main()
{
unsigned short bla=32768;
short blb=32768;
printf("%d      %d\n",bla,blb);
unsigned short blc=65534;
short bld=65534;
printf("%d      %d\n",blc,bld);
getchar();
}

-2由来分析如下图