求补码怎么求的...#include #include void main (){unsigned short int

求补码怎么求的...
#include
#include
void main ()
{
unsigned short int a;
unsigned short int getbits(unsigned short);
printf ("ninput an octal number:");
scanf ("%o",&a);
printf ("%on",getbits(a));
}
unsigned short int getbits (unsigned short value)
{
unsigned int short z;
z=value&0100000;
if(z==0100000)
z=~value+1;
else
z=value;
return z;
}
输入152525怎么会输出25253呢?书上的例子,