C程序习题-计算数的补码[12.5]

#include <stdio.h>

unsigned short int getbits(unsigned short value);
int main(int argc,char *argv[])
{
    unsigned int short a;
    printf("input an octal number:");
    scanf("%o",&a);
    printf("result:%o\n",getbits(a));
    system("pause");
    return 0;
}

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;
}