如果你要那么做 需要 unsigned long long 


> #include <stdio.h>
> int N,i;
> unsigned a;
> char tmp;
> int main()
> {
>     scanf("%d\n",&N);
>     while(N--)
>     {
>         a = 0;
>         for(i=31; i>=0; i--)
>         {
>             tmp = getchar();
>             if(tmp == '1')
>                 a += 1<<i;
>         }
>         tmp = getchar();
>         printf("%d.%d.%d.%d\n",a>>24,(a>>16)%256,(a>>8)%256,a%256);
>     }    
>     return 0;
> }