POJ
http://poj.org/problem?id=2105
IP Address
#include <stdio.h>
int main(int argc,char *argv[])
{
int n;
int i;
char bits[33];
int ip;
scanf("%d",&n);
while(n--)
{
scanf("%s",bits);
ip = bits[0]%48;
for(i = 1;i<32 ; ++i)
{
if(i%8 == 0){
printf("%d.",ip);
ip = bits[i]%48;
}else
ip = 2*ip + bits[i]%48;
}
printf("%d\n",ip);
}
return 0;
}