POJ ( acm.pku.edu.cn ) 2105

早年写的

#include <iostream>
using namespace std;

int main()
{
  int i,j,k,n;
  int a[4];
  char **cIp;
  cin>>n;
  cIp=new char* [n];
  for(i=0;i<n;i++) cIp[i]=new char[36];
  for(i=0;i<n;i++) cin>>cIp[i];
  for(i=0;i<n;i++)
  {
      a[0]=a[1]=a[2]=a[3]=0;
      for(k=0;k<4;k++)
      {
          for(j=k*8;j<k*8+8;j++)
          {
              a[k]<<=1;
              a[k]+=cIp[i][j]=='0'?0:1;
          }
          cout<<a[k]<<(k==3?'\n':'.');
      }
  }
  for(i=0;i<n;++i) delete[] cIp[i];
  delete[] cIp;
  return 0;
}