poj 2105 IP Address

#include "iostream"#include "string" #include "cmath"using namespace std;int main(){    int tc, i, j, k, ans[4], len;    string input;    cin >> tc;    while (tc--)    {          memset(ans, 0, sizeof(ans));          cin >> input;          len = input.length();          for (i = 0, j = 0, k = 7; i < len; i++, k--)          {              if (i && i % 8 == 0)              {                   j++;                  k = 7;              }              ans[j] += pow(2, (double)k) * (input[i]-48);          }          printf("%d.%d.%d.%d\n", ans[0], ans[1], ans[2], ans[3]);    }        system("pause");}//下面是別人的代碼，主要是學習了函數strtol（）！ /*#include"stdio.h"#include"string.h"#include "stdlib.h"int main(){int n;scanf("%d",&n);while(n--){char a[33],temp[9];int i,j;        scanf("%s",&a);        j=0;                for(i=0;i<strlen(a);i++)                 {            temp[j++]=a[i];            if(j==8)              {         temp[j]='\0';        if(i!=strlen(a)-1)           printf("%d.",strtol(temp,NULL,2));        else           printf("%d\n",strtol(temp,NULL,2));         j=0;              }                 }  }return 0;}*/