zoj 1073 Round and Round We Go

#include "iostream"
#include "string"
#include "algorithm"
using namespace std;

int main(int argc, char* argv[])
{
string str;
while (cin >> str)
{
string ss = str;
int length = str.size();
if (length == 1) break;
int temp = 0, flag = 0;
string s;
for (int j = 1; j <= length; j++)
{
s = "";
str = ss;
for (int i = length - 1; i >= 0; i--)//大数相乘的做法！
{
int ans = (str[i]-48) * j + temp;
if (ans >= 10)
{
temp = ans / 10;
ans %= 10;
}
else
{
temp = 0;
}
if (i == 0 && temp != 0)
{
s += (temp + 48);
break;
}
s += (ans + 48);
}
sort(str.begin(), str.end());//将两个字符串进行一个排序之后就容易比较出两个字符串是否相等了！
sort(s.begin(), s.end());
if (s != str)
{
flag = -1;
break;
}
else
continue;
}
if (flag == 0)
cout << ss << " is cyclic" << endl;
else
cout << ss << " is not cyclic" << endl;
}
return 0;
}