ASCII码排序

#include<iostream>
using namespace std;
int main()
{
    char s[3];
    while (cin >> s)
    {
        for (int i = 0; i < 3; i++)
        {
            for (int j = i + 1; j < 3; j++)
            {
                if (s[j] < s[i])
                {
                    int temp = s[i];
                    s[i] = s[j];
                    s[j] = temp;
                }
            }
        }
        cout << s[0];
        for (int i = 1; i < 3; i++)
        {
            cout << "  " << s[i];
        }
        cout << endl;
    }
    return 0;
}