Raspored pjesama

#include <iostream>
#include <cmath>
using namespace std;

string dugme1 (string k)
{
       string s="";

       for (int i=0; i<4; i++)
           s = s + k[i+1];

       s = s + k[0];
       return s;
}

string dugme2 (string k)
{
       string s="";

       s = k[4];

       for (int i=1; i<5; i++)
           s = s + k[i-1];
       return s;
}

string dugme3 (string k)
{
       string s="";

       s = s + k[1];
       s = s + k[0];

       for (int i=2; i<5; i++)
           s = s + k[i];
       return s;
}

main()
{
      string s = "ABCDE";
      int n,m;

      cin >> n >> m;

      while (n!=4)
      {
            switch(n)
            {
                     case 1: for(int i=0; i<m; i++) s = dugme1(s); break;
                     case 2: for(int i=0; i<m; i++) s = dugme2(s); break;
                     case 3: for(int i=0; i<m; i++) s = dugme3(s); break;
                     default: break;
            }
      cin >> n >> m;
      }

      cout << s << endl;

      system ("PAUSE");
}