Again pls help

[cijagm]

I am trying to decrypt a morsecode to letter's, the input should be morsecode and output should be letter's i have been trying for the last 4-5 hour's but i can' get it right, i know something is wrong with the 2nd for loop since is only looping trough the first character in the morse code , but how do i change that.

here is the code:

#include <iostream>
#include <string>
#include <cstring>
#include <vector>
using namespace std;


string morse(string a);
int main()
{

string ord;

cout<< "\nwrite your morsecode  "	<<endl;
cin>>ord;


cout<<"the morse code decrypted is "<<morse(ord);

system("PAUSE");
return 0;
}


string morse(string a)
{
char g;
      string z[30]={".- ","-... ","-.-. ","-.. ",". ","..-. ","--. ",".... ",".. ",".--- "
              ,"-.- ",".-.. ","-- ","-. ","--- ",".--. ","--.- ",".-. ","... ","- "
              ,"..- ","...- ",".-- ","-..- ","--.. ",".--.- ",".-.- ","---. "};
      string u[30]={"A","B","C","D","E","F","G","H","I","J","K","L","M","N","O"
                    ,"P","Q","R","S","T","U","V","W","X","Y","Z","Å","Ä","Ö"}; 
      string klart="";                  
     
      for (int i = 0;i <a.size();i++)
      {
      char f =a [i];
      for (int j = 0; j <=29;j++)
      {
       string tmp=z[j];
         g=tmp[0];
        if(g==f)
      { 
        klart=klart +u[j];  
      
      }
       
      }  
      }    
return klart;
}