Alfabet Morsea - SPOJ

#include <iostream>
#include <algorithm>
#include <map>
#include <locale>

using namespace std;

map < char, string > codeMorsea;
map < char, string >::iterator iter;

void setMap() {
    codeMorsea[ 'a' ] = ".-";
    codeMorsea[ 'b' ] = "-...";
    codeMorsea[ 'c' ] = "-.-.";
    codeMorsea[ 'd' ] = "-..";
    codeMorsea[ 'e' ] = ".";
    codeMorsea[ 'f' ] = ".-..";
    codeMorsea[ 'g' ] = "--.";
    codeMorsea[ 'h' ] = "....";
    codeMorsea[ 'i' ] = "..";
    codeMorsea[ 'j' ] = ".---";
    codeMorsea[ 'k' ] = "-.-";
    codeMorsea[ 'l' ] = "..-.";
    codeMorsea[ 'm' ] = "--";
    codeMorsea[ 'n' ] = "-.";
    codeMorsea[ 'o' ] = "---";
    codeMorsea[ 'p' ] = ".--.";
    codeMorsea[ 'q' ] = "--.-";
    codeMorsea[ 'r' ] = ".-.";
    codeMorsea[ 's' ] = "...";
    codeMorsea[ 't' ] = "-";
    codeMorsea[ 'u' ] = "..-";
    codeMorsea[ 'v' ] = "...-";
    codeMorsea[ 'w' ] = ".--";
    codeMorsea[ 'x' ] = "-..-";
    codeMorsea[ 'y' ] = "-.--";
    codeMorsea[ 'z' ] = "--..";
    codeMorsea[ ' ' ] = " ";
}

string convertLettersToLowercase( string str ) {
    locale loc;
    string outcome;
    for( string::size_type i = 0; i < str.size(); ++i )
         outcome += tolower( str[ i ], loc );
   
    return outcome;
}

string encode( string textToEncode ) {
    char slash = '/';
    string result;
    int textLength = textToEncode.size();
    for( int i = 0; i < textLength; i++ ) {
        map < char, string >::iterator iter = codeMorsea.find( textToEncode[ i ] );
        if( iter != codeMorsea.end() ) result += iter->second + slash;
       
    }
    return result;
}

int main() {
   
    string line;
   
    setMap();
   
    while( getline( cin, line ) ) {
        string afterChange = convertLettersToLowercase( line );
        cout << encode( afterChange ) << endl;
    }
   
    return 0;
}