Euro/Dollar

#include <iostream>
#include <string>

using namespace std;

int main(int argc, char *args[])
{
    start:
    char mtype, again;
    float value, other_value;
    cout << "--------------------------------------------------------------------" << endl;
    cout << "Euro->Dollar->Euro [Umrechner von Euro zu Dollar und umgekehrt]" << endl;
    cout << "--------------------------------------------------------------------" << endl << endl;
    retype_mtype:
    cout << "Möchtest du den Euro- oder den Dollar-Betrag angeben? [e/d]: ";
    cin >> mtype;
    fflush(stdin);
    if (mtype != 'e' && mtype != 'd') goto retype_mtype;
    cout << endl << "Bitte gib einen Betrag in " << (mtype == 'e' ? ("Euro") : (mtype == 'd' ? ("Dollar") : (""))) << " an: ";
    cin >> value;
    fflush(stdin);
    switch (mtype)
    {
        case 'e': {
            other_value = value * 1.1f;
            break;
        }
        case 'd': {
            other_value = value / 1.1f;
            break;
        }
    }
    cout << endl << value << (mtype == 'e' ? (" Euro") : (mtype == 'd' ? (" Dollar") : (""))) << " sind umgerechnet " << other_value << (mtype == 'e' ? (" Dollar") : (mtype == 'd' ? (" Euro") : (""))) << endl;
    retype_again:
    cout << "Möchtest du noch mehr umrechnen? [y/n]: ";
    cin >> again;
    fflush(stdin);
    if (again != 'y' && again != 'n') goto retype_again;
    else if (again == 'y') goto start;
    else if (again == 'n') return(0);
}