RomanType - menu driver

/*Matt Short
Project 1
CPSC 131
Purpose: Write a program as a menu driver to select a particular opertation to take place.*/
#include <iostream>
#include "RomanType.h"
using namespace std;

void DisplayMenu(); //A funtion that displays a menu of operations to choose from.
int GetCommand(RomanType& Result);  //A function that gets the users choice.
void RunChoice(int choice, RomanType& Result);  //A function that runs the choice of the user.

int main()
{
    RomanType Result=RomanType();
    int choice=0;   //int to store operation chosen by the user.
    while(choice!=7)
    //displays menu, prompts user for choice, runs choice
    //and continues doing so until user chooses 7=Quit
    {
        DisplayMenu();
        choice=GetCommand(Result);
        RunChoice(choice, Result);
    }
    return 0;
}

void DisplayMenu()
{
    //pre:none
    //post:menu is displayed for user
    cout<<"Choose an operation to execute:"<<endl;
    cout<<"1. Get Arabic number"<<endl;
    cout<<"2. Get Roman numeral"<<endl;
    cout<<"3. Convert from Arabic to Roman"<<endl;
    cout<<"4. Convert from Roman to Arabic"<<endl;
    cout<<"5. Print Arabic number"<<endl;
    cout<<"6. Print Roman numeral"<<endl;
    cout<<"7. Quit"<<endl;
}
int GetCommand(RomanType& Result)
{
    //pre:menu is displayed
    //post:prompts user for a choice, and gets users choice
    int choice;
    cout<<"Please enter the number of the operation you would like executed: ";
    cin>>choice;
    return choice;
}
void RunChoice(int choice, RomanType& Result)
{
    //pre: user has chosen an option
    //post:user choice is run
    switch(choice)
    {
        case 1: cout<<endl;
            Result.getArabicNumber();
            cout<<endl;
            break;
        case 2: cout<<endl;
            Result.getRomanNumber();
            cout<<endl;
            break;
        case 3: cout<<endl;
            Result.convertToRoman();
            cout<<endl;
            break;
        case 4: cout<<endl;
            Result.convertToArabic();
            cout<<endl;
            break;
        case 5: cout<<endl;
            Result.printArabic();
            cout<<endl;
            break;
        case 6: cout<<endl;
            Result.printRoman();
            cout<<endl;
            break;
        case 7: cout<<"Quitting program."<<endl<<endl;
            break;
        default: cout<<"Not a valid input."<<endl<<endl;
    }
}