Converting currency

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as the title says, my program converts u.s currency to a foreign countries currency.

for some reason when i run the program and i choose a country, its always displaying Egyptian pound currency instead. no matter what country i select its always calculating the currency to epyptian pound. can someone help me fix this problem?

  * Description: Allows the user to enter an amount in U.S dollars. The program
 * then presents a menu of foreign currencies from which to select an exchange.
 * When the user makes a currency selection, the program displays the U.S dollar
 * amount the user entered in the target currency.
 * =============================================================================
 * Created on May 13, 2014, 6:44 PM
 */

#include <cstdlib>
#include <iostream>
#include <string>
#include <iomanip>

const float RUSSIAN_RUBLE = 31.168;
const float NORTH_KOREAN_WON = 135.00;  /* variables which hold global constants   */       
const float CHINESE_YUAN = 6.832;
const float CANADIAN_DOLLAR = 1.1137;
const float CUBAN_PESO = 1.0;
const float ETHIOPIAN_BIRR = 9.09;
const float EGYPTIAN_POUND = 5.6275;    
const float TUNISIAN_DINAR = 1.3585;
const float THAI_BAHT = 34.4;

float getDollarAmount();
void DisplayCurrencies();
char GetcurrencySelection();
bool IsSelectionValid( char test);
float CalcExchangeAmount (char selection, float DollarAmount);
void DisplayResults(float DollarAmount, float Exchange, std::string Nameofcountry);

using namespace std;



/* ==main=======================================================================
 * 
 * =============================================================================
 */
int main(int argc, char** argv) 
{
    char selection;
    float DollarAmount; // variables, it will hold values for the program
    char choice;
    float Exchange;
    string Nameofcountry;
    float Amount;
    
    do
    {   // clears the screen when the loop restarts
        system ("cls");
        // it is a function call and gets the results from dollar maount
        DollarAmount = getDollarAmount();
        // this is a function call, it displays the currencies for the user
        DisplayCurrencies();
        // function call, retrieves the selection from the user
        choice = GetcurrencySelection();
        
        // gets the user input and assigns the input to the variable "choice"
        switch(toupper(selection))
        {
            case 'A': Nameofcountry = "Russian Rubles";
            break;
            case 'B': Nameofcountry = "North Korean Won";
            break;
            case 'C': Nameofcountry = "Chinese Yuan";
            break;
            case 'D': Nameofcountry = "Cuban Peso";
            break;
            case 'E': Nameofcountry = "Ethiopian Birr";
            break;
            case 'F': Nameofcountry = "Thai Baht";
            break;
            case 'G': Nameofcountry = "Canadian Dollars";
            break;
            case 'H': Nameofcountry = "Tunisian Dinar";
            break;
            case 'I': Nameofcountry = " Egyptian Pound";
            break;
        }
        
        // Function call, the variable "Amount"
        //accepts the calculation of "CalcExchangeAmount"
        Amount = CalcExchangeAmount (choice, DollarAmount);
        // function call, displays the results from each given variable
        // in the arguement
        DisplayResults(DollarAmount,Amount,Nameofcountry);          
        
    cout << " would you like to restart and try again? (Y/N)"<< endl;
    cin >> choice;
        
    }   while(toupper(choice)=='Y');
    
    return 0;
}  
     
//== getDollarAmoun ============================================================
// this function retrieves the users amount and it is then accepted into the
// variable amount. it is then returned back to main where the value is held in
// " DollarAmount"
//
//Precondition: 
//      Not available
//Post-condition:
//      the value is returned to main and the variable "DollarAmount" then is
//      responsible for holding that value.
//==============================================================================
float getDollarAmount()
{
    float Amount;
    cout << "enter the desired U.S currency you wish to exchange please\n";
    cin >> Amount;
    return Amount;
    
}// end of getDollarAmount()
//==============================================================================
////== DisplayCurrencies() =====================================================
// 
// Display the menu for the currencies
// 
//
//Precondition: 
//      not available
//Post-condition:
//      display the selected country
//     
//==============================================================================
void DisplayCurrencies()
{
    cout << "choose one good sir or ma'am"<< endl;
    cout << "A Russian Ruble\n";
    cout << "B North Korean Won\n";
    cout << "C Chinese Yuan\n";
    cout << "D Cuban Peso\n";
    cout << "E Ethiopian Birr\n";
    cout << "F Thai Baht\n";
    cout << "G Canadian Dollars\n";
    cout << "H Tunisian Dinar\n";
    cout << "I Egyptian Pound\n";
}// end of DisplayCurrencies()
// =============================================================================
////== GetcurrencySelection() ==================================================
// function, accepts the selection from user and checks if its valid.
// If it is valid, the "selection" variable would hold that validity. 
// 
//
//Precondition: 
//      
//Post-condition:
//      
//     
//==============================================================================

char GetcurrencySelection()
{
    char selection;
    cout << "enter your selection: \n";
    cin >> selection;
    
    while(!(IsSelectionValid(selection)))
    {
        cout << "error please try again. Please make a selection";
        cin >> selection;
    }
    return selection;
    
}// end of GetcurrencySelection()
// =============================================================================
////==  =====================================================
// 
// 
// 
//
//Precondition: 
//      
//Post-condition:
//      
//     
//==============================================================================
bool IsSelectionValid( char selection)
{
    bool test;
    
    if (toupper(selection) >= 'A' && toupper(selection) <= 'I')
    {
        test = true;
    }
    else {
        test = false;
    }
    return test;
} // end of IsSelectionValid()
// =============================================================================
////==  =====================================================
// 
// 
// 
//
//Precondition: 
//      
//Post-condition:
//      
//     
//==============================================================================
float CalcExchangeAmount (char selection, float DollarAmount)
{
    float amount;
    
    switch (toupper(selection))
    {
        case'A':  amount = RUSSIAN_RUBLE * DollarAmount;
        break;
        case 'B': amount = NORTH_KOREAN_WON * DollarAmount;
        break;
        case 'C': amount = CHINESE_YUAN * DollarAmount;
        break;
        case 'D': amount = CANADIAN_DOLLAR * DollarAmount;
        break;
        case 'E': amount = CUBAN_PESO * DollarAmount;
        break;
        case 'F': amount = ETHIOPIAN_BIRR * DollarAmount;
        break;
        case 'G': amount = EGYPTIAN_POUND * DollarAmount;
        break;
        case 'H': amount = TUNISIAN_DINAR * DollarAmount;
        break;
        case 'I': amount = THAI_BAHT * DollarAmount;
    }
    return amount;
}// end of CalcExchangeAmount()
// =============================================================================
////==  =====================================================
// 
// 
// 
//
//Precondition: 
//      
//Post-condition:
//      
//     
//==============================================================================
void DisplayResults(float DollarAmount, float Amount,string Nameofcountry)
{
    cout << "\n$ " << fixed << setprecision(2)<< DollarAmount 
         << " is " << fixed << setprecision(2) << Amount
         << " "    << Nameofcountry << "." << endl;
}// end of DisplayResults
// ============================= 

[wildblue]

line 59 - that switch case should be on choice, not selection

line 210 to 226 - these don't match the order in which you have the currencies in the menu

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thank you!!