#include <iostream.h> 
double MonthlyPayment (double amount, double rate, int months);	  
int GetChoice(void);
 
int main( );
 
//struct Choice
static const Choice menu[] = ( 7, 5.35, 15, 5.5, 30, 5.75 ); //if i put the colon before menu= lots of errors
{
  int	term;
  double rate;
  void Show()
  {
	 std::cout << term << " years @ " << rate << '%' << std::endl;
  }
};
 
int main();
{
 
  size_t selection;
  do
  {
	 for ( size_t i = 0; i < sizeof menu / sizeof *menu; ++i )
	 {
		std::cout << '(' << i << ") ";
		menu[i].Show();
	 }
	 std::cout << "Selection ? ";
	 std::cin  >> selection;
  } while ( selection >= sizeof menu / sizeof *menu );
  std::cout << "Your selection:\n";
  menu[selection].Show();
  return 0;
}
{
 
	double months, amount, rate;		  
	int option;   
 
	//create a loop
	while((option = GetChoice()) == 1)
	{
		//option = GetChoice();
		cout << "Enter the loan amount: ";
		cin >> amount;
		cout << "Enter the interest rate (X.Y): ";
		cin >> rate;
		cout << "Enter the length of the loan in months : "; 
		cin >> months; 
		//this line will generate a loss of data warning
		cout << "\tYour monthly payment is $ "<<MonthlyPayment(amount, rate, months)<<endl;
 
	} 
	return 0; 
}
 
int GetChoice(void) 
{ 
 int num; 
 cout << endl;   
 cout << "1. Calculate your monthly payment on the loan."
	  << endl << "You will enter the loan amount, Interest rate, and Length of the loan" << endl;  
 cout << "0. Exit the program" << endl; 
 cout << "Press 1 to procede : "; 
 cin >> num;
 return num; 
} 
 
double MonthlyPayment (double amount, double rate, int months) 
{ 
//declare a local variable to be used for calc's and to hold return value, not function name!
double monthPayment;
// do the calc's
//amount, months and rates values declared in prototype parameters, no need to define local variables
monthPayment = (amount * months) / rate /1200; 
 
return monthPayment; //return the double
}