missing function header
 

i can't get this to run. my math functions at the end have messed up logic.
and the superfluous function headers and such. i don't think the math output is linked to the desired output of the payment.

 

#include <iostream.h> 

#include <math.h> 

#include <cstdlib>

#include <iomanip> //here i am just throwing stuff in to try and fix the "missing function header"

int main( )

 {

   

   double months, amount, rate;                  

   double MonthlyPayment (double amount, double rate, int months);          

   int GetChoice(void);   

   int option; 

   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; 

                 cout << "\tYour monthly payment is $ ";                           

          option = GetChoice(); 

   } 

   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; 

} 



{ 



  int (amount * months) / rate = MonthlyPayment; 

  return MonthlyPayment;

}

Re: missing function header
 

I Don't know what the program about .. and what the last function about ?
maybe u must define the fuction to make it work . then you must declare the variables inside it .coz those variables are declared as local variable in main()..