hello there..! can somebody help me how to call this function...the program function will appear when i select the case no 3 at swich code... however there is an error appear...bytheway is it correct i using "void loan_schedule ();"..to Generate loan payment schedule coding...when i choose number 3 at main menu...


#include <math.h> // pow()
#include <iostream.h>
#include <iomanip.h> // setprecision(), setw()



///////////////////////////////////////////



int show_menu();
void loan_schedule ();

///////////////////////////////////////////////////////////////



int show_menu()

{

int answer;

void ProcessInterestAmount();

cls();

cout<<endl<<endl;

cout<<"\t%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%"<<endl;

cout<<"\t% A'LONG CAR LOAN FEATURES %" <<endl;

cout<<"\t%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%"<<endl<<endl<<endl;



cout << "What kind of value do you want to estimate?";

cout << "\n1 - Calculate the monthly installment";

cout << "\n2 - To take loanEstimate the interest rate applied on a loan";

cout << "\n3 - To build laon schedule";

cout << "\n4 - Estimate the interest rate applied on a loan";

cout<<"\n5 - EXIT"<<endl<<endl;





cout<<"\t\tCHOOSE YOUR SELECTION :";



cin >> answer;



switch(answer)

{

case 1:

{ monthlyinstallament();

break;}

case 2:

{ totakeloan();

break;}

case 3:

{ loan_schedule();

break;}/*

case 4:

ProcessPrincipal();

break;

case 5:

ProcessPeriod();

break;*/

default:

cout << "\nInvalid Selection\n";

}



getch ();

return 0;



}





/////////////////////////////////////////////////////////







// Generate loan payment schedule







void loan_schedule(double principal,double interest_rate,double term_years,double compounding_periods_per_year);



int main(int argc,char *argv[])



{



double inprincipal, inrate, interms;







if (argc > 1)



inprincipal = atof(argv[1]);



else {



cout << endl << "Amount of loan";



cin >> inprincipal;



}



if ( inprincipal< 0.005) {



cout << "Bad loan amount!" << endl;



return 1;



}







if (argc > 2)



inrate = atof(argv[2]);



else {



cout << "Annual interest rate(%):";



cin >> inrate;



}



if ( inrate < 1) inrate *= 100;



if ( inrate< 1) {



cout << "Bad interest rate!" << endl;



return 1;



}







if (argc > 3)



interms = atof(argv[3]);



else {



cout << "Number of years:";



cin >> interms;



}



if ( interms< 0.005) {



cout << "Bad number of years!" << endl;



return 1;



}







loan_schedule( inprincipal, inrate, interms, 12);







return 0;



}







void loan_schedule(double principal,double interest_rate,double term_years,double compounding_periods_per_year)



{



double irate; // interest rate



double term; // number of compounding periods for life of loan



double paymt; // payment per compounding period.



int paymentnum; // number of payments



double balance; // running remaining principal to be paid



double totalpayment; // accumulated payments



double totalipaid; // accumulated interest paid



double totalppaid; // accumulated principal paid











// Generate header







cout << endl;



cout << "Loan Payback Schedule" << endl;



cout << "on $" << setprecision(2) << principal ;



cout << " at " << interest_rate << "%" ;



cout << " annually for " << term_years << " year(s)" << endl ;







if (fabs(compounding_periods_per_year - 1) > 0.0001) {



cout << "compounded " << compounding_periods_per_year;



cout << " times per year" << endl;



}







cout << endl;



cout << "PAYMENT # ";



cout << "BALANCE ";



cout << "PAYMENT ";



cout << "INTEREST PAID ";



cout << "PRINCIPAL PAID ";



cout << "REMAINING";



cout << endl << endl;







// Initialize variables for loop







irate = interest_rate/(100*compounding_periods_per_year);



term = term_years*compounding_periods_per_year;



paymt = ceil(100*principal*irate*pow(1+irate,term)



/(pow(1+irate,term)-1))



/100;







paymentnum = 0;



balance = principal;



totalpayment = 0;



totalipaid = 0;



totalppaid = 0;







cout.setf(ios::fixed | ios::showpoint);



cout.precision(2);







// Report each period's payment







while (balance>0.005) { // need to pay if more 1/2 cent outstanding



cout << setw(9) << ++paymentnum;



cout << setw(9) << balance;



if (paymt > balance*(1+irate))



paymt = ceil(100*balance*(1+irate)-0.5)/100;



cout << setw(9) << paymt;



totalpayment += paymt;



cout << setw(15) << balance*irate ;



totalipaid += balance*irate;



cout << setw(16) << (paymt-balance*irate);



totalppaid += paymt - balance*irate;



balance -= paymt - balance*irate;



cout << setw(11) << balance;







cout << endl;



}







// Summarize loan payments







cout << endl;



cout << "Total payments: " << paymentnum << endl;



cout << "Total paid: $" << setw(14) << totalpayment << endl;



cout << "Interest paid: $" << setw(14) << totalipaid << endl;



cout << "Principal paid: $" << setw(14) << totalppaid << endl;



}



error



C:\mydocuments.cpp(293) : error C2731: 'main' : function cannot be overloaded

Your function loan_schedule is written wrong. The function header requires parameters. While your function call and prototype have no parameters. I'm surprised it even compiles.

Future note also. If you post again put the code in bb tags and in a much more easy on the eyes form. Dont have two to four blank lines between similiar pieces of code.