I'm seeming to have some difficulties with a few things. I don't quite know how to get my program to add interest and charges to the balance, and I keep getting the message in Borland C++ Builder 6, "Unresolved external 'Interest(int)' referenced from C:\Documents and Settings......etc etc." and I'm also getting the same message for 'Charges(int)'. How do I fix that? Here my .cpp file and my .h file. Help would be greatly appreciated.
Contents of bank.cpp
--------------------------
#include <iostream>
#include <conio>
#include <iomanip>
#include <fstream>
#include <stdlib>
#include <dir>
#include "baccount.h"
using namespace std;
//These are all the functions used
void Deposit(int bal);
void Withdrawal(int bal);
void Balance(int bal);
void Interest(int bal);
void Charges(int bal);
void Menu();
void Exit();
//These are the variables used
int Dnum;
int bal;
char select;
int main(){
Menu();
return 0;
}
//The deposit function handles deposits coming into the program
void Deposit(){
clrscr();
cout << "\n\tEnter an amount: $";
cin >> Dnum;
Interest(bal);
Charges(bal);
ifstream balin("Bank.txt");
balin >> bal;
balin.close();
bal = bal + Dnum;
if(Dnum != 0){
ofstream Depo("Bank.txt");
Depo << bal;
Depo.close();
cout << "\n\tAmount deposited: $" << Dnum << endl;
cout << "\n\n\tYour balance is now: $" << bal << endl;
}
else
{
cout << "\n\tIncorrect amount, try again." << endl;
Menu();
}
cout << "\n\n\tPress any key to contine..." << endl;
Menu();
}
void Withdrawal(){
clrscr();
int Wnum;
cout << "\n\tEnter an amount: ";
cin >> Wnum;
Interest(bal);
Charges(bal);
if(Wnum != 0){
ifstream Without("Bank.txt");
Without >> bal;
Without.close();
bal = bal - Wnum;
if(bal < 0){
cout << "Your account can not be negative, please enter another amount." << endl;
Withdrawal();
}
ofstream Within("Bank.txt");
Within << bal;
Within.close();
}
cout << "\n\n\tAmount withdrawn: $" << Wnum;
cout << "\n\n\tYour balance is now: $" << bal;
cout << "\n\n\tPress any key to continue..." << endl;
Menu();
}
void Interest(){
clrscr();
int bal;
int annintrate = 0.6;
int monthlyint;
int monthlyintrate;
ifstream Balout("Bank.txt");
Balout >> bal;
Balout.close();
if(bal >= 25){
monthlyintrate = (annintrate/12);
monthlyint = bal * monthlyintrate;
bal = bal + monthlyint;
}
ofstream Balin("Bank.txt");
Balin << bal;
Balin.close();
cout << "\n\tYour current balance is: " << bal;
cout << "\n\nPress any key to continue..." << endl;
Menu();
}
void Charges(){
clrscr();
int withdraw;
int bal;
withdraw++;
bal = bal - (5 + 0.10);
if(withdraw >= 4)
{
withdraw++;
bal = bal - 1;
}
}
void Balance(){
clrscr();
int bal;
ifstream Balout("Bank.txt");
Balout >> bal;
Balout.close();
if(bal >= 25){
bal = bal;
}
ofstream Balin("Bank.txt");
Balin << bal;
Balin.close();
cout << "\n\tYour current balance is: " << bal;
cout << "\n\nPress any key to continue..." << endl;
Menu();
}
void Exit(){
cout << "\n\n\tEnd of program. Press any key to exit..." << endl;
}
void Menu(){
clrscr();
cout << "\t\t\tBank Account Project" << endl;
cout << "\t\t\t====================" << endl;
cout << "\n\n\t1) Make a Deposit" << endl;
cout << "\n\t2) Make a Withdrawal" << endl;
cout << "\n\t3) Check your Balance" << endl;
cout << "\n\t4) Quit" << endl;
cout << "\n\n\tEnter your selection: ";
cin >> select;
if(select == 1)
{
Deposit();
}
else if(select == 2)
{
Withdrawal();
}
else if(select == 3)
{
Balance();
}
else if(select == 4)
{
Exit();
}
getch();
}Contents of baccount.h
---------------------------
#include <string>
using namespace std;
class Account {
protected:
int bal;
int dep;
int with;
int interest;
int charges;
int balance;
int deposit;
int withdraw;
int calcInt;
int monthlyProc;
int monthlyint;
int monthlyintrate;
int annintrate;
public:
Balance() { return balance; }
NumDeposits() { return deposit; }
NumWithdrawals() { return withdraw; }
Interest()
{
if(bal >= 25)
monthlyintrate = (annintrate/12);
monthlyint = bal * monthlyintrate;
bal = bal + monthlyint;
return calcInt;
}
Charges()
{
if(withdraw >= 4)
{
withdraw++;
bal = bal - 1;
}
else
{
withdraw++;
bal = bal - (5 + 0.10);
}
return monthlyProc;
}
virtual void setBalance(int bal) { balance = bal; }
virtual void setNumDep(int dep) { deposit = dep; }
virtual void setNumWith(int with) { withdraw = with; }
virtual void setInt(int interest) { calcInt = interest; }
virtual void setCharges(int charges) { monthlyProc = charges; }
virtual int getBalance() { return balance; }
virtual int getNumDep() { return deposit; }
virtual int getNumWith() { return withdraw; }
virtual int getInt() { return calcInt; }
virtual int getCharges() { return monthlyProc; }
};
class Savings:public Account
{
private:
bool status;
int bal;
int monthlyintrate;
int annintrate;
int monthlyint;
public:
Savings()
{
if(balance >= 25)
status = true;
else
status = false;
}
Balance() { return balance; }
NumDeposits() { return deposit; }
NumWithdrawals() { return withdraw; }
Interest()
{
if(bal >= 25)
monthlyintrate = (annintrate/12);
monthlyint = bal * monthlyintrate;
bal = bal + monthlyint;
return calcInt;
}
Charges()
{
if(withdraw >= 4)
withdraw++;
bal = bal - 1;
return monthlyProc;
}
void setBalance(int bal) { balance = bal; }
void setNumDep(int dep) { deposit = dep; }
void setNumWith(int with) { withdraw = with; }
void setInt(int interest) { calcInt = interest; }
void setCharges(int charges) {monthlyProc = charges; }
int getBalance() { return balance; }
int getNumDep() { return deposit; }
int getNumWith() { return withdraw; }
int getInt() { return calcInt; }
int getCharges() { return monthlyProc; }
};
class Checking : public Account
{
private:
bool status;
int bal;
int monthlyintrate;
int annintrate;
int monthlyint;
public:
Checking()
{
if(balance >= 25)
status = true;
else
status = false;
}
Balance() { return balance; }
NumDeposits() { return deposit; }
NumWithdrawals() { return withdraw; }
Interest()
{
if(bal >= 25)
monthlyintrate = (annintrate/12);
monthlyint = bal * monthlyintrate;
bal = bal + monthlyint;
return calcInt;
}
Charges()
{
if(withdraw >= 4)
withdraw++;
balance = balance - (5 + 0.10);
monthlyProc = balance;
return monthlyProc;
}
void setBalance(int b) { balance = b; }
void setNumDep(int d) { deposit = d; }
void setNumWith(int w) { withdraw = w; }
void setInt(int i) { calcInt = i; }
void setCharges(int c) {monthlyProc = c; }
int getBalance() { return balance; }
int getNumDep() { return deposit; }
int getNumWith() { return withdraw; }
int getInt() { return calcInt; }
int getCharges() { return monthlyProc; }
};