Help with class, member functions and consructor

GrassPuppet · #1 04-Feb-2006, 16:12

Hello, I'm new here. I'm having trouble with an excersice program. I can't seem to implement a debit function that will deduct from the initial balance of an account, as well as a credit function.

It asks to create a class called Account. The class should include one data member of type int to represent the account balance. Your class should prode a construtor that recieves an initial balance and uses it to initialize the data member. It should also validate it that it's greater or equal to 0..

Okay, my problem is that it requres three member funcitons. Member function credit should add an amount to the current balance. Member function debit should withdraw money from the Account and should ensure that the debit amount does not exceed the Account's balance. Member funciton getBalance should return the current balance. Create a program that creates two Account objects and tests the member functios of class Account.

This is my code so far:

CPP / C++ / C Code:

#include <iostream>
#include <string>
#include <conio.h>

using namespace std;

class Account
{
   public:

      Account( int amount )
      {
         setBalance( amount );
      }
      
      void setBalance( int amount )
      {
         if ( amount >= 0 )
            Balance = amount;
         
         if ( amount < 0 )
         {
            Balance = 0;
            
            cout << "Your current balance is invalid.\n" << endl;
         }
      }
      void credit()
      {
        Balance = Balance + 20;
      }

      void debit()
      {
         Balance = Balance - 36;
         
         if ( Balance >= 0 )
            Balance = Balance;
         
         if ( Balance < 0 )
         {
            cout << "Debit amount exceeded account balance." << endl;
         }
      }
      
      int getBalance()
      {
         return Balance;
      }

   private:
      int Balance;
};

int main()
{
   Account accountBalance1( 10 );
   Account accountBalance2( 30 );

   cout << "The new balance for account 1 is: " << accountBalance1.getBalance()
        << "\n\nThe new balance for account 2 is: " << accountBalance2.getBalance()
        << endl;
   
   getch();
   return 0;
}

I hope I'm the right track. Thanks

davekw7x · #2 04-Feb-2006, 16:40

Quote:

Originally Posted by GrassPuppet

Hello, I'm new here. I'm having trouble with an excersice program. I can't seem to implement a debit function that will deduct from the initial balance of an account, as well as a credit function.
..

Okay, my problem is that it requres three member funcitons. Member function credit should add an amount to the current balance. Member function debit should withdraw money from the Account and should ensure that the debit amount does not exceed the Account's balance.
.
.
.
I hope I'm the right track.

The code looks good, as far as it goes. Thank you for using code tags. (How many times have I said that for a first post? --- Not many.)

Just give the debit() and credit() functions parameters (arguments). Then calculate the new balance as the balance - the argument (for debit()) or balance + the argument (for credit()). Assuming integers (which you are using everywhere):

CPP / C++ / C Code:

      void credit(int amount)
      {
        // put a statement here to
        // calculate the new balance by adding amount
      }

Then, in main(), to credit your account number 1 with, say, 100:

CPP / C++ / C Code:

    accountBalance1.credit(100);

Regards,

Dave

GrassPuppet · #3 04-Feb-2006, 17:34

Thanks for the help. It worked.

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Help with class, member functions and consructor

Re: Help with class, member functions and consructor

Re: Help with class, member functions and consructor