c++ bank account array, looping through - c++

Question

I think I need to perform a multidimensional array or vector within it will define account and balance. Such as I defined {acctnum=44421, balance=0} by default the balance would be 0, and then I want to define another account {acctnum=55531, balance=""}. With each of these I need to take the first account with deposit and perform a withdrawal 10 then deposit 6. Then go to second deposit 3 and then deposit 5. Then display the intial deposit, then after withdrawal and after second deposit and what the account is after these actions.
header
#ifndef account_h_
#define account_h_
#include <iostream>
#include <string>
#include <account>
using std::account;
class account
{
public:
account();
account(const std::string acctnum);
~account();
//----------------------------------------------------
//account number
const std:string get_acctnum() const{
return m_acctnum;
}
//----------------------------------------------------
//deposit
void deposit(float amt){
m_balance += amt;
}
//----------------------------------------------------
//withdraw
void withdraw(float amt){
m_balance -= amt;
}
//----------------------------------------------------
//current balance
const double get_balance() const{
return m_balance;
})
//----------------------------------------------------
//display string
const std::string asString() const;
private:
//----------------------------------------------------
//account number
int m_acctnum;
//----------------------------------------------------
//balance
double m_balance;
//----------------------------------------------------
//after deposit or withdrawal
void inc(const double d) {
m_reading += d;
}
};
#endif
program
#include <iostream>
#include <string>
#include <stdlib.h>
#include "account.h"
using namespace std;
//----------------------------------------------------
//bank account default balance
account::account(){
m_balance = 0;
m_acctnum = "???";
}
account::account(const std::string acctnum){
m_balance = 0;
m_acctnum = acctnum;
}
account::~account(){
}
//----------------------------------------------------
//deposit
void account::deposit(double amount){
balance = balance + amount;
}
//----------------------------------------------------
//withdraw
void account::withdraw(double amount){
if(amount < balance ){
std::cout << "Debit amount exceeded account balance."
<< amount << endl;
}
else if(amount < 0){
std::cout <<"The withdrawel you've enter is defined as negative."
<< amount << endl;
}
else{
balance = balance - amount;
}
}
//----------------------------------------------------
//get balance
double account::get_balance() const{
return balance;
}
//----------------------------------------------------
//display
const std::string account::asstring() const{
ostringstream oss;
oss << "Account Num: " << m_acctnum <<
" Balance: " << m_balance;
return oss.str();
}
Test Program This is where I am having trouble in creating the program to do this. I think I need an array, maybe multidimensional array and access to the balance so I can perform deposits and withdrawals on??
#include <iostream>
#include <string>
#include "account.h"
void main(){
account::account[][2] = {
{44421, 20},
{55531, }
};
for (int row = 0; row < 2; ++row)
{
for (int col = 0; col < 2 ; ++col)
{
account::deposit[col]
}
}
}

Answer 1

You have multiple problems with your code.
//account number
int m_acctnum;
Your class member is an int.
const std:string get_acctnum() const{
return m_acctnum;
}
account::account(const std::string acctnum){
m_balance = 0;
m_acctnum = acctnum;
}
But your methods think it's a std::string. You cannot assign a std::string to an int. Similarly, you cannot convert an int directly to a std::string.
I'm sure your compiler reported all of these as errors. Did you understand your compiler's error messages? Here's a simple question, do you think that the following piece of code is valid:
int n="the rain in spain falls mainly in the plane";
Of course not, yet this is what you're trying to do, and, of course, the compiler can't be happy about it.
account::account[][2] = {
{44421, 20},
{55531, }
};
It's not clear what this is supposed to be, either. Each instance of an class is instantiated by either explicitly invoking the class's constructor, or using the class's default constructors; and then assigning it to a variable. Class instances are not instantiated by manually initializing private class members.
Your account class has a default constructor, and a constructor that takes one parameter. Your class does not have any constructors that take two parameters, so this is not a valid initialization.
Additionally, a class is constructed by giving the class's name, and the name of the class instance, and not by explicitly invoking the class's constructor.
account::deposit[col]
account::deposit() is a class method. It is not a static class function that can be invoked like that. Additionally, parameters to either a class method, or a static class functions are passed using parenthesis, not brackets.
Additionally, the deposit() method takes a parameter that's described as a "balance". It is not a "column number" type of a parameter.