//Hi all just switching from c++ to c#.Can anyone help,with the question i have:
//this is a peace of code from c++ banking aplication
int ShowMenu(void);
void AddAccount(vector<CAccount*>& list);
void DisplayAccount (vector<CAccount*>& list);
void Lodgement (vector<CAccount*>& list);
void Withdroawal (vector<CAccount*>& list);
void InterestRate (vector<CAccount*>& list);
CAccount* findAccount (vector<CAccount*>string );
bool quit = false;
int _tmain(int argc, _TCHAR* argv[])
{
vector<CAccount*> list;
int option = 0;
do{
quit =false;
option =ShowMenu();
switch ( option )
{
case 1:
AddAccount(list);
break;
case 2:
DisplayAccount(list);
break;
case 3:
Lodgement(list);
break;
case 4:
Withdroawal(list);
break;
case 5:
InterestRate(list);
break;
case 6:
quit = true;
break;
default:
cout << "Invalid Entry, Please Try Again";
}
}while(!quit);
return 0;
}
//How to change c++ vector to c# and what #include should be?Thank you.
Recommended Answers
Jump to PostIn C# you can think of all classes as references (pointers)
Like ddanbe said above, if you really want the pointer, you can use the
unsafekeyword and then use it like C++. A more safe way is to marshall it out into anIntPtrobject, but this is generally …
All 42 Replies
ddanbe 2,720
A List<T> in c# is the same as a vector<T> in C++.
cout would become Console.Write or WriteLine in C#.
I am also stuck on this line of code vector<CAccount*> list; How to make vector List<T> as you mentioned to be able to store pointer to base class?
ddanbe 2,720
If you have a CAccount class, you don't need a pointer to that class just use List<CAcount>. In C# you seldom use pointers. The compiler does it for you. You still can use pointers but then, you have to mark the code with the unsafe keyword.
Ketsuekiame 860
In C# you can think of all classes as references (pointers)
Like ddanbe said above, if you really want the pointer, you can use the unsafe keyword and then use it like C++. A more safe way is to marshall it out into an IntPtr object, but this is generally reserved for interop (Win32 API) code.
Given that your code looks to be self-contained you don't need the actual pointer reference.
Quick overview:
Nearly all objects are of two basic types; value and reference. A reference type can be treated almost identically to the pointer type in C++ and value types are the same as normal definitions and primitives (such as int, float, long CMyClass)
A quick easy rule as to whether something is a value type or reference type;
structs are value types and classes are reference types.
You can also say that anything that inherits Object is also a reference type but there are special rules around this too (such as boxing and unboxing).
To make it relevant to your code:
List<CAccount> list = new List<CAccount>(); in C# is the equivalent ofstd::vector<CAccount*> list; in C++
ddanbe
commented:
Could not have explained it better. +15
//How do i transfer this code in to c#:
#include "stdafx.h"
#include"Account.h"
#include"DepositAccount.h"
#include"CurrentAccount.h"
#include"CSSIAAccount.h"
using namespace std;
int ShowMenu(void);
void AddAccount(vector<CAccount*>& list);
void DisplayAccount (vector<CAccount*>& list);
void Lodgement (vector<CAccount*>& list);
void Withdroawal (vector<CAccount*>& list);
void InterestRate (vector<CAccount*>& list);
CAccount* findAccount (vector<CAccount*>string );
bool quit = false;
int _tmain(int argc, _TCHAR* argv[])
{
vector<CAccount*> list;
int option = 0;
do{
quit =false;
option =ShowMenu();
switch ( option )
{
case 1:
AddAccount(list);
break;
case 2:
DisplayAccount(list);
break;
case 3:
Lodgement(list);
break;
case 4:
Withdroawal(list);
break;
case 5:
InterestRate(list);
break;
case 6:
quit = true;
break;
default:
cout << "Invalid Entry, Please Try Again";
}
}while(!quit);
return 0;
}
int ShowMenu(void)
{
cout << " Welcome to account App" << endl;
int option;
cout << "\t\t1. Add New Account" << endl;
cout << "\t\t2. Show Account list" << endl;
cout << "\t\t3. Do Lodge" << endl;
cout << "\t\t4. Do Withdrawal" << endl;
cout << "\t\t5. Set Interest Rate" << endl;
cout << "\t\t6. Exit" << endl;
cout << "\n";
cout << "\t\tEnter Option Here: ";
cin >> option;
return option;
}
void AddAccount(vector<CAccount*>& list)
{
CAccount* ptr;
ptr = new CCurrentAccount ("ca1234", 100, 500);
list.push_back(ptr);
ptr = new CDepositAccount ("da1234", 500, 10);
list.push_back(ptr);
ptr = new CSSIAAccount ("sa1234", 100, 20);
list.push_back(ptr);
}
void DisplayAccount (vector<CAccount*>& list)
{
cout <<list.size() << endl;
CAccount* ptr;
for(int i = 0; i < list.size(); i ++)
{
ptr = list[i];
ptr-> ShowDetails();
}
}
CAccount* findAccount(vector<CAccount*>list, string idIn){
{
for (int i = 0 ; i < list.size(); i ++)
{
if (list[i]->GetID() == idIn)
return list[i];
}
}
return NULL;
}
void Lodgement (vector<CAccount*>& list)
{
string AccId;
CAccount* p =NULL;
float lodgementAmount =0;
cout << "Process Lodgement" << endl;
cout<< "Enter account ID:" << endl;
cin >> AccId;
cout << "Enter lodgement account =" << endl;
cin >> lodgementAmount;
///call method to return pointer on vector on vector that matches id
p = findAccount(list,AccId);
if ( p == NULL)
{
cout << "Error account can not be found" << endl;
}
else
{
p->Lodge(lodgementAmount);
cout << "new balance details "<< endl;
p->ShowDetails();
}
}
void Withdroawal (vector<CAccount*>& list)
{
string AccId;
CAccount* p =NULL;
float withDrawalAmount =0;
cout << "Process Withdraw" << endl;
cout<< "Enter account ID:" << endl;
cin >> AccId;
cout << "Enter withdrawal account =" << endl;
cin >> withDrawalAmount;
///call method to return pointer on vector on vector that matches id
p= findAccount(list,AccId);
if ( p == NULL)
{
cout << "Error account can not be found" << endl;
}
else
{
p->Withdraw(withDrawalAmount);
cout << "new balance details "<< endl;
p->ShowDetails();
}
}
void InterestRate (vector<CAccount*>& list)
{
for(int i =0;i <list.size();i++)
{
CDepositAccount *devptr = dynamic_cast<CDepositAccount*>(list[i]);
if(devptr != 0)
{
cout << "interest rate" << endl;
devptr->AddQtrInterest();
}
}
}
///I have so far this ,what i managed :
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace UseInheritance
{
class Program
{
static void Main(string[] args)
{
List<Account> list = new List<Account>();
bool quit = false;
SavingsAccount sa = new SavingsAccount("Freda Smith", 100.00, 25);
sa.Display();
//sa.Credit(100);
//sa.Debit(180);
//sa.ChangeName("Freda Jones");
//sa.Display();
//Console.WriteLine("Bank charge: ${0}",
//sa.CalculateBankCharge());
CurrentAccount ca = new CurrentAccount("ca1234", 200, 20);
list.Add(ca);
ca.Display();
DepositAccount da = new DepositAccount("da2345", 500, 10);
list.Add(da);
da.Display();
CSSIAAccount cssia = new CSSIAAccount("sa0023", 100, 20);
list.Add(cssia);
cssia.Display();
int option = 0;
do{
quit =false;
option = ShowMenu();
switch ( option )
{
case 1:
AddAccount(list);
break;
case 2:
DisplayAccount(list);
break;
case 3:
Lodgement(list);
break;
case 4:
Withdroawal(list);
break;
case 5:
InterestRate(list);
break;
case 6:
quit = true;
break;
default:
Console.WriteLine ("Invalid Entry, Please Try Again");
break;
}
}while(!quit);
}
public static int ShowMenu()
{
Console.WriteLine(" Welcome to account App");
int option;
Console.WriteLine("\t\t1. Add New Account");
Console.WriteLine("\t\t2. Show Account list");
Console.WriteLine("\t\t3. Do Lodge");
Console.WriteLine("\t\t4. Do Withdrawal");
Console.WriteLine("\t\t5. Set Interest Rate");
Console.WriteLine("\t\t6. Exit");
Console.WriteLine("\n");
Console.WriteLine("\t\tEnter Option Here: ");
option = (int)Console.Read();
return option;
}
public static void AddAccount(List<Account> list)
{
}
public static void DisplayAccount(List<Account> list)
{
}
public static void Lodgement(List<Account> list)
{ }
public static void Withdroawal(List<Account> list)
{ }
public static void InterestRate(List<Account> list)
{ }
}
}
//// the hard coded output works,but how do i fill in functions,like add Account //and those with the pointers convert to c#?
ddanbe 2,720
Perhaps you could specify everyting by function(method in C# talk) at the time. We (at least I) don't see all the things going on, please explain them.
Your AddAccount function seems rather easy this would be something like list.Add(AnAcount);
// function adAccount
public static void AddAccount(List<Account> list)
{
CurrentAccount ca = new CurrentAccount("ca1234", 200, 20);
list.Add(ca);
DepositAccount da = new DepositAccount("da2345", 500, 10);
list.Add(da);
CSSIAAccount cssia = new CSSIAAccount("sa0023", 100, 20);
list.Add(cssia);
}
///function display next,do i need to declare assignement again
CurrentAccount ca = new CurrentAccount("ca1234", 200, 20);
ca.Display();
//this Display in base class:
public virtual void Display()
{
Console.WriteLine("Name={0}, balance={1}",
this.name, this.balance);
}
//next functions like:
public static void Lodgement(List<Account> list)
{ }
public static void Withdroawal(List<Account> list)
{ }
public static void InterestRate(List<Account> list)
{
}
//No idea how to do,as in c# no pointers,classes works as a references ,but,i never came across with a syntax,like c++
//this is my first convertion from c++ to c#,that's why asking too many questions
//Whant to see how it works in c#, because syntax a bit different.Regards
ddanbe 2,720
On line 207 of your previous post you have List<Account> list = new List<Account>();
If CurrentAcount is another class you have to make a new List unless CurrentAcount is of type Account and you overloaded the consturtor in the Account class. Have to say goodnight now, see you in the morning. :)
ddanbe 2,720
Could you post the code of your account class please?
//Here is account class:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace UseInheritance
{
public abstract class Account
{
private string name;
protected double balance;
public string Name
{ get
{
return name;
}
set
{
name = value;
}
}
public double Balance
{
get {
return balance;
}
set
{
balance = value;
}
}
public Account(string nm, double bal)
{
this.name = nm;
this.balance = bal;
}
public virtual void Credit(double amount)
{
this.balance += amount;
}
public virtual void Debit(double amount)
{
this.balance -= amount;
}
public virtual void Display()
{
Console.WriteLine("Name={0}, balance={1}",
this.name, this.balance);
}
public void ChangeName(string newName)
{
this.name = newName;
}
//public virtual double CalculateBankCharge()
//{
//}
}
}
ddanbe 2,720
Let's concentrate on AddAcount for the moment.
You are creating 3 new classes there and add them to the Account list. In C# this won't work unless you use an ArrayList, but I would not recommend that.
Couldyou not turn these classes into an Account class also?
//Can you give me an example,please.To see how it works. And even to display all them,looks like need some kind of ref,but need to know how does it work in c#
/////This what i tried to do for addAccount:
SavingsAccount sa = new SavingsAccount("Freda Smith", 100.00, 25);
CurrentAccount ca = new CurrentAccount("ca1234", 200, 20);
list.Add(ca);
DepositAccount da = new DepositAccount("da2345", 500, 10);
list.Add(da);
CSSIAAccount cssia = new CSSIAAccount("sa0023", 100, 20);
list.Add(cssia);
// but if try to do display function,like :
public static void DisplayAccount(List<Account> list)
{
foreach (Account value in list)
{
Console.WriteLine("value");
}
}
//it doesn't work
ddanbe 2,720
OK if you consider it solved. But here is my first version of an account class.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Banking
{
enum AccountKind
{
CSSIAAccount, Deposit, whatever
}
class Account
{
public string name { get; set; }
public double balance { get; set; }
public AccountKind Kind { get; set; }
public Account(string name, double balance, AccountKind Kind)
{
this.name = name;
this.balance = balance;
this.Kind = Kind;
}
public virtual void Credit(double amount)
{
this.balance += amount;
}
public virtual void Debit(double amount)
{
this.balance -= amount;
}
public override string ToString()
{
return String.Format("Name = {0}, Balance = {1}",this.name, this.balance);
}
}
}
//Just somehow pressed solved,sorry
the Display stays the same?
public virtual void Display()
{
Console.WriteLine("Name={0}, balance={1}",
this.name, this.balance);
}
//This is my deposit acc,is it correct?
class DepositAccount:Account
{
protected double IntRate;
public double intRate
{
get
{
return IntRate;
}
set
{
IntRate = value;
}
}
public override void Display()
{
Console.WriteLine("Name={0}, balance={1}, balance={2}",
this.name, this.balance, this.IntRate);
}
public DepositAccount(string nm, double bal, double IRate)
: base(nm, bal)
{
IntRate = IRate;
}
public void AddQtrInterest()
{
balance += balance * IntRate / 100 / 4;
}
public override void Debit(double amount)
{
if (amount <= (balance ))
{
balance -= amount;
base.Debit(amount);
}
else
Console.WriteLine("Not allowed as amount exeeds balance\n");
}
}
}
ddanbe 2,720
You don't need the Display method (that is soo C++ I guess)
Because depositAccount is an Account you can use the ToString method of Account. You could remove my enum as you apparantly are going to derive other accounts from Account.
//Tahnks.Why when i try to do thid in depostAccount
class DepositAccount : Account
{
}
//it complains now for Account ,i change it to public abstract(the Account)to be it base
//In your example variables declared public,should i redefine the as protected?
Is it possible somehow to send you whole app,to check,what i got so far?
ddanbe 2,720
Could you send it in zip format?
Perhaps also include the C++ listing.
yes,i can,just need destination
//Here 2 copies,one from c++ to be converted to c#
can you see files,i uploaded 2,but can't see them
ddanbe 2,720
I see nothing. Did you clicked on the paperclip in thearea above the post?
Files