Placing and removing element on array trough object

Question

Hello,

Lets assume i have 2 methods 1 that places a element on the array and one that removes it.

    const int Max = 10;
    int[] table= new int[Max];

I would like to call it up like this:

s1.Place(5);  // 5 0 0 0 0 0 0 0 0 0 0
s1.Place(9);  // 5 9 0 0 0 0 0 0 0 0 0
s1.Remove(9); // 5 0 0 0 0 0 0 0 0 0 0

I would only like to use : using system for this.

The result i get right now when i run the program is s1 = "nameofprogram" "name of class object"
Normally i should get 0 0 0 0 0 0 0 0 0 0 to begin with.

Any ideas how i can exactly add or remove those elements on the array?

        public void Place(int g)
    {
        if (top == Max)
        {
            throw new Exception("Stack overflow...");
        }
        else
        {
            table[top] = g;
            top++;
        }

....

Best Regards.

EDIT:

Thanks to jon for the stringbuilder i finally get display of the values in the array. Although i am still not able to remove any elements from the array with calling up s1.remove for example

    class Stack: Object
{
    private int top;
    private int Value;

    const int Max = 5;
    int[] tabel = new int[Max];

    public void Push(int g)
    {
        if (top == Max)
        {
            throw new Exception("Stack overflow...");
        }
        else
        {
            tabel[top] = g;
            top++;
        }
    }/*Push*/

    public int Pop()
    {
        return Value; //??
    }


    public override string ToString()
    {
        StringBuilder builder = new StringBuilder();
        foreach (int value in tabel)
        {
            builder.Append(value);
            builder.Append(" ");
            builder.Append(top); // how to make this so it displays Top: .....value???

        }
        return builder.ToString();
    } 

}/*Stack*/

Above is the object class, beneath the driver where the program gets its values from.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;


namespace Stack
{
class ConsCode
{
    public void ExecuteProgram()
    {
        Console.Title = "StackDemo";
        Stack s1 = new Stack(), s2 = new Stack();
        ShowStack(s1, "s1");
        ShowStack(s2, "s2");
        Console.WriteLine();
        int getal = TryPop(s1);
        ShowStack(s1, "s1");
        TryPush(s2, 17);
        ShowStack(s2, "s2");
        TryPush(s2, -8);
        ShowStack(s2, "s2");
        TryPush(s2, 59);
        ShowStack(s2, "s2");
        Console.WriteLine();
        for (int i = 1; i <= 3; i++)
        {
            TryPush(s1, 2 * i);
            ShowStack(s1, "s1");
        }
        Console.WriteLine();
        for (int i = 1; i <= 3; i++)
        {
            TryPush(s2, i * i);
            ShowStack(s2, "s2");
        }
        Console.WriteLine();
        for (int i = 1; i <= 6; i++)
        {
            getal = TryPop(s2);
            //use number

            ShowStack(s2, "s2");
        }
    }/*ExecuteProgram*/


    private void TryPush(Stack s, int Value)
    {
        try
        {
            s.Push(Value);
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }
    }/*TryPush*/

    private int TryPop(Stack s)
    {
        try
        {
            return s.Pop();
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
            return 0;
        }
    }/*TryPop*/

    private void ShowStack(Stack s, string stackName)
    {
        Console.WriteLine("{0} = {1}", stackName, s);
    }/*ShowStack*/


}/*ConsCode*/

}

Answer 1

It sounds like you're just printing out the value of the instance of your class - if you want it to print out the contents of the array, you need to override ToString. For example:

public override string ToString()
{
    StringBuilder builder = new StringBuilder();
    foreach (int value in table)
    {
        builder.Append(value);
        builder.Append(" ");
    }
    builder.Length--; // Remove trailing space
    return builder.ToString();
}

Answer 2

You might be adding the elements to the array, but your output is wrong. In .net, if you perform Console.Write(myArray), .net will call Array.ToString() to get a string for the array. By default, this will return the name of the Array Type. Instead, you need to use a loop (foreach (int i in myArray) Console.Write(i); to output the contents.

When you have that, update your question with those details and we'll see if you still have a problem with your logic.

Answer 3

1. Why in gods name would you want to do this? We already have Stack and Queue implementations plus the incredible tool of Linq. Is this for a school project? You need to state explicitly if it is.

2. There is such a thing as a StackOverflowException already that you can use

3. I would make the Place and Remove methods extension methods on arrays.

   public static void Place(this T[] array, T obj) { //... }

Please let us know if this is part of a project before we progress any further

Answer 4

The reason you are getting s1 = "nameofprogram" "name of class object" is probably that somewhere in some code you have not shown you are outputting s1.ToString() or just plainly s1 with Console.WriteLine.

You can override ToString on your class and create a string with the numbers in it.