C#•10mo ago

stack

This is the form of the question I wrote :

Write a program that reads n integers from the input, places them on a stack, then clears the numbers from the stack and outputs them.

! I want to keep this short and simple, without classes or objects. :vibin:
! But one more thing: use a question mark for the pop function, so that it doesn't throw an error when it returns null .

code :

class Program
{

private int n;
private int[] stack;
private int top = -1;
public Program(int size)
{
n = size;
stack = new int[n];
}

public void Push(int k)
{
if (top == n - 1)
{
Console.WriteLine("The stack is full.");
return;
}
stack[++top] = k;
}
public int Pop()
{
if (top == -1)
{
Console.WriteLine("The stack is empty.");
return -1;
}
return stack[top--];
}

static void Main()
{
Console.WriteLine("Enter the number of numbers:");
int n = int.Parse(Console.ReadLine());

Program p = new Program(n);

for (int i = 0; i < n; i++)
{
Console.Write($"عدد {i + 1}: ");
int num = int.Parse(Console.ReadLine());
p.Push(num);
}

Console.WriteLine("Numbers popped from the stack:");
while (p.top >= 0)
{
Console.WriteLine(p.Pop());
}
}
}

mg•3/8/25, 6:38 PM

continuing from https://discord.com/channels/143867839282020352/169726485865824256/1347995908192735282

MODiX•3/8/25, 6:38 PM

Ho3in

You're right, but I wrote this myself. I just wanted to see how an expert would answer this question.

Quoted by

@72080813948153856 from #database (click here)

React with ❌ to remove this embed.

•

3/8/25, 6:14 PM

mg•3/8/25, 6:38 PM

how would i do it? use a Stack<T>Stack<T> instead of writing the stack logic myself

mg•3/8/25, 6:39 PM

but that's probably not what your instructor would want you to do

Ho3inOP•3/8/25, 6:40 PM

Not by presenting

mg•3/8/25, 6:40 PM

I want to keep this short and simple, without classes or objects

not possible. C# is an object oriented language. ProgramProgram is a class

mg•3/8/25, 6:40 PM

typically you don't create instances of ProgramProgram

mg•3/8/25, 6:41 PM

the right way, without using the existing Stack<T>Stack<T> class, would be to write a StackStack class yourself to encapsulate the logic of creating the stack and pushing/popping

mg•3/8/25, 6:41 PM

then create an instance of that stack class, read each number and push it on the stack, and then pop them all off like you're doing

HHo3in Not by presenting

mg•3/8/25, 6:42 PM

i don't understand what you mean by this

Salman•3/8/25, 6:42 PM

maybe if you really wanna shorten it you could've used a List<T>List<T> as a stack would be a lil weird

Ho3inOP•3/8/25, 6:43 PM

Non, le but est le suivant : je veux simuler la pile en la présentant comme : int[] stack = new int[n];

mg•3/8/25, 6:43 PM

i don't speak french

SSalman maybe if you really wanna shorten it you could've used a `List<T>` as a stack wo...

mg•3/8/25, 6:44 PM

they need a stack

Ho3inOP•3/8/25, 6:44 PM

No, the goal is this: I want to simulate the stack by presenting it as: int[] stack = new int[n];

Salman•3/8/25, 6:44 PM

List<int> stack = new List<int>();

// Push items onto the stack
stack.Add(1);
stack.Add(2);
stack.Add(3);

// Pop items from the stack
while (stack.Count > 0)
{
    int item = stack[^1];
    stack.RemoveAt(stack.Count - 1);
    Console.WriteLine(item);  // Prints 3, 2, 1
}

List<int> stack = new List<int>();

// Push items onto the stack
stack.Add(1);
stack.Add(2);
stack.Add(3);

// Pop items from the stack
while (stack.Count > 0)
{
    int item = stack[^1];
    stack.RemoveAt(stack.Count - 1);
    Console.WriteLine(item);  // Prints 3, 2, 1
}

mg•3/8/25, 6:44 PM

you're not simulating a stack, you're implementing an actual stack

HHo3in No, the goal is this: I want to simulate the stack by presenting it as: int[] st...

Salman•3/8/25, 6:45 PM

are you allowed to use Lists or only arrays if you wanna simulate it ?

Ho3inOP•3/8/25, 6:45 PM

My teacher wrote with a presentation and said to start with a presentation.

SSalman ```cs List<int> stack = new List<int>(); // Push items onto the stack stack.Add...

mg•3/8/25, 6:45 PM

if they're using anything from System.Collections.GenericSystem.Collections.Generic they might as well be using Stack<T>Stack<T>, but i guess i'm making assumptions about what their instructor has made available

Salman•3/8/25, 6:45 PM

yeah instructions are unclear

HHo3in My teacher wrote with a presentation and said to start with a presentation.

mg•3/8/25, 6:46 PM

i think the language barrier is too big for me to be able to help, as i'm not understanding what you mean. sorry

Ho3inOP•3/8/25, 6:46 PM

thanks

HHo3in np

Salman•3/8/25, 6:46 PM

are you an Arab?

Salman•3/8/25, 6:47 PM

assumed that based on the print statement in your code

Pobiega•3/8/25, 6:47 PM

I'd say you should implement your own Stack<T>Stack<T> class based on an a T[]T[], with or without resizing.

SSalman assumed that based on the print statement in your code

Ho3inOP•3/8/25, 6:47 PM

im Persian iran

Salman•3/8/25, 6:47 PM

ah okay

Ho3inOP•3/8/25, 6:48 PM

I haven't learned enough in class yet, so I needed a presentation.

Pobiega•3/8/25, 6:48 PM

that doesnt mean anything in this context in english, I'm afraid

HHo3in I haven't learned enough in class yet, so I needed a presentation.

Salman•3/8/25, 6:49 PM

what do you mean by presentation here ?

Salman•3/8/25, 6:49 PM

like if you can elaborate further, then we could help you better

mg•3/8/25, 6:51 PM

maybe they mean it as in "appearance" i.e. the assignment is for them to write theyir own stack implementation

mg•3/8/25, 6:51 PM

would explain the use of "simulate" too

Salman•3/8/25, 6:52 PM

yeah ig

Ho3inOP•3/8/25, 6:53 PM

The question given by the teacher is as follows:

Question 1
Write a program that reads n integers from the input, then puts them on a stack, then clears the numbers in the stack and puts them on the output. By presenting

Something like this but this seems to be used with a class or advanced, for example, statics before defining variables I don't want to be

using System;

class Program
{
static int[] stack;
static int top = -1;
static int n;

// Push function to add an element to the stack
static void Push(int k)
{
if (top < n - 1)
{
stack[++top] = k;
}
else
{
Console.WriteLine("The stack is full.");
}
}

// Pop function to remove an element from the stack
static int? Pop()
{
if (top == -1)
{
Console.WriteLine("The stack is empty.");
return null; // Return null instead of throwing an error
}
return stack[top--];
}

static void Main()
{
Console.WriteLine("Enter the number of numbers:");
n = int.Parse(Console.ReadLine());

stack = new int[n];

// Pushing numbers onto the stack
for (int i = 0; i < n; i++)
{
Console.Write($"Enter number {i + 1}: ");
int num = int.Parse(Console.ReadLine());
Push(num);
}

// Popping numbers from the stack and displaying them
Console.WriteLine("Numbers popped from the stack:");
int? poppedNumber;
while ((poppedNumber = Pop()) != null)
{
Console.WriteLine(poppedNumber);
}
}
}

HHo3in The question given by the teacher is as follows: Question 1 Write a program tha...

Salman•3/8/25, 6:54 PM

Well if you dont want this then as mg said just use the Stack<T>Stack<T> and if something wrong ask your teacher for more clarification

Ho3inOP•3/8/25, 6:55 PM

What is this? Is it a class?

Salman•3/8/25, 6:56 PM

yes it's a predefined class

Salman•3/8/25, 6:56 PM

Stack<int> stack = new Stack<int>();

// Push items onto the stack
stack.Push(1);
stack.Push(2);
stack.Push(3);

// Pop items from the stack
while (stack.Count > 0)
{
    int item = stack.Pop();
    Console.WriteLine(item);  // Prints 3, 2, 1
}

Stack<int> stack = new Stack<int>();

// Push items onto the stack
stack.Push(1);
stack.Push(2);
stack.Push(3);

// Pop items from the stack
while (stack.Count > 0)
{
    int item = stack.Pop();
    Console.WriteLine(item);  // Prints 3, 2, 1
}

Salman•3/8/25, 6:56 PM

https://learn.microsoft.com/en-us/dotnet/api/system.collections.stack?view=net-9.0

Salman•3/8/25, 6:57 PM

Better explanation
https://www.programiz.com/csharp-programming/stack

Ho3inOP•3/8/25, 6:57 PM

The code I saw from my professor was like the one I sent, but it didn't use the class you mentioned, nor did it use these statics in the first variable, and it was a little simpler. You can

Salman•3/8/25, 6:58 PM

well without looking at your professor's code we can't compare that with anything

stack

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