[PsychoCoder]

I'll be starting to work on Part 2 in the next couple days which will cover some of the items requested in this thread, so keep your eyes open (might take a few days due to work and such but will get it written)

[AnzeBarle]

I decided to make a graphical calculator (like one in Windows) for my seminary assigment. But, as a beginner, i don't know, how to start.

I must first form a graphic, and write a code. I found some instructions about the code, but non about graphic.

Can You help me?

[Core]

It woudld better for you to ask your question in the forums. This comment area is mainly for tutorial feedback.

[andtherus]

lesPaul456, on 17 June 2009 - 08:52 AM, said:

Irish18, on 16 Jun, 2009 - 08:40 AM, said:

papuccino1, on 15 Jun, 2009 - 03:15 PM, said:

Irish18, you probably DO NOT have a TextBox called "txtInput" on your form. Triple-check for that. I'm 999% percent sure that's the problem.

Gyargh, I found the name of my TextBox, it was called 'textBox1'; so i put that infront of '.Text' and its giving the same error message

This is what i have so far;

public class Program
	{
		// variables to hold operands
		private double valHolder1;
		private double valHolder2;
		
		// variable to hold temporary values
		private double tmpValue;

		// True if '.' is use else false
		private bool hasDecimal = false;
		private bool inputStatus = true;

		// variable to hold Operator
		private string calcFunc;
	   
		[STAThread]
		public void Main()
		{
			Application.EnableVisualStyles();
			Application.SetCompatibleTextRenderingDefault(false);
			Application.Run(new Form1());
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			//Check the inputStatus
			if (inputStatus)
			{
				//Its True
				//Append values to the value
				//in the input box
				textBox1.Text += button1.Text;
			}
			else
			{
				//Value is False
				//Set the value to the value of the button
				textBox1.Text = button1.Text;
				//Toggle inputStatus to True
				inputStatus = true;
			}
		}

In the code you pasted, the button1 click event looks like it's in the "Program" class. If that's right, then there's your problem. This method should be in the "Form1" class.

Anyone can tell me which program to use to open the .zip file in this example? I tried just about everything now...much appreciated!

Can you please tell me which program to use to open the .zip file (with the Calculator code)? I tried just about everything...

[PsychoCoder]

This is a very basic example of a calculator. It doesn't accept any key inputs, when I get around to a newer version it will contain that functionality but this one does not

[PsychoCoder]

Maybe you didn't see my last response to this statement:

Quote

This is a very basic example of a calculator. It doesn't accept any key inputs, when I get around to a newer version it will contain that functionality but this one does not

[Janitor]

I've created a simplified version, not as many IF statements and uses maths class...within a console application though!

main

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

namespace Calculator
{
    public class Program
    {
        double Value = 0;
        double Value2 = 0;
        double answer = 0;

        private static void Main(string[] args)
        {
            int userChoice = 0;

           do
           {
                Program display = new Program();

                display.displayOptions();
                display.menu(userChoice);

                Console.ReadLine();
                Console.Clear();

            } while (userChoice != 5);
        }

        private void displayOptions()
        {       
            Console.WriteLine();
            Console.WriteLine("Calculator");
            Console.WriteLine("------------");

            Console.Write("Enter a number: ");
            Value = double.Parse(Console.ReadLine());

            Console.Write("Please Enter another number: ");
            Value2 = double.Parse(Console.ReadLine());
            Console.WriteLine();
        }

        private void menu(int choice)
        {

            MathsFunctions sum = new MathsFunctions();

            Console.WriteLine("------------");
            Console.WriteLine("1 - Add");
            Console.WriteLine("2 - Multiply");
            Console.WriteLine("3 - Divide");
            Console.WriteLine("4 - Subtract");
            Console.WriteLine("5 - Exit");
            Console.WriteLine("------------");
            Console.Write("Please select a value 1 - 4: ");
            
            choice = int.Parse(Console.ReadLine());

                switch (choice)
                {
                    case 1:
                        answer = sum.add(Value, Value2);
                        Console.WriteLine();
                        Console.WriteLine(Value + " + " + Value2 + " = " + answer);
                        break;
                    case 2:
                        answer = sum.multiply(Value, Value2);
                        Console.WriteLine();
                        Console.WriteLine(Value + " * " + Value2 + " = " + answer);
                        break;
                    case 3:
                        answer = sum.divide(Value, Value2);
                        Console.WriteLine();
                        Console.WriteLine(Value + " / " + Value2 + " = " + answer);
                        break;
                    case 4:
                        answer = sum.subtract(Value, Value2);
                        Console.WriteLine();
                        Console.WriteLine(Value + " - " + Value2 + " = " + answer);
                        break;
                    case 5:
                        Environment.Exit(0);
                        break;
                    default:
                        break;
                }
        }
    }
}

mathsfunction.cs

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

namespace Calculator
{
    public class MathsFunctions
    {
        public double add(double x, double y)
        {
            return  x + y;
        }

        public double subtract(double x, double y)
        {
            return x - y;
        }

        public double multiply(double x, double y)
        {
            return x * y;
        }

        public double divide(double x, double y)
        {
            return x / y;
        }
    }
}

Doesn't yet include powers, and square-root, though would be easy to implement...

This post has been edited by Janitor: 19 January 2011 - 03:16 PM