a little calculator

Question

anerchy 0 Newbie Poster

14 Years Ago

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication8
{
    public partial class Form1 : Form
    {
        double deger1;
        double deger2;
        char isaret;
        public Form1()
        {
            InitializeComponent();
          
        }

        private void button_1_Click(object sender, EventArgs e)
        {
            string a = ("1");
           textBox1.AppendText(a);

           
            
        }

        private void button_2_Click(object sender, EventArgs e)
        {
            string a = ("2");
            textBox1.AppendText(a);

        }

        private void button_3_Click(object sender, EventArgs e)
        {
            string a = ("3");
            textBox1.AppendText(a);

        }

        private void button_4_Click(object sender, EventArgs e)
        {
            string a = ("4");
            textBox1.AppendText(a);

        }

        private void button_5_Click(object sender, EventArgs e)
        {
            string a = ("5");
            textBox1.AppendText(a);

        }

        private void button_6_Click(object sender, EventArgs e)
        {
            string a = ("6");
            textBox1.AppendText(a);

        }

        private void button_7_Click(object sender, EventArgs e)
        {
            string a = ("7");
            textBox1.AppendText(a);

        }

        private void button_8_Click(object sender, EventArgs e)
        {
            string a = ("8");
            textBox1.AppendText(a);

        }

        private void button_9_Click(object sender, EventArgs e)
        {
            string a = ("9");
            textBox1.AppendText(a);

        }

        private void button_0_Click(object sender, EventArgs e)
        {
            string a = ("0");
            textBox1.AppendText(a);

        }

        private void button_comma_Click(object sender, EventArgs e)
        {
            string a = (".");
            textBox1.AppendText(a);

        }

        private void button_sqrt_Click(object sender, EventArgs e)
        {
           

       double  a=double.Parse(textBox1.Text);

       a = Math.Sqrt(a);

       textBox1.Text = a.ToString();
            

           

        }

        private void button_topla_Click(object sender, EventArgs e)
        {
            
          
            deger1 = double.Parse(textBox1.Text);
            textBox1.Clear();
            isaret = '+';
       
            
        }

        private void button_cikart_Click(object sender, EventArgs e)
        {
            string a = ("-");
            textBox1.AppendText(a);
            isaret = '-';

        }

        private void button_carp_Click(object sender, EventArgs e)
        {
            string a = ("*");
            textBox1.AppendText(a);
        }

        private void button_bol_Click(object sender, EventArgs e)
        {
            string a = ("/");
            textBox1.AppendText(a);
        }

        private void button_kalan_Click(object sender, EventArgs e)
        {
            string a = ("%");
            textBox1.AppendText(a);
        }

        private void button_square_Click(object sender, EventArgs e)
        {
           string a = ("^");
            textBox1.AppendText(a);
          
        }

        private void button_equalto_Click(object sender, EventArgs e)
        {

            deger2 = double.Parse(textBox1.Text);
            textBox1.Clear();

            double cevap = 0;
            string a;

            switch (isaret)
            {
                case '+':
                    cevap = deger1 + deger2;
                    break;
                case '-':
                    cevap = deger1 - deger2;
                    break;

            }

            cevap = deger2 + deger1;

            a=cevap.ToString();
            textBox1.Text(a);

            }

         

        }

        private void button_clear_Click(object sender, EventArgs e)
        {
            textBox1.Clear();
        }

      
    }
}

hello. first of all, its not a homework. just self-study.

so please can you help me to solve the button_equalto_Click(marked red) problem?

4 Contributors
6 Replies
244 Views
8 Hours Discussion Span
Latest Post 14 Years Ago Latest Post by nick.crane

Ketsuekiame 860 Master Poster

14 Years Ago

Hold on, I'll just use my magic telepathic powers to find out what errors you're getting and work out what the problem is....
*mentally strains*
Nope sorry couldn't do it. My magic has failed me :'(

nick.crane 342 Veteran Poster

14 Years Ago

I'm guessing that Error 1 is here textBox1.Text(a); This should be textBox1.Text = a; This will also clear the other error.

However, you will also get a run-time error here deger2 = double.Parse(textBox1.Text); because double does not parse mathematical expressions.
You will have to parse the sums yourself.

However, there are a couple of code samples on how to do this using CodeDom.
See [POST=1269042]this post[/POST] for the links.

Edited 14 Years Ago by nick.crane because: n/a

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anerchy 0 Newbie Poster · Answer 1 · 2010-07-08T17:17:05+00:00

Error 1 Non-invocable member 'System.Windows.Forms.Control.Text' cannot be used like a method.

Error 2 'System.Windows.Forms.TextBox.Text' is a 'property' but is used like a 'method'

arunkumars 14 Junior Poster · Answer 2 · 2010-07-08T18:22:26+00:00

it would be nice if you can give me the line ur error is indicating.

anerchy 0 Newbie Poster · Answer 3 · 2010-07-08T18:46:54+00:00

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication8
{
    public partial class Form1 : Form
    {
        double deger1;
        double deger2;
        char isaret;
        public Form1()
        {
            InitializeComponent();
          
        }

        private void button_1_Click(object sender, EventArgs e)
        {
            string a = ("1");
           textBox1.AppendText(a);

           
            
        }

        private void button_2_Click(object sender, EventArgs e)
        {
            string a = ("2");
            textBox1.AppendText(a);

        }

        private void button_3_Click(object sender, EventArgs e)
        {
            string a = ("3");
            textBox1.AppendText(a);

        }

        private void button_4_Click(object sender, EventArgs e)
        {
            string a = ("4");
            textBox1.AppendText(a);

        }

        private void button_5_Click(object sender, EventArgs e)
        {
            string a = ("5");
            textBox1.AppendText(a);

        }

        private void button_6_Click(object sender, EventArgs e)
        {
            string a = ("6");
            textBox1.AppendText(a);

        }

        private void button_7_Click(object sender, EventArgs e)
        {
            string a = ("7");
            textBox1.AppendText(a);

        }

        private void button_8_Click(object sender, EventArgs e)
        {
            string a = ("8");
            textBox1.AppendText(a);

        }

        private void button_9_Click(object sender, EventArgs e)
        {
            string a = ("9");
            textBox1.AppendText(a);

        }

        private void button_0_Click(object sender, EventArgs e)
        {
            string a = ("0");
            textBox1.AppendText(a);

        }

        private void button_comma_Click(object sender, EventArgs e)
        {
            string a = (",");
            textBox1.AppendText(a);

        }

        private void button_sqrt_Click(object sender, EventArgs e)
        {
           

       double  a=double.Parse(textBox1.Text);

       a = Math.Sqrt(a);

       textBox1.Text = a.ToString();
            

           

        }

        private void button_topla_Click(object sender, EventArgs e)
        {
            
          
            deger1 = double.Parse(textBox1.Text);
            textBox1.Clear();
            isaret = '+';
       
            
        }

        private void button_cikart_Click(object sender, EventArgs e)
        {

            deger1 = double.Parse(textBox1.Text);
            textBox1.Clear();
            isaret = '-';

        }

        private void button_carp_Click(object sender, EventArgs e)
        {
            deger1 = double.Parse(textBox1.Text);
            textBox1.Clear();
            isaret = '*';
        }

        private void button_bol_Click(object sender, EventArgs e)
        {
            deger1 = double.Parse(textBox1.Text);
            textBox1.Clear();
            isaret = '/';
        }

        private void button_kalan_Click(object sender, EventArgs e)
        {
            deger1 = double.Parse(textBox1.Text);
            textBox1.Clear();
            isaret = '%';
        }

        private void button_square_Click(object sender, EventArgs e)
        {
            deger1 = double.Parse(textBox1.Text);
            textBox1.Clear();
            isaret = '^';
          
        }

        private void button_equalto_Click(object sender, EventArgs e)
        {

            deger2 = double.Parse(textBox1.Text);
            textBox1.Clear();

            double cevap = 0;
            string a;

            switch (isaret)
            {
                case '+':
                    cevap = deger1 + deger2;
                    break;
                case '-':
                    cevap = deger1 - deger2;
                    break;
                case '*':
                    cevap = deger1 * deger2;
                    break;
                case '/':
                    cevap = deger1 / deger2;
                    break;
                case '%':
                    cevap = deger1 % deger2;
                    break;
                case '^':
                    cevap = (Math.Pow(deger1,deger2));
                    break;



            }

         

            a=cevap.ToString();
            textBox1.Text = a; 

         

        }

        private void button_clear_Click(object sender, EventArgs e)
        {
            textBox1.Clear();
        }

      
    }

}

thank you. it just works (fine for now :) )

nick.crane 342 Veteran Poster · Answer 4 · 2010-07-08T19:16:53+00:00

nick.crane 342 Veteran Poster

14 Years Ago

Your welcome.
Please mark solved.