// THIS IS MY CODE FOR CALCULATOR BUT I HAVE PROBLEM IT CANNOT PERCENTAGE AND SQRT PLEAS HELP ME

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

namespace MyCalculator
{
    public partial class calculator3 : Form
    {
        /******************=========================******************
         * creat bool for all btn(plus,minus,multiply,divid,and equal)
         * ********************and make it all false******************
         *****************==========================******************
         * */

        bool plus = false;
        bool minus = false;
        bool multiply = false;
        bool divid = false;
        bool equal = false;
        bool percentage = false;

        public calculator3()
        {
            InitializeComponent();
        }

        private void panel1_Paint(object sender, PaintEventArgs e)
        {

        }
        /****************==========================************
         *Now make if condition that:-xxxxxxxxxxxxxxxxxxxxxxxxz                       
         * if user hit the div,plus,multiply or divisin button 
         * veriable do some one for user as wish and it clear the 
         * Textbox for entry New value of calculation 
         * *************===========================************
         */

        private void btndivision_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                return;
            }
            else
            {
                divid = true;
                textBox1.Tag = textBox1.Text;
                textBox1.Text = "";


            }
        }

        private void btnmultiply_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                return;
            }
            else
            {
                multiply = true;
                textBox1.Tag = textBox1.Text;
                textBox1.Text = "";
            }
        }
        private void btnminus_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                return;
            }
            else
            {
                minus = true;
                textBox1.Tag = textBox1.Text;
                textBox1.Text = "";
            }
        }
        private void btnplus_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                return;
            }
            else
            {
                plus = true;
                textBox1.Tag = textBox1.Text;
                textBox1.Text = "";
            }



        }
        private void btnequal_Click(object sender, EventArgs e)
        {
            /*++++++++++++++++++xxxxxxxxxxxxxxxxxxxxxx++++++++++++++++++++++
             * This is Equal button code 
             * it work as below 
             * user hit 2 + 2 when the user hit = the code of plus will very
             *+++++++++++++++++xxxxxxxxxxxxxxxxxxxxxxx+++++++++++++++++++++++
             **/
            equal = true;

            if (plus)
            {
                decimal dec = Convert.ToDecimal(textBox1.Tag) + Convert.ToDecimal(textBox1.Text);
                textBox1.Text = dec.ToString();
            }
            if (multiply)
            {
                decimal dec = Convert.ToDecimal(textBox1.Tag) * Convert.ToDecimal(textBox1.Text);
                textBox1.Text = dec.ToString();
            }
            if (minus)
            {
                decimal dec = Convert.ToDecimal(textBox1.Tag) - Convert.ToDecimal(textBox1.Text);
                textBox1.Text = dec.ToString();
            }
            if (divid)
            {
                decimal dec = Convert.ToDecimal(textBox1.Tag) / Convert.ToDecimal(textBox1.Text);
                textBox1.Text = dec.ToString();
            }
             
            
        }

       
        
        private void button11_Click(object sender, EventArgs e)
        {
            checkifequal();
            textBox1.Text = textBox1.Text + "0";
        }

        private void button10_Click(object sender, EventArgs e)
        {

            checkifequal();
            textBox1.Text = textBox1.Text + "1";
        }
        /**
         * *****************======================*****************************
        ************ create own method for this code below***************
        if(equal)then textbox1.text = ""; 
        equal = false
        simply to creat method type   checkifequal()
        and when it show red error just right click it and click Generat method 
         ****************************=====================**********************
        */


        private void checkifequal()
        {
            if (equal)
            {
                textBox1.Text = "";
                equal = false;
            }
        }
        private void button14_Click(object sender, EventArgs e)
        {
            checkifequal();
            textBox1.Text = textBox1.Text + "2";
        }

        private void button18_Click(object sender, EventArgs e)
        {
            checkifequal();
            textBox1.Text = textBox1.Text + "3";
        }

        private void button9_Click(object sender, EventArgs e)
        {
            checkifequal();
            textBox1.Text = textBox1.Text + "4";
        }

        private void button13_Click(object sender, EventArgs e)
        {
            checkifequal();
            textBox1.Text = textBox1.Text + "5";
        }

        private void button19_Click(object sender, EventArgs e)
        {
            checkifequal();
            textBox1.Text = textBox1.Text + "6";
        }

        private void button8_Click(object sender, EventArgs e)
        {
            checkifequal();
            textBox1.Text = textBox1.Text + "7";
        }

        private void button12_Click(object sender, EventArgs e)
        {
            checkifequal();
            textBox1.Text = textBox1.Text + "8";
        }

        private void button16_Click(object sender, EventArgs e)
        {
            checkifequal();
            textBox1.Text = textBox1.Text + "9";
        }

        private void button2_Click(object sender, EventArgs e)
        {
            /* 
             * false all the veriable for make Textbox1 clear 
             **/

            plus = minus = multiply = divid = false;
            textBox1.Text = "";
            textBox1.Tag = "";
        }
        private void calculator3_Load(object sender, EventArgs e)
        {
            MaximizeBox = false;



        }
        private void button17_Click(object sender, EventArgs e)
        {
            checkifequal();
            textBox1.Text = textBox1.Text + ".";
        }

        private void BTNPERCENTAGE_Click(object sender, EventArgs e)
        {
        }
        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Close();

        }

        private void newCalcToolStripMenuItem_Click(object sender, EventArgs e)
        {

        }

        private void simpleCalculatorToolStripMenuItem_Click(object sender, EventArgs e)
        {
            BackColor = Color.LightGray;

        }

        private void scinToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Width = 260;

        }

        private void scientificToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Width = 398;

        }
        /*chang color of form and button for change color action
         * 
         */

        private void dynamicCalculatorToolStripMenuItem_Click(object sender, EventArgs e)
        {
            BackColor = Color.Gray;
            btn0.ForeColor = Color.Snow;
            btn1.ForeColor = Color.Snow;
            btn2.ForeColor = Color.Snow;
            btn3.ForeColor = Color.Snow;
            btn4.ForeColor = Color.Snow;
            btn5.ForeColor = Color.Snow;
            btn6.ForeColor = Color.Snow;
            btn7.ForeColor = Color.Snow;
            btn8.ForeColor = Color.Snow;
            btn9.ForeColor = Color.Snow;
            btndivision.ForeColor = Color.Snow;
            btndot.ForeColor = Color.Snow;
            btnhalf.ForeColor = Color.Snow;
            btnmultiply.ForeColor = Color.Snow;
            FunctionBtn.ForeColor = Color.Snow;
            btnplus.ForeColor = Color.Snow;
            btnsqrt.ForeColor = Color.Snow;
            button1.ForeColor = Color.Snow;
            label1.ForeColor = Color.Black;
            label1.BackColor = Color.Black;





        }

        private void btnsqrt_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                return;
            }
            else
            {
                percentage = true;
                textBox1.Tag = textBox1.Text;
                textBox1.Text = "";
            }


        }
    }
    }

Edited 5 Years Ago by __avd: Added [code] tags.

Comments
Use code blocks

Do not see what the problems are.
A percentage is what it says 1/100 of the value.
For Sqrt use Math.Sqrt function.
The decimal type is not the right type for doing this type of thing, use the double type. Decimal has 10^24 as maxvalue double has 10^308 as maximum.
The decimal type is always correct, that's why it is used in the banking bussiness, double can have some rounding errors.

Pleas checkout Red line and kindly send me percentage formula how can i declare in c#
please please i am very worried about this Please Sir

Did you look in the zip file in the thread I posted you, in the other thread you posted on the same subject?

I fact just what I said: percent comes from the Latin per centum meaning by hundred

Edited 5 Years Ago by ddanbe: n/a

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