subtraction coding in calculator

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hi everyone!!!
i want to do the coding for multisubtraction using equal sign at the last in the calculator..
eg.3-2-1=
please help me out to do this..

Posted 17-Jul-13 19:59pm

shipra goyal

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Comments

midnight_ 18-Jul-13 2:07am

do you mean typing this in a textbox and the equal sign calucates the result?
more information would help.

shipra goyal 18-Jul-13 2:52am

using mouse numeric buttons are clicked and as soon as we click on equal btn result will be shown..i m able to perform 3-2= but not 4-3-2=.. in this it is only taking 3-2 that is last minus sign..

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 18-Jul-13 2:20am

What have you tried?

shipra goyal 18-Jul-13 2:55am

minus = true;
plus = false;
mul = false;
div = false;
a =Convert.ToDouble(displaytxtbox.Text);
in equal btn,i write this code..
if (minus)
{
b =a-Convert.ToDouble(displaytxtbox.Text);
displaytxtbox.Text = Convert.ToString(b);
a = 0;

}

i m able to perform 3-2= but not 4-3-2=.. in this it is only taking 3-2 that is last minus sign..

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 18-Jul-13 3:42am

Have you referred any article or this is your own code?
If you have referred an article, then provide the link. Else paste all your code.

3 solutions

Solution 2

Calculator[^]

Posted 17-Jul-13 20:13pm

berrymaria

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Sergey Alexandrovich Kryukov · Accepted Answer · 2013-07-17T20:08:00

Solution 1

All you need is JavaScript eval(): http://www.w3schools.com/jsref/jsref_eval.asp[^].

Got the hint?

—SA

Posted 17-Jul-13 20:08pm

Sergey Alexandrovich Kryukov

shipra goyal · Accepted Answer · 2013-07-18T20:10:00

C#

private void minusbtn_Click(object sender, EventArgs e)
       {
           minus = true;
           plus = false;
           mul = false;
           div = false;
           if (a == 0)
           {
               a = Convert.ToDouble(displaytxtbox.Text);
           }
           else
           {
               a = a - Convert.ToDouble(displaytxtbox.Text);
           }
           showtxtbox.Text = showtxtbox.Text + displaytxtbox.Text + "-";
           displaytxtbox.Text = "";

when equal btn pressed,coding is...

C#

if (minus)
           {
               b =a-Convert.ToDouble(displaytxtbox.Text);
               displaytxtbox.Text = Convert.ToString(b);
               a = 0;

           }