I want to create a simple calculator...
I need one text box, and some buttons;
the user enter a number to textbox, and then when user press the + , user can write the second number, and when the user click the = the result will appear in same textbox...
How can I do that
What is the wrong with this code ||=>
string no1 = textBox1.Text;
textBox1.Text = " ";
string no2 = textBox1.Text;
double a = Convert.ToDouble(no1);
double b = Convert.ToDouble(no2);
textBox1.Text = c.ToString();
Calculator
rodmanovic
perhaps you need a double c = a + b; right after you declare and give a and b a value
Also you can use Double.Parse(no1); instead of Convert.ToDouble - going to trust that ToDouble does the same thing as parse, namely parse a string and convert it to its numerical equivalent.
Also you get a value from textBox1 - clear the value - and then get the second value from the SAME textbox. shouldn't it be textBox2.Text
LAPIS
If you want to use the same text box, then you need to store a cumulative total every time someone presses the +, and then add that number to the number in the next box the next time the user presses + or =.
class Calc
{
private double total = 0;
void OnPlusButton(object sender, EventArgs ea) // This needs to be hooked to the + event
{
double d =0;
if (double.TryParse(textBox1.Text, out d)
{
total += d;
}
textBox1.Text = d.ToString();
}
This will keep showing a total every time you press +, you may want to change it to show the total only when you press an = button.
CGS Krishna
hi,
this is a very advanced one but will help you so much
http://www.personalmicrocosms.com/html/cspcalc.html
best regards
zeynelabidin