Bugs in calculator

[kumarv75]

I have a question whnever I do any operation like 6*. or 5+. and so on I get a number formating execption and also I am able to enter values like 6.1.2.3. which should not come in a calculator another bug I face is values get append to the result say if I calculate 6+2 and press = gives 8 when I press a new avlue it gets appended to 8 like if I enter 5 then it comes as 85......Can u help me in this prob that I am facing :)

[nitinverma]

Check ur Code,
This is the logical error.
When u press new number u have to check the text box is empty or not. then proceed to next step.

[Norm]

Where else is this question posted? I've already answered the question there.