VB newbie help, a calculator

To give you an idea, you mainly want to get tired of the value of "what" text2 when you click the button, then you can reuse the value in the label, that is, but assuming that the value of text1 is assigned first, it will be the result when the point is more than once, so you need to add a flag variable to identify whether it has been calculated once......Others think about it, the idea is almost like this, but the form can be changeable, the key is that the function of your ** is written independently The versatility is not enough, and it is slightly more to change**.

private lnumer1 as long,lnumer2 as long,lresult as long

private sub form_load()"Clear"

end sub

private sub text1_lostfoucs()lnumber1=val(

lresult=lnumber1

end sub

private sub text2_lostfoucs()lnumber2=val(

end sub

private sub command1_click()lresult=lresult + lnumber2= str$(lresult)

end sub

private sub command2_click()lresult=lresult - lnumber2= str$(lresult)

end sub

private sub command3_click()lresult=lresult / lnumber2= str$(lresult)

end sub

private sub command4_click()lresult=lresult * lnumber2= str$(lresult)

end sub

pirvate sub command5_click()"0"

lresult=0

end sub

Of course, this is not perfect, and it takes a lot of judgment to add talent, because you are a beginner, and you are just providing a method for your reference.

I also just learned, and the teacher in the sixth grade computer class said this:

private sub command1_click()= val( +val(

end sub

private sub command2_click()= val( -val(

end sub

private sub command3_click()= val( *val(

end sub

private sub command4_click()= val( / val(

end sub

private sub command5_click()= ""

end sub

private sub command6_click()endend sub

What you need to insert is:

Calculate the fix and cint parts of the function first, so it can be written as:

5\3/99*fix(

It means that the whole is out, and the priority of the operation is after *, and the division and multiplication should be calculated first, so:

4 * 6 mod 16 4 * 2 + 3) = 4 operator precedence is as follows: () > mod so the process is as follows:

ans=4 * 6 mod 16 / 4 * 5=24 mod 16 / 4 * 5

24 mod 4*5

24 mod 20=4

The operator priority (high to low) is as follows, and then push it yourself:

Exponential operations (

Negative numbers ( Multiplication and division (*)).

Integer division (

Modulo (mod

Addition and subtraction (+

String concatenation (&