| '********************************************************** |
| '* A simple four function calculator, written in VBScript * |
| '********************************************************** |
| |
| ' *** create a result window |
| Set result = createBean("java.awt.TextField", "0") |
| |
| ' *** create a panel of buttons |
| Set panel = createBean("java.awt.Panel") |
| panel.setLayout createBean("java.awt.GridLayout", 4, 4) |
| |
| buttons = "789*456/123-C0.+" |
| For i = 1 To len(buttons) |
| label = mid(buttons,i,1) |
| Set button = createBean("java.awt.Button", label) |
| panel.add button |
| |
| If InStr("*/-+", label) Then |
| button.onAction="op """ & label & """" |
| Elseif label="C" Then |
| button.onAction="mem=0 : nextOp=""+"" : result.text=""0""" |
| Else |
| button.onAction="press """ & label & """" |
| End If |
| Next |
| |
| ' *** Place everything in the frame |
| frame.title = "VBScript Calc" |
| frame.resize 130, 200 |
| frame.add "North", result |
| frame.add "Center", panel |
| frame.validate |
| |
| ' *** Initialize the state of the calculator |
| mem = 0 |
| nextOp = "+" |
| autoClear = True |
| |
| ' *** handle data entry keys |
| Sub press (key) |
| On Error Resume Next |
| If autoClear Then result.text="0" |
| If result.text="0" and key<>"." Then result.text = "" |
| If key="." and InStr(result.text,".") Then key="" |
| result.text = result.text & key |
| autoClear=False |
| End sub |
| |
| ' *** handle arithmetic keys |
| Sub op (key) |
| err=0 |
| On Error Resume Next |
| num = result.text+0 |
| If nextOp = "+" Then mem = mem + num |
| If nextOp = "-" Then mem = mem - num |
| If nextOp = "*" Then mem = mem * num |
| If nextOp = "/" Then mem = mem / num |
| nextOp = key |
| |
| result.text = "" & mem |
| If err>0 then result.text="ERROR" : mem=0 : nextOp="+" |
| autoClear=True |
| End sub |
