Flex计算器/入门

只是简单实现了一下计算。主要是练下手。
实现了鼠标跟键盘的事件响应。
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<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
width="198" height="224" fontSize="12" themeColor="#4D8853" borderColor="#B1C2CE" backgroundGradientAlphas="[1.0, 1.0]"
backgroundGradientColors="[#DFDCDC, #196722]"
applicationComplete="initApp();"
>
<mx:Script>
<!--[CDATA[
var one:int = 0; //第一个数
var two:int = 0; //第二个数
var jg:int = 0; //结果
var other = 0; //操作符0,没.1,+,2-,3*,4/
var sate:int = 1; //1是输入第一个数,2是第二个
//临时存储文本框中的数字

internal function but_1():void
{
sum.text += 1;
}
internal function but_2():void
{
sum.text += 2;
}
internal function but_3():void
{
sum.text += 3;
}
internal function but_4():void
{
sum.text += 4;
}
internal function but_5():void
{
sum.text += 5;
}
internal function but_6():void
{
sum.text += 6;
}
internal function but_7():void
{
sum.text += 7;
}
internal function but_8():void
{
sum.text += 8;
}
internal function but_9():void
{
sum.text += 9;
}
internal function but_0():void
{
sum.text += 0;
}

internal function but_deng():void
{
var str:String;
str = sum.text;
two = int(str);

switch(other)
{
case 1:
jg = one + two;
break;
case 2:
jg = one - two;
break;
case 3:
jg = one * two;
break;
case 4:
jg = one / two;
break;
}
sum.text = jg.toString();
}

internal function chongfu():void
{
var str:String;
str = sum.text;
if(sum.text != "" && sate == 1)
{
one = int(str);
}
else
{
two = int(str);
}
sate = 2;
sum.text = "";
}

internal f