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实例模拟科学计算器函数(as3.0)

文章类别:Flash AS编程 | 发表日期:2008-10-6 17:43:48


我在FormulaPaster的基础上,写了Calculator 计算器类,提供了模拟一个科学计算器所需的函数.

/**

* Calculator 计算器类

* Verson 1.0

* 2006.8.20

* Copyright CYJB

*///

/*

* 模拟科学计算器的功能

* 1.数据输入及计算(加(+),减(-),乘(*),除(/),乘(^),取模(%)).

* 2.支持正负数.

* 3.支持括号.

* 4.支持计算函数(平方,开方,幂运算,对数,三角函数).

* 5.支持科学记数法的转换

* 6.支持进制转换(2~36)

* 7.支持数字分组

* 8.支持数据暂存

* 9.支持统计计算

* 10.支持角度(degree),弧度(radian),梯度(grads)转换

*/

import mx.transitions.BroadcasterMX;

class Calculator {

private var _value:String = "0";

private var isgroup:Boolean = false;

private var data:Array;

private var datam:Object;

private var formula = [];

private var isnew:Number = 3;

private var _memory:Array;

private var _system:Number = 10;

private var units:Number = 0;

private var backets:Array;

private var lastData:Object;

private var _isE:Boolean = false;

static var __initBroadcaster = BroadcasterMX.initialize(Calculator.prototype, true);

public var addListener:Function;

public var removeListener:Function;

public var broadcastMessage:Function;

public var _listeners:Array; //事件监听

//构造函数

public function Calculator() {

this.backets = [];

this._memory = [];

this.lastData = {sign:"+", value:0};

this._listeners = [];

this.addListener(this);

}

private function broadMessage(s:String) {

this.broadcastMessage("onKeyDown", this, s);

this.broadcastMessage("onChange", this, "KeyChange");

} //基本功能

public function C() { //清除键

this._value = "0";

this.formula = [];

this.backets = [];

this.isnew = 3;

this.lastData = {sign:"+", value:0};

this.broadMessage("C");

}

public function CE() { //清空键

this._value = "0";

this.isnew = 3;

this.broadMessage("CE");

}

public function BackSpace() {

//BackSpace

if (this.isnew == 0) {

this._value = this._value.slice(0, -1);

if (this._value.length == 0) {

this._value = "0";

}

this.broadMessage("BackSpace");

}

}

public function numbers(n:String) { //输入数字

n = n.toUpperCase();

if (this.isnew) {

this._value = "";

}

this.isnew = 0; //判断输入的数字是否在数制范围内

var nc = n.charCodeAt(0);

if (this._system<=10) {

if (nc>=48 && nc<=47+this._system) {

this._value += n;

this.broadMessage(n);

}

} else if (this._system>10) {

if ((nc>=48 && nc<=57) || (nc>=65 && nc<=54+this._system)) {

this._value += n;

this.broadMessage(n);

}

}

}

public function dot() { //小数点

if (this._system == 10) {

if (this.isnew) {

_value = "0";

}

this.isnew = 0;

if (this._value.indexOf(".") == -1) {

this._value += ".";

}

this.broadMessage(".");

}

}

public function minuss() { //正负号

if (this._system == 10) {

if (this.isnew) {

this._value = "";

}

this.isnew = 0;

if (this._value.indexOf("-") == -1) {

this._value = "-"+this._value;

} else {

this._value = this._value.substr(1);

}

this.broadMessage("+/-");

}

}

public function operation(s:String) { //输入运算符

if (s == "+" || s == "-" || s == "*" || s == "/" || s == "%" || s == "^") {

if (this.isnew == 2) {

if (this.formula.length != 0) {

this.formula[this.formula.length-1] = s;

this.calculate();

}

} else {

if (this._system == 10) {

this.formula.push(this._value);

} else {

this.formula.push(this.parseInt2(this._value));

}

this.formula.push(s);

this.calculate();

}

this.lastData = {sign:s, value:"0"};

this.isnew = 2;

this.broadMessage(s);

}

}

public function leftBracket() { //左括弧

if (this.isnew != 3) {

if (this.isnew != 2) {

if (this._value != "0") {

this.formula.push(this._value);

}

this.formula.push("*");

}

this.backets.push(this.formula);

}

this.formula = [];

this._value = "0";

this.lastData = {sign:"+", value:"0"};

this.isnew = 2;

this.broadMessage("(");

}

public function rightBracket() { //右括弧

if (this.isnew == 2) {

this.formula.pop();

} else if (this.isnew != 3) {

this.formula.push(this._value);

}

this.calculate(false);

if (this.backets.length != 0) {

this.formula = this.backets.pop();

this.formula.push(this._value);

this.formula.push("*");

}

this.lastData = {sign:"+", value:"0"};

this.isnew = 2;

this.broadMessage(")");

}

public function get hasBacket():Boolean {

return (this.backets.length != 0);

}

public function get backetNum():Number {

return this.backets.length;

}

public function equal() { // =

if (this.lastData.value != "0") {

if (this._system == 10) {

this.formula.push(this._value);

} else {

this.formula.push(this.parseInt2(this._value));

}

this.formula.push(this.lastData.sign);

this.formula.push(this.lastData.value);

this.calculate(false);

} else {

this.lastData.value = this._value;

if (this.isnew == 2) {

if (this.formula.length != 0) {

this.formula.pop();

this.calculate(true);

}

} else {

if (this._system == 10) {

this.formula.push(this._value);

} else {

this.formula.push(this.parseInt2(this._value));

}

this.calculate(true);

}

}

this.isnew = 3;

this.broadMessage("=");

}

private function calculate(isbacket:Boolean) { //计算数据

 

if (isbacket == undefined) {

while (getPriority(this.formula[this.formula.length-1])<=getPriority(this.formula[this.formula.length-3])) {

var s2 = this.formula.pop();

var n2 = this.formula.pop();

var s1 = this.formula.pop();

var n1 = this.formula.pop();

this.formula.push(this.evals(n1, s1, n2));

this.formula.push(s2);

}

if (this._system == 10) {

this._value = this.formula[this.formula.length-2];

} else {

this._value = this.parseInt2(this.formula[this.formula.length-2], 10, this._system);

}

} else {

while (this.formula.length>1) {

var n2 = this.formula.pop();

var s = this.formula.pop();

var n1 = this.formula.pop();

this.formula.push(this.evals(n1, s, n2));

}

if (this._system == 10) {

this._value = this.formula[0];

} else {

this._value = this.parseInt2(this.formula[0], 10, this._system);

}

if (isbacket) {

while (this.backets.length>=1) {

this.formula = this.backets.pop();

this.formula.push(this._value);

while (this.formula.length>1) {

var n2 = this.formula.pop();

var s = this.formula.pop();

var n1 = this.formula.pop();

this.formula.push(this.evals(n1, s, n2));

if (this._system == 10) {

this._value = this.formula[0];

} else {

this._value = this.parseInt2(this.formula[0], 10, this._system);

}

}

}

}

this.formula = [];

}

}

private function getPriority(s:String):Number { //计算权值

if (s == "+" || s == "-") {

return 1;

} else if (s == "*" || s == "/" || s == "%") {

return 2;

} else if (s == "^") {

return 3;

} else {

return 0;

}

}

private function evals(n1:String, s:String, n2:String):String { //计算数据

switch (s) {

case "+" :

return String(Number(n1)+Number(n2));

case "-" :

return String(Number(n1)-Number(n2));

case "*" :

return String(Number(n1)*Number(n2));

case "/" :

return String(Number(n1)/Number(n2));

case "%" :

return String(Number(n1)%Number(n2));

case "^" :

return String(Math.pow(Number(n1), Number(n2)));

}

}

private function parseInt2(s:String, from:Number, to:Number):String { //进制转换

if (from == undefined) {

from = this._system;

}

if (to == undefined) {

to = 10;

}

return parseInt(s, from).toString(to).toUpperCase();

} //其他功能

public function percent() { //百分比

if (this._system == 10) {

this.formula.push((Number(_value)/100).toString());

this.isnew = 1;

this.broadMessage("percent");

}

}

public function int() { //取整

if (_system == 10) {

_value = Math.floor(Number(_value)).toString();

this.broadMessage("int");

}

}

public function aint() { //显示小数部分

if (_system == 10) {

_value = (Number(_value)-Math.floor(Number(_value))).toString();

this.broadMessage("aint");

}

}

public function sqrt() { //开方

if (this._system == 10) {

this._value = Math.sqrt(Number(this._value)).toString();

} else {

this._value = Math.sqrt(parseInt(this._value, this._system)).toString(this._system).toUpperCase();

}

this.isnew = 1;

this.broadMessage("sqrt");

}

public function pow3() {

//x^3

if (this._system == 10) {

this._value = Math.pow(Number(this._value), 3).toString().toUpperCase();

} else {

this._value = Math.pow(parseInt(this._value, this._system), 3).toString(this._system).toUpperCase();

}

this.isnew = 1;

this.broadMessage("x^3");

}

public function pow2() {

//x^2

if (this._system == 10) {

this._value = Math.pow(Number(this._value), 2).toString().toUpperCase();

} else {

this._value = Math.pow(parseInt(this._value, this._system), 2).toString(this._system).toUpperCase();

}

this.isnew = 1;

this.broadMessage("x^2");

}

public function reciprocal() {

// 1/x

if (this._system == 10) {

this._value = (1/Number(this._value)).toString().toUpperCase();

}

this.isnew = 1;

this.broadMessage("1/x");

}

public function factorial() { // 阶乘

var num:Number = 1;

var max = parseInt2(this._value);

for (var i = 1; i<=max; i++) {

num *= i;

}

this._value = num.toString(this._system);

this.isnew = 1;

this.broadMessage("n!");

} //三角函数

public function sin() {

if (_system == 10) {

if (units == 1) {

this._value = this.dtr(Number(this._value));

} else if (units == 2) {

this._value = this.dtr(Number(this._value)*9/10);

}

this._value = Math.sin(Number(this._value)).toString();

this.isnew = 1;

this.broadMessage("sin");

}

}

public function cos() {

if (_system == 10) {

if (units == 1) {

this._value = this.dtr(Number(this._value));

} else if (units == 2) {

this._value = this.dtr(Number(this._value)*9/10);

}

this._value = Math.cos(Number(this._value)).toString();

this.isnew = 1;

this.broadMessage("cos");

}

}

public function tan() {

if (_system == 10) {

if (units == 1) {

this._value = this.dtr(Number(this._value));

} else if (units == 2) {

this._value = this.dtr(Number(this._value)*9/10);

}

this._value = Math.tan(Number(this._value)).toString();

this.isnew = 1;

this.broadMessage("tan");

}

} //反三角函数

public function asin() {

if (_system == 10) {

if (units == 1) {

this._value = this.dtr(Number(this._value));

} else if (units == 2) {

this._value = this.dtr(Number(this._value)*9/10);

}

this._value = Math.asin(Number(this._value)).toString();

this.isnew = 1;

this.broadMessage("asin");

}

}

public function acos() {

if (_system == 10) {

if (units == 1) {

this._value = this.dtr(Number(this._value));

} else if (units == 2) {

this._value = this.dtr(Number(this._value)*9/10);

}

this._value = Math.acos(Number(this._value)).toString();

this.isnew = 1;

this.broadMessage("acos");

}

}

public function atan() {

if (_system == 10) {

if (units == 1) {

this._value = this.dtr(Number(this._value));

} else if (units == 2) {

this._value = this.dtr(Number(this._value)*9/10);

}

this._value = Math.atan(Number(this._value)).toString();

this.isnew = 1;

this.broadMessage("atan");

}

} //角度转化为弧度

private function dtr(angle:Number):String {

return String(angle*(Math.PI/180));

} //弧度转化为角度

private function rtd(angle:Number):String {

return String(angle*(180/Math.PI));

}

public function exp() { //计算e的x次方

if (this._system == 10) {

this._value = Math.exp(Number(this._value)).toString();

} else {

this._value = Math.exp(parseInt(this._value, this._system)).toString(this._system);

}

this.broadMessage("exp");

}

public function Exp() { //计算10的x次方

if (_system == 10) {

this._value = Math.pow(10, Number(this._value)).toString();

} else {

this._value = Math.pow(10, Number(parseInt2(this._value, this._system, 10))).toString(_system);

}

this.broadMessage("Exp");

}

public function ln() { //计算自然对数

if (this._system == 10) {

this._value = Math.log(Number(this._value)).toString();

} else {

this._value = Math.log(parseInt(this._value, this._system)).toString(this._system);

}

this.broadMessage("ln");

}

public function log() { //计算常用对数

 

if (this._system == 10) {

this._value = (Math.log(Number(this._value))/Math.LN10).toString();

} else {

this._value = (Math.log(parseInt(this._value, this._system))/Math.LN10).toString(this._system);

}

this.broadMessage("log");

}

public function PI() { //显示PI

if (_system == 10) {

this._value = String(Math.PI);

this.isnew = 1;

this.broadMessage("PI");

}

}

public function E() { //显示E

if (_system == 10) {

this._value = String(Math.E);

this.isnew = 1;

this.broadMessage("E");

}

}

public function dms() { //将数字化为度-分-秒

/*if (this._system == 10) {

var st = this._value.indexOf(".");

if (st != -1) {

var ss = (Number(this._value.substr(st+1))*60);

if (ss.length>2) {

ss = ss.substr(0, 2)+(Number(ss.substr(2))*60).toString();

}

this._value = this._value.slice(0, st)+"."+ss;

this.broadMessage("dms");

}

}*/

}

public function adms() { //将数字化为度

/*if (_system == 10) {

if ((st=_value.indexOf(".")) != -1) {

var s:Number = 0;

if (_value.length>=st+4) {

s = Number(_value.substr(st+3))/60;

while (s>10) {

s /= 10;

}

}

var f:Number = (Number(_value.substr(st+1, 2))+s)/60;

_value = (Math.floor(Number(_value))+f).toString();

//_value=Rtrim(_value,"0")

this.broadMessage("adms");

}

}*/

}

public function ChangetoE(s:String) {

return s; //化成科学记数法

/*if (n>=1) {

if (String(n).length<16) {

var nz = Math.floor(n);

var nx = String(n).slice(String(nz).length+1);

nx = Rtrim(nx, "0");

var ns = String(nz).split("");

var nsp = ns[0]+".";

for (var i = 1; i

if (nx == 0) {

if (ns[i] == 0) {

var del = true;

for (var j = i; j

if (!ns[i] == 0) {

del = false;

break;

}

}

if (del) {

break;

}

} else {

nsp += ns[i];

}

} else {

nsp += ns[i];

}

}

nsp = String(nsp);

nsp = Rtrim(nsp, "0");

if (nx == "") {

if (String(nsp).substr(-1, 1) == ".") {

nsp = String(nsp).slice(0, -1);

}

} else {

nx = String(nx);

nsp += Rtrim(nx, "0");

}

return String(nsp+"e+"+(ns.length-1));

} else {

return n;

}

} else {

if (n == 0) {

return "0e+0";

} else if (n>0.00001) {

var ns = String(n).split("");

var nt = 0;

for (var i = 2; i

if (Number(ns[i]) == 0) {

nt++;

} else {

break;

}

}

var nz = String(n).substr(nt+2, 1);

var nx = String(n).substr(nt+3);

if (nx != "") {

return String(nz+"."+nx+"e-"+(nt+1));

} else {

return String(nz+"e-"+(nt+1));

}

} else {

return n;

}

}*/

}

public function ChangetoF(s:String) {

return s; //化成普通数

/*var ns = String(n);

if (ns.indexOf("e") == -1) {

return n;

} else {

var nss = ns.split("e");

var nz = nss[0];

var nx = nss[1];

if (nz.indexOf(".") == -1) {

for (var i = 0; i

nz += "0";

}

} else {

var nzs = nz.split(".");

var nzz = nzs[0];

if (nzs[1].length<=Number(nx)) {

for (var i = 0; i<(Number(nx)-Number(nzs[1])); i++) {

nzz += "0";

}

nz = nzz;

}

return String(nz);

}

}*/

}

private function Rtrim(n:String, d:String) {

//ChangetoF和ChangetoE函数支持,删除字符串右边的指定字符

/*if (d == undefined) {

d = " ";

}

if (n.indexOf(d) != -1) {

var ss = n.split("");

var ssl = ss.length;

for (var i = ssl; i>=0; i--) {

if (ss[i] == d) {

if (i+1 == ss.length) {

ss.pop();

}

}

}

return ss.join("");

} else {

return n;

}*/

}

public function set group(b:Boolean) {

this.isgroup = b;

this.broadcastMessage("onChange", this, "GroupChange");

}

public function get group():Boolean {

return this.isgroup;

}

public function set FtoE(b:Boolean) {

this._isE = b;

this.broadcastMessage("onChange", this, "FtoEChange");

}

public function get FtoE():Boolean {

return this._isE;

}

public function get value():String {

return this._value;

}

public function get result():String { //数字输出

var re = this._value;

if (this._isE) {

if (this._system == 10) {

re = ChangetoE(re);

}

} else {

re = ChangetoF(re);

if (this.isgroup) {

if (_system == 10) {

var s = ",";

var n:Number = 3;

} else {

var s = " ";

var n:Number = 4;

}

if (re != "0") {

if (re.indexOf(".") != -1) {

var num = re.indexOf(".");

} else {

var num = re.length;

}

var i = num-n;

while (i>0) {

if (re.slice(0, i) != "-") {

re = re.slice(0, i).concat(s, re.slice(i));

}

i -= n;

}

}

}

}

return re;

} //数据暂存

public function MC(index:Number) { // 清除存储区的数字

if (index == undefined) {

this._memory = [];

} else {

this._memory.splice(index, 1);

}

this.isnew = 1;

this.broadMessage("MC");

}

public function MR(index:Number) { // 输出存储区的所有数字

if (_memory == undefined) {

_value = "0";

} else {

if (index == undefined) {

index = 0;

}

this._value = this._memory[index].toString(this._system);

}

isnew = 1;

this.broadMessage("MR");

}

public function MS(index:Number) { // 将数字储存在存储区

if (_value != "0") {

if (index == undefined) {

index = 0;

}

if (_system == 10) {

this._memory[index] = Number(this._value);

} else {

this._memory[index] = parseInt(this._value, this._system);

}

isnew = 1;

this.broadMessage("MS");

}

}

public function MP(index:Number) { // 将存储区的数字与以有数字相加

if (_value != "0") {

if (index == undefined) {

index = 0;

}

if (_system == 10) {

this._memory[index] += Number(this._value);

} else {

this._memory[index] += parseInt(this._value, this._system);

}

isnew = 1;

this.broadMessage("M+");

}

}

public function get memory():Array {

return this._memory;

}

public function get hasMemory():Boolean {

return (this._memory.length != 0);

}

public function set system(n:Number) {

if (n>=2 && n<=36) {

this._system = n;

this.broadcastMessage("onChange", this, "SystemChange");

}

}

public function get system():Number {

return this._system;

}

public function set unit(n:Number) {

if (n == 1) {

this.units = 1;

} else if (n == 0) {

this.units = 0;

} else if (n == 2) {

this.units = 2;

}

this.broadcastMessage("onChange", this, "UnitChange");

}

public function get unit():Number {

return this.units;

} //统计计算

public function Sta() { //进入,退出统计模式

if (data == undefined) {

this.data = [];

} else {

this.data = undefined;

}

this.datam = {Ave:undefined, Ave2:undefined, Sum:undefined, Sum2:undefined, S:undefined, S2:undefined};

this.isnew = 1;

this.broadMessage("Sta");

}

private function getSum() { //求数据和

//Sum=x1+x2+x3+...+xn

var num:Number = 0;

for (var i in this.data) {

num += this.data[i];

}

this.datam.Sum = num;

}

private function getSum2() { //求数据平方和

//Sum=x1*x1+x2*x2+x3*x3+...+xn*xn

var num:Number = 0;

for (var i in this.data) {

num += this.data[i]*this.data[i];

}

this.datam.Sum2 = num;

}

public function Ave() { //求平均值

 

//Ave=(x1+x2+x3+...+xn)/xn

if (data != undefined) {

if (this.datam.Ave != undefined) {

this._value = this.datam.Ave.toString(this._system);

} else {

if (this.datam.Sum == undefined) {

this.getSum();

}

this.datam.Ave = this.datam.Sum/this.data.length;

this._value = this.datam.Ave.toString(this._system);

}

this.isnew = 1;

this.broadMessage("Ave");

}

}

public function Ave2() { //求均方值

//Ave2=Sum2/n

if (this.data != undefined) {

if (this.datam.Ave2 != undefined) {

this._value = this.datam.Ave2.toString(this._system);

} else {

if (this.datam.Sum2 == undefined) {

this.getSum2();

}

this.datam.Ave2 = this.datam.Sum2/this.data.length;

this._value = this.datam.Ave2.toString(this._system);

}

this.isnew = 1;

this.broadMessage("Ave2");

}

}

public function Sum() { //求数据和

//Sum=x1+x2+x3+...+xn

if (data != undefined) {

if (this.datam.Sum != undefined) {

this._value = this.datam.Sum.toString(this._system);

} else {

this.getSum();

this._value = this.datam.Sum.toString(this._system);

}

this.isnew = 1;

this.broadMessage("Sum");

}

}

public function Sum2() { //求数据平方和

//Sum2=x1*x1+x2*x2+x3*x3+...+xn*xn

if (data != undefined) {

if (this.datam.Sum2 != undefined) {

this._value = this.datam.Sum2.toString(this._system);

} else {

this.getSum2();

this._value = this.datam.Sum2.toString(this._system);

}

this.isnew = 1;

this.broadMessage("Sum2");

}

}

public function S() { //求总体参数为n的标准差

//S=Math.sqrt((Sum2-n*Ave*Ave)/n)

if (data != undefined) {

if (this.datam.S != undefined) {

this._value = this.datam.S.toString(this._system);

} else {

if (this.datam.Ave == undefined) {

//计算Ave

if (this.datam.Sum == undefined) {

this.getSum();

}

this.datam.Ave = this.datam.Sum/this.data.length;

}

//计算Sum2

if (datam.Sum2 == undefined) {

this.getSum2();

}

//计算S

this.datam.S = Math.sqrt((this.datam.Sum2-this.data.length*this.datam.Ave*this.datam.Ave)/this.data.length);

this._value = this.datam.S.toString(this._system);

}

this.isnew = 1;

this.broadMessage("S");

}

}

public function S2() { //求总体参数为n-1的标准差

//S=Math.sqrt((Sum2-n*Ave*Ave)/(n-1))

if (data != undefined) {

if (this.datam.S2 != undefined) {

this._value = this.datam.S2.toString(this._system);

} else {

if (this.datam.Ave == undefined) {

//计算Ave

if (this.datam.Sum == undefined) {

this.getSum();

}

this.datam.Ave = this.datam.Sum/this.data.length;

}

//计算Sum2

if (datam.Sum2 == undefined) {

this.getSum2();

}

//计算S

this.datam.S2 = Math.sqrt((this.datam.Sum2-this.data.length*this.datam.Ave*this.datam.Ave)/(this.data.length-1));

this._value = this.datam.S2.toString(this._system);

}

this.isnew = 1;

this.broadMessage("S2");

}

}

public function Data() { //添加数据

if (this.data != undefined) {

if (this._system == 10) {

this.data.push(Number(_value));

} else {

this.data.push(parseInt(_value, _system));

}

this.datam = {Ave:undefined, Ave2:undefined, Sum:undefined, Sum2:undefined, S:undefined, S2:undefined};

this.isnew = 1;

this.broadMessage("Data");

}

}

public function load(n:Number) { //将数据显示在显示框中

if (this.data != undefined) {

this._value = this.data[n].toString(this._system);

this.isnew = 1;

this.broadMessage("load");

}

}

public function clear(n:Number) {

//清除数据 if (this.data != undefined) {

if (n == undefined) {

this.data.splice(n, 1);

} else {

this.data = [];

}

this.isnew = 1;

this.broadMessage("clear");

}

}

public function get hasData():Boolean {

return (this.data == undefined);

}

public function get n():Number {

return this.data.length;

}

}

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