Калькулятор на JavaScript - [6] :: Web-программирование

<html>
<head>
<meta http-equiv="Content-Language" content="ru">
<meta http-equiv="Content-Type" content="text/html; charset=windows-1251">
<title>Calculator46</title>
<script language="JavaScript">
function round(val)
{
return(Math.round(val*10000000)/10000000);
}

PI = 3.141592654;
function pie()
{
document.keypad.display.value = PI;
}

function MakeArray(n){
this.length=n;
for(var i=1; i<=n; i++) this[i]=0;
return this
}
link = new MakeArray(5);
function enter(num)
{
document.keypad.display.value += num;
}

function calculate(sign)
{
var temp = document.keypad.display.value * 1;
document.keypad.display.value = "";
document.keypad.list.value = temp;
link[1] = temp;

if (sign == "/") {link[2] = "/"; document.keypad.list.value += " / ";}
if (sign == "*") {link[2] = "*"; document.keypad.list.value += " * ";}
if (sign == "-") {link[2] = "-"; document.keypad.list.value += " - ";}
if (sign == "+") {link[2] = "+"; document.keypad.list.value += " + ";}
if (sign == "p") {link[2] = "p"; document.keypad.list.value += " ^ ";}
}

function power()
{
temp = 1;
n = link[3];
for(var i=1; i<=n; i++) temp *= link[1];
return(temp);
}

function equal()

{

if (link[2]) {

if (document.keypad.display.value != "") {

var temp = document.keypad.display.value * 1;

document.keypad.list.value += temp;

link[3] = temp;

if (link[2] == "/") {res = link[1] / link[3]; document.keypad.display.value = round(res)}

if (link[2] == "*") {res = link[1] * link[3]; document.keypad.display.value = round(res)}

if (link[2] == "-") {res = link[1] - link[3]; document.keypad.display.value = round(res)}

if (link[2] == "+") {res = link[1] + link[3]; document.keypad.display.value = round(res)}

if (link[2] == "p") {document.keypad.display.value = round( power() )}

link[1]=0; link[2]=0; link[3]=0;

}

}

}

function calc(code)

{

var temp = document.keypad.display.value * 1;

if (code == 1) {temp1 = Math.sin(temp*PI/180); document.keypad.list.value = "sin "}

if (code == 2) {temp1 = Math.cos(temp*PI/180); document.keypad.list.value = "cos "}

if (code == 3) {temp1 = Math.tan(temp*PI/180); document.keypad.list.value = "tan "}

if (code == 4) {temp1 = Math.sqrt(temp); document.keypad.list.value = "sqrt "}

if (code == 5) {temp1 = Math.log(temp); document.keypad.list.value = "ln "}

if (code == 6) {temp1 = 1/temp; document.keypad.list.value = "1/x, x="}

if (code == 7) {temp1 = temp * temp; document.keypad.list.value = "x*x, x="}

document.keypad.list.value += temp;

document.keypad.display.value = round(temp1);

}

function fsolve()

{

var a = document.keypad.c1.value*1;

var b = document.keypad.c2.value*1;

var c = document.keypad.c3.value*1;

if (a==0) {document.keypad.list.value = " НЕ КВАДРАТИЧНОЕ";

document.keypad.display.value = " УРАВНЕНИЕ"}

else { x1 = (b*b-4*a*c);

if ( x1 < 0) {document.keypad.list.value = " Мнимые корни";

temp = (Math.sqrt(Math.abs(x1)))/(2*a);

x2 = round(-b/(2*a)) + "+/- " + round(temp) + "i";

document.keypad.display.value = x2}

else {

var x1 = (-b + Math.sqrt(b*b-4*a*c)) / (2*a);

var x2 = (-b - Math.sqrt(b*b-4*a*c)) / (2*a);

document.keypad.list.value = "x1 = " + round(x1);

document.keypad.display.value = "x2 = " + round(x2);

}

}

}

function change()

{

var temp = document.keypad.display.value;

if (temp.substring(0,1) == "-") {document.keypad.list.value = "";

document.keypad.display.value = 0 - document.keypad.display.value * 1}

if (temp.substring(0,1) != "-") {document.keypad.list.value = "";

document.keypad.display.value = "-" + temp.substring(0,temp.length)}

}

function eraser()

{

document.keypad.list.value = " Начинайте считать!";

document.keypad.display.value = "";

document.keypad.c1.value = "";

document.keypad.c2.value = "";

document.keypad.c3.value = "";

link[1]=0; link[2]=0; link[3]=0;

}

function backer()

{

var temp = document.keypad.display.value;

document.keypad.display.value = temp.substring(0,temp.length*1 -1);

}

var memory = 0;

function mem(val)

{

if (val == 1 ) {document.keypad.list.value = " --> В память";

memory = document.keypad.display.value * 1}

if (val == -1) {document.keypad.display.value = memory}

if (val == 0 ) {document.keypad.list.value = " Стереть ПАМЯТЬ";

document.keypad.display.value = ""; memory = 0}

}

function message()

{

alert('\n\nСвои вопросы направляйте автору:\n\n ----> aag4@lehigh.edu <----');

}

function travel(link)

{

window.open(link,"calculator","toolbar=1,location=1,status=1,scrollbars=1,directories=1,copyhistory=1,menubar=1,resizable=1")

}

var screen=" ";

function eraser2()

{

var ans = confirm('\nВы действительно хотите удалить содержимое записной книжки?\n');

if (ans) {screen = document.notes.junk.value; document.notes.junk.value = "";}

}

function copy()

{

document.notes.junk.value = document.keypad.list.value+"\n"+document.keypad.display.value+"\n"+document.notes.junk.value;

}

function help()

{

screen = document.notes.junk.value;

msg1 = "Некоторые функции\nкалькулятора:\n";

msg2 = "\n(<-> M) - Сброс памяти\n(--> M) - Прибавить к ПАМЯТИ\n(<-- M) - Вычесть из ПАМЯТИ";

msg3 = "\n(<--) - Стереть последнюю цифру\n(x^y) - X в степени Y";

msg4 = "\n\nЧтобы вернуться, нажмите 'Восстановить'";

document.notes.junk.value = "";

document.notes.junk.value = msg1 + msg2 + msg3 + msg4;

}

function restore()

{

document.notes.junk.value = "";

document.notes.junk.value = screen;

}

</script>
</head>

<body bgcolor="#C0C0C0">
<p align="center">
<font size="3" color="#000000"><font color="#FF0000" size="5">Калькулятор
с записной книжкой</font><b><font size="4" color="#FF0000"><br>
</font>Удобен при различных расчетах с
необходимостью видеть (помнить) все
результаты.</b><BR>
<CENTER>(код скопируйте из источника)<table border=0 width="100%"><tr><td valign=middle align=center rowspan=2>

<form name="keypad"><CENTER><table border=6 cellspacing=2 cellpadding=3>

<tr><td valign=middle align=center colspan=9 bgcolor="yellow">

<FONT SIZE=4 COLOR="#800040"><I><B>WEB</B></I></FONT>

<FONT SIZE=6 COLOR="#800040"><I><B>.Sci-CALCulator</B></I></FONT></td></tr>

<tr><td valign=middle align=center colspan=6><input type="text" name="list" size=22 value=" Начинайте считать!">

</td><td valign=middle align=center colspan=3>

<input type="button" name="alex" value=" СБРОС " onClick="eraser()"></td></tr>

<tr><td valign=middle align=center colspan=6><input type="text" name="display" size=22 value=""></td>

<td valign=middle align=center colspan=2>

<input type="button" name="alex" value=" = " onClick="equal()"></td>

<td valign=middle align=center><input type="button" name="alex" value=" <-- " onClick="backer()"></td></tr>

<tr><td valign=middle align=center><input type="button" name="alex" value=" 1 " onClick="enter(1)"></td>

<td valign=middle align=center><input type="button" name="alex" value=" 2 " onClick="enter(2)"></td>

<td valign=middle align=center><input type="button" name="alex" value=" 3 " onClick="enter(3)"></td>

<td></td>

<td valign=middle align=center><input type="button" name="alex" value=" / " onClick="calculate('/')"></td>

<td></td>

<td valign=middle align=center><input type="button" name="alex" value=" sin " onClick="calc(1)"></td>

<td valign=middle align=center><input type="button" name="alex" value=" x½ " onClick="calc(4)"></td>

<td valign=middle align=center><input type="button" name="alex" value="<->M" onClick="mem(0)"></td></tr>

<tr><td valign=middle align=center><input type="button" name="alex" value=" 4 " onClick="enter(4)"></td>

<td valign=middle align=center><input type="button" name="alex" value=" 5 " onClick="enter(5)"></td>

<td valign=middle align=center><input type="button" name="alex" value=" 6 " onClick="enter(6)"></td>

<td></td>

<td valign=middle align=center><input type="button" name="alex" value=" * " onClick="calculate('*')"></td>

<td></td>

<td valign=middle align=center><input type="button" name="alex" value="cos" onClick="calc(2)"></td>

<td valign=middle align=center><input type="button" name="alex" value=" x² " onClick="calc(7)"></td>

<td valign=middle align=center><input type="button" name="alex" value="--> M" onClick="mem(1)"></td></tr>

<tr><td valign=middle align=center><input type="button" name="alex" value=" 7 " onClick="enter(7)"></td>

<td valign=middle align=center><input type="button" name="alex" value=" 8 " onClick="enter(8)"></td>

<td valign=middle align=center><input type="button" name="alex" value=" 9 " onClick="enter(9)"></td>

<td></td>

<td valign=middle align=center><input type="button" name="alex" value=" - " onClick="calculate('-')"></td>

<td></td>

<td valign=middle align=center><input type="button" name="alex" value="tan " onClick="calc(3)"></td>

<td valign=middle align=center><input type="button" name="alex" value="1/x " onClick="calc(6)"></td>

<td valign=middle align=center><input type="button" name="alex" value="<-- M" onClick="mem(-1)"></td></tr>

<tr><td valign=middle align=center><input type="button" name="alex" value=" 0 " onClick="enter(0)"></td>

<td valign=middle align=center><input type="button" name="alex" value=" . " onClick="enter('.')"></td>

<td valign=middle align=center><input type="button" name="alex" value=" +|- " onClick="change()"></td>

<td></td>

<td valign=middle align=center><input type="button" name="alex" value=" + " onClick="calculate('+')"></td>

<td></td>

<td valign=middle align=center><input type="button" name="alex" value=" pi " onClick="pie()"></td>

<td valign=middle align=center><input type="button" name="alex" value=" Ln " onClick="calc(5)"></td>

<td valign=middle align=center><input type="button" name="alex" value=" x^y " onClick="calculate('p')"></td></tr>

<tr><td valign=middle align=center colspan=9>Квадратичное
уровнение</td></tr><tr><td valign=middle align=center colspan=9>

<B><input type="text" name="c1" size=4 value=""> *X² + 

<input type="text" name="c2" size=4 value=""> *X + 

<input type="text" name="c3" size=4 value=""> = 0  <input type="button" name="alex" value="Решить" onClick="fsolve()"></B>

</td></tr>

</table></CENTER></form>

</td><td valign=middle align=center>

</font>
<font size="6" color="#800040"><i><b>Записная Книжка</b></i></font>
<font size="3" color="#000000">
</font>
</td></tr>

<tr><td valign=middle align=center>

<form name="notes"><TEXTAREA NAME="junk" ROWS=10 COLS=40 WRAP=virtual></TEXTAREA><BR><input type="button" name="alex" value="Поместить в записную книжку" onClick="copy()"><BR>

<input type="button" name="alex" style="width:190" value="Очистить записную книжку" onClick="eraser2()">     
<input type="button" name="alex" style="width:110" value="Восстановить!" onClick="restore()"><BR><input type="button" name="alex" value="Помощь" onClick="help()">     
<input type="button" name="alex" value="Еще помощь?" onClick="message()"><BR>

  

</td></tr></form></table></CENTER>
</body>
</html>

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