Phiên bản đầy đủ: jsB@nk » Tính toán » Máy tính » Máy tính đơn giản
URL: https://www.javascriptbank.com/basic-calculator-3.html
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Phiên bản đầy đủ: jsB@nk » Tính toán » Máy tính » Máy tính đơn giản
URL: https://www.javascriptbank.com/basic-calculator-3.html
<SCRIPT LANGUAGE="JavaScript"><!-- Beginvar FKeyPad = document.Keypad;var Accum = 0;var FlagNewNum = false;var PendingOp = "";function NumPressed (Num) {if (FlagNewNum) {FKeyPad.ReadOut.value = Num;FlagNewNum = false; }else {if (FKeyPad.ReadOut.value == "0")FKeyPad.ReadOut.value = Num;elseFKeyPad.ReadOut.value += Num; }}function Operation (Op) {var Readout = FKeyPad.ReadOut.value;if (FlagNewNum && PendingOp != "=");else{FlagNewNum = true;if ( '+' == PendingOp )Accum += parseFloat(Readout);else if ( '-' == PendingOp )Accum -= parseFloat(Readout);else if ( '/' == PendingOp )Accum /= parseFloat(Readout);else if ( '*' == PendingOp )Accum *= parseFloat(Readout);elseAccum = parseFloat(Readout);FKeyPad.ReadOut.value = Accum;PendingOp = Op; }}function Decimal () {var curReadOut = FKeyPad.ReadOut.value;if (FlagNewNum) {curReadOut = "0.";FlagNewNum = false; }else{if (curReadOut.indexOf(".") == -1)curReadOut += "."; }FKeyPad.ReadOut.value = curReadOut;}function ClearEntry () {FKeyPad.ReadOut.value = "0";FlagNewNum = true;}function Clear () {Accum = 0;PendingOp = "";ClearEntry();}function Neg () {FKeyPad.ReadOut.value = parseFloat(FKeyPad.ReadOut.value) * -1;}function Percent () {FKeyPad.ReadOut.value = (parseFloat(FKeyPad.ReadOut.value) / 100) * parseFloat(Accum);}// End --></SCRIPT><!-- This script downloaded from www.JavaScriptBank.com Come to view and download over 2000+ free javascript at www.JavaScriptBank.com--><FORM name="Keypad" action=""><TABLE><B><TABLE border=2 width=50 height=60 cellpadding=1 cellspacing=5><TR><TD colspan=3 align=middle><input name="ReadOut" type="Text" size=24 value="0" width=100%></TD><TD></TD><TD><input name="btnClear" type="Button" value=" C " onclick="Clear()"></TD><TD><input name="btnClearEntry" type="Button" value=" CE " onclick="ClearEntry()"></TD></TR><TR><TD><input name="btnSeven" type="Button" value=" 7 " onclick="NumPressed(7)"></TD><TD><input name="btnEight" type="Button" value=" 8 " onclick="NumPressed(8)"></TD><TD><input name="btnNine" type="Button" value=" 9 " onclick="NumPressed(9)"></TD><TD></TD><TD><input name="btnNeg" type="Button" value=" +/- " onclick="Neg()"></TD><TD><input name="btnPercent" type="Button" value=" % " onclick="Percent()"></TD></TR><TR><TD><input name="btnFour" type="Button" value=" 4 " onclick="NumPressed(4)"></TD><TD><input name="btnFive" type="Button" value=" 5 " onclick="NumPressed(5)"></TD><TD><input name="btnSix" type="Button" value=" 6 " onclick="NumPressed(6)"></TD><TD></TD><TD align=middle><input name="btnPlus" type="Button" value=" + " onclick="Operation('+')"></TD><TD align=middle><input name="btnMinus" type="Button" value=" - " onclick="Operation('-')"></TD></TR><TR><TD><input name="btnOne" type="Button" value=" 1 " onclick="NumPressed(1)"></TD><TD><input name="btnTwo" type="Button" value=" 2 " onclick="NumPressed(2)"></TD><TD><input name="btnThree" type="Button" value=" 3 " onclick="NumPressed(3)"></TD><TD></TD><TD align=middle><input name="btnMultiply" type="Button" value=" * " onclick="Operation('*')"></TD><TD align=middle><input name="btnDivide" type="Button" value=" / " onclick="Operation('/')"></TD></TR><TR><TD><input name="btnZero" type="Button" value=" 0 " onclick="NumPressed(0)"></TD><TD><input name="btnDecimal" type="Button" value=" . " onclick="Decimal()"></TD><TD colspan=3></TD><TD><input name="btnEquals" type="Button" value=" = " onclick="Operation('=')"></TD></TR></TABLE></TABLE></B></FORM><!-- This script downloaded from www.JavaScriptBank.com Come to view and download over 2000+ free javascript at www.JavaScriptBank.com-->