求一个简单js计算器要求带上注释

一个人ღ 2024-11-29 06:35:13

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t;<title></title><style type="text/css">p .red .redl.blue </style><script language="j**ascript">var memory = 0;var number1 = "";var number2 = "";var newnumber = "blank";var opvalue = "";function d**play(d**playnumber) {document.calculator.answer.value = d**playnumber;}function memoryclear() {memory = 0;document.calculator.mem.value = "";}function memoryrecall(answer) {if(newnumber != "blank") {number2 += answer;} else {number1 = answer;}newnumber = "blank";d**play(answer);}function memorysubtract(answer) {memory = memory - eval(answer);}function memoryadd(answer) {memory = memory + eval(answer);document.calculator.mem.value = " m ";newnumber = "blank";}function clearcalc() {number1 = "";number2 = "";newnumber = "blank";d**play("");}function backspace(answer) {answerlength = answer.length;answer = answer.substring(0, answerlength - 1);if (number2 != "") {number2 = answer.tostring();d**play(number2);} else {number1 = answer.tostring();d**play(number1);}}function cecalc() {number2 = "";newnumber = "yes";d**play("");}function checknumber(answer) {if(answer == ".") {number = document.calculator.answer.value;if(number.indexof(".") != -1) {answer = "";}}if(newnumber == "yes") {number2 += answer;d**play(number2);}else {if(newnumber == "blank") {number1 = answer;number2 = "";newnumber = "no";}else {number1 += answer;}d**play(number1);}}function addbutton(x) {if(x == 1) equalbutton();if(number2 != "") {number1 = parsefloat(number1) + parsefloat(number2);}newnumber = "yes";opvalue = '+';d**play(number1);}function subbutton(x) {if(x == 1) equalbutton();if(number2 != "") {number1 = parsefloat(number1) - parsefloat(number2);}newnumber = "yes";opvalue = '-';d**play(number1);}function multbutton(x) {if(x == 1) equalbutton();if(number2 != "") {number1 = parsefloat(number1) * parsefloat(number2);}newnumber = "yes";opvalue = '*';d**play(number1);}function divbutton(x) {if(x == 1) equalbutton();if(number2 != "") {number1 = parsefloat(number1) / parsefloat(number2);}newnumber = "yes";opvalue = '/';d**play(number1);}function sqrtbutton() {number1 = math.sqrt(number1);newnumber = "blank";d**play(number1);}function percentbutton() {if(newnumber != "blank") {number2 *= .01;newnumber = "blank";d**play(number2);}}function recipbutton() {number1 = 1/number1;newnumber = "blank";d**play(number1);}function negatebutton() {number1 = parsefloat(-number1);newnumber = "no";d**play(number1);}function equalbutton() {if(opvalue == '+') addbutton(0);if(opvalue == '-') subbutton(0);if(opvalue == '*') multbutton(0);if(opvalue == '/') divbutton(0);number2 = "";opvalue = "";}</script></head><body><center><form name="calculator"><table bgcolor="#aaaaaa" width=230><tr><td><table bgcolor="#cccccc" border=1><tr><td><table border=0 cellpadding=0><tr><td bgcolor="#000080"></td></tr><tr><td><table width="100%" border=0><tr><td colspan=6><input type="text" readonly name="answer" size=30 maxlength=30 onchange="checknumber(th**.value)"></td></tr><tr><td colspan=6><table border=0 cellpadding=0><tr><td><input type="text" name="mem" size=3 maxlength=3 readonly style="background:menu"> <input type="button" name="backspace" class="redl" value="退格" onclick="backspace(document.calculator.answer.value); return false;"> <input type="button" name="ce" class="redl" value="ce" onclick="cecalc(); return false;"> <input type="reset" name="c" class="redl" value="c" onclick="clearcalc(); return false;"></td></tr></table></td></tr><tr><td><input type="button" name="mc" class="red" value=" mc " onclick="memoryclear(); return false;"></td><td><input type="button" name="calc7" class="blue" value=" 7 " onclick="checknumber('7'); return false;"></td><td><input type="button" name="calc8" class="blue" value=" 8 " onclick="checknumber('8'); return false;"></td><td><input type="button" name="calc9" class="blue" value=" 9 " onclick="checknumber('9'); return false;"></td><td><input type="button" name="divide" class="red" value=" / " onclick="divbutton(1); return false;"></td><td><input type="button" name="sqrt" class="blue" value="sqrt" onclick="sqrtbutton(); return false;"></td></tr><tr><td><input type="button" name="mr" class="red" value=" mr " onclick="memoryrecall(memory); return false;"></td><td><input type="button" name="calc4" class="blue" value=" 4 " onclick="checknumber('4'); return false;"></td><td><input type="button" name="calc5" class="blue" value=" 5 " onclick="checknumber('5'); return false;"></td><td><input type="button" name="calc6" class="blue" value=" 6 " onclick="checknumber('6'); return false;"></td><td><input type="button" name="multiply" class="red" value=" * " onclick="multbutton(1); return false;"></td><td><input type="button" name="percent" class="blue" value=" % " onclick="percentbutton(); return false;"></td></tr><tr><td><input type="button" name="ms" class="red" value=" ms " onclick="memorysubtract(document.calculator.answer.value); return false;"></td><td><input type="button" name="calc1" class="blue" value=" 1 " onclick="checknumber('1'); return false;"></td><td><input type="button" name="calc2" class="blue" value=" 2 " onclick="checknumber('2'); return false;"></td><td><input type="button" name="calc3" class="blue" value=" 3 " onclick="checknumber('3'); return false;"></td><td><input type="button" name="minus" class="red" value=" - " onclick="subbutton(1); return false;"></td><td><input type="button" name="recip" class="blue" value="1/x " onclick="recipbutton(); return false;"></td></tr><tr><td><input type="button" name="mplus" class="red" value=" m+ " onclick="memoryadd(document.calculator.answer.value); return false;"></td><td><input type="button" name="calc0" class="blue" value=" 0 " onclick="checknumber('0'); return false;"></td><td><input type="button" name="negate" class="blue" value="+/- " onclick="negatebutton(); return false;"></td><td><input type="button" name="dot" class="blue" value=" . " onclick="checknumber('.'); return false;"></td><td><input type="button" name="plus" class="red" value=" + " onclick="addbutton(1); return false;"></td><td><input type="button" name="equal" class="red" value=" = " onclick="equalbutton(); return false;"></td></tr></table></td></tr></table></td></tr></table></td></tr></table></form></center><script language=j**ascript>function keydown(){var icode=window.event.keycode;//alert(icode);if(event.shiftkey){switch(icode){case 56:document.all.multiply.click();break;case 59:document.all.minus.click();break;case 60:document.all.plus.click();break;}}if(!event.shiftkey&&!event.ctrlkey&&!event.altkey){switch (icode){case 8:document.all.backspace.click();break;case 187:document.all.equal.click();break;case 96:document.all.calc0.click();break;case 97:document.all.calc1.click();break;case 98:document.all.calc2.click();break;case 99:document.all.calc3.click();break;case 100:document.all.calc4.click();break;case 101:document.all.calc5.click();break;case 102:document.all.calc6.click();break;case 103:document.all.calc7.click();break;case 104:document.all.calc8.click();break;case 105:document.all.calc9.click();break;case 110:document.all.dot.click();break;case 13:document.all.equal.click();break;case 107:document.all.plus.click();break;case 109:document.all.minus.click();break;case 106:document.all.multiply.click();break;case 111:document.all.divide.click();break;case 48:document.all.calc0.click();break;case 49:document.all.calc1.click();break;case 50:document.all.calc2.click();break;case 51:document.all.calc3.click();break;case 52:document.all.calc4.click();break;case 53:document.all.calc5.click();break;case 54:document.all.calc6.click();break;case 55:document.all.calc7.click();break;case 56:document.all.calc8.click();break;case 57:document.all.calc9.click();break;case 190:document.all.dot.click();break;case 13:document.all.equal.click();break;case 191:document.all.divide.click();break;}}//event.keycode=0;//event.returnvalue=false;}window.document.attachevent("onkeydown",keydown)</script></body></html>这是当时我学生做的一个，分拿来....完全符合你的要求. 20210311

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求一个简单js计算器要求带上注释

房贷计算器-九子财经 | 备案号： 桂ICP备19010581号-1 商务联系 企鹅：2790-680461

房贷计算器-九子财经 | 备案号：桂ICP备19010581号-1 商务联系企鹅：2790-680461