本文实例为大家分享了jQuery实现可以计算进制转换的计算器,供大家参考,具体内容如下
在案例8的基础上增加了进制转换功能
动画效果:
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<!DOCTYPE html> < html lang = "en" > < head > < meta charset = "UTF-8" > < title >计算器</ title > < script src = "../jquery.min.js" ></ script > < style > *{ margin: 0; padding: 0; } #calculator{ position: relative; margin: 50px auto; padding: 5px; width: 230px; height: 316px; background: rgb(190,210,224); } #screen{ width: 230px; height: 60px; background: rgb(153,153,153); border-radius: 5px; text-align: right; overflow: hidden; } #txt1{ height: 20px; padding-top: 10px; font-size: 10px; } #txt2{ height: 30px; font-size: 20px; } #num{ float:left; width: 130px; } #num input{ width: 40px; height: 40px; margin-top: 3px; } #del{ float:right; width: 70px; height: 30px; } #del input{ margin-top: 4px ; width: 70px; height: 31px; } #operator{ margin-top: 5px ; float:right; width: 70px; height: 180px; } #operator input{ width: 70px; height: 31px; margin-top: 4px ; } #converter{ float:right; margin-top: 5px; width: 70px; } #converter .show{ position: absolute; bottom: 5px; width: 70px; height: 30px; font-size: 10px; } #converter div{ display: none; position: absolute; left: 150px; top: 100px; } #converter div input{ width: 85px; height: 25px; margin-top: 5px; } </ style > </ head > < body > < div id = "calculator" > < div id = "screen" > < p id = "txt1" ></ p > < p id = "txt2" ></ p > </ div > < div id = "workspace" > < div id = "num" > < input type = "button" value = "7" > < input type = "button" value = "8" > < input type = "button" value = "9" > < input type = "button" value = "4" > < input type = "button" value = "5" > < input type = "button" value = "6" > < input type = "button" value = "1" > < input type = "button" value = "2" > < input type = "button" value = "3" > < input type = "button" value = "Cle" > < input type = "button" value = "0" > < input type = "button" value = "." > < input type = "button" value = "A" > < input type = "button" value = "B" > < input type = "button" value = "C" > < input type = "button" value = "D" > < input type = "button" value = "E" > < input type = "button" value = "F" > </ div > < div id = "del" > < input type = "button" value = "←" > </ div > < div id = "operator" > < input type = "button" value = "+" > < input type = "button" value = "-" > < input type = "button" value = "*" > < input type = "button" value = "/" > < input type = "button" value = "=" > </ div > < div id = "converter" > < div > < input type = "button" value = "十转十六进制" name = "1" > < input type = "button" value = "十转八进制" name = "2" > < input type = "button" value = "十转二进制" name = "3" > < input type = "button" value = "十六转十进制" name = "4" > < input type = "button" value = "八转十进制" name = "5" > < input type = "button" value = "二转十进制" name = "6" > </ div > < input class = "show" type = "button" value = "进制转换" > </ div > </ div > </ div > < script > $(function(){ var i=0;//i为清空标志,i=1时需要清空#txt2的数据 //获取输入的数字 $("#num input").click(function () { //先判断#txt2中是否保存着上次计算的结果,如果是则将其清空 if (i===1){ $("#txt2").text(""); } //保证数字以正确的格式显示 //使用switch语句实现 switch ($(this).val()){ case "Cle": $("#txt2").text(""); break; case ".": if ($("#txt2").text().indexOf(".") != -1) { break; }else{$("#txt2").append($(this).val());} break; default: if ($("#txt2").text() === "0") { $("#txt2").text($(this).val()); }else{ $("#txt2").append($(this).val()); } } i=0;//将清空标志设为0 }); //获取运算符 $("#operator input:not(:last)").click(function () { $("#txt1").text($("#txt2").text()+$(this).val()); $("#txt2").text(""); }); //按下“=”键进行计算 $("#operator input").last().click(function () { //使用eval()函数 //$("#txt2").text(eval($("#txt1").text()+$("#txt2").text())); //使用常规方法 var str=$("#txt1").text(); var n1=parseFloat(str); var n2=parseFloat($("#txt2").text()); var cal=str[str.length-1]; switch (cal){ case "+": $("#txt2").text( n1+n2); break; case "-": $("#txt2").text( n1-n2); break; case "*": $("#txt2").text( n1*n2); break; case "/": $("#txt2").text( n1/n2); break; default: break; } $("#txt1").text( ""); i=1;//将清空标志设为1 }); //按下“←”回删数字 $("#del").click(function () { var str=$("#txt2").text(); if (i==0) { $("#txt2").text(str.slice(0, str.length - 1)); } }); //按下“进制转换”,出现几种进制转换按钮 $("#converter .show").click(function () { $("#converter div").toggle(); $("#operator").toggle(); }); //进行进制转换 $("#converter div input").click(function () { var index=this.name; var n=$("#txt2").text(); switch (index){ case "1": n=parseInt(n,10); $("#txt2").text(n.toString(16)); break; case "2": n=parseInt(n,10); $("#txt2").text(n.toString(8)); break; case "3": n=parseInt(n,10); $("#txt2").text(n.toString(2)); break; case "4": n=parseInt(n,16); $("#txt2").text(n.toString(10)); break; case "5": n=parseInt(n,8); $("#txt2").text(n.toString(10)); break; case "6": n=parseInt(n,2); $("#txt2").text(n.toString(10)); break; } i=1;//将清空标志设为1 }); }); </ script > </ body > </ html > |
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原文链接:https://blog.csdn.net/willard_cui/article/details/81592157