本文实例为大家分享了jQuery实现计算器功能的具体代码,供大家参考,具体内容如下
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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{ margin: 50px auto; padding: 5px; width: 230px; height: 230px; 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; } #operator{ float:right; width: 70px; height: 170px; } #operator input{ width: 70px; height: 30px; margin-top: 4px ; } #converter{ float:right; width: 70px; height: 170px; } </ 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 = "C" > < input type = "button" value = "0" > < 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 > </ 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 "C": $("#txt2").text(""); break; case ".": if ($("#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()); } } //使用if语句实现 /* if ($(this).val()=="C"){ $("#txt2").text(" "); } else { if ($("#txt2").text().indexOf(".") != -1) { if ($(this).val() == ".") { } else { $("#txt2").append($(this).val()); } } else if ($("#txt2").text() === "0") { if ($(this).val() === ".") { $("#txt2").append($(this).val()); } else { $("#txt2").text($(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 }); }); </ script > </ body > </ html > |
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/willard_cui/article/details/81592013