Javascript的switch中的case问题。

答案:5 悬赏:80

解决时间 2021-02-10 00:55

提问者网友：冰点阿弟
2021-02-09 07:11

最佳答案

二级知识专家网友：摧毁过往
2021-02-09 07:57

<html> <head> <title>switch statement</title> <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/> <script type="text/javascript"> //<![CDATA[ var stateCode='OR'; var statePercentage=0.0; var taxPercentage=0.0; switch(stateCode){ case'MO': taxPercentage=1.0; statePercentage=1.5; break; case "OR": case "MA": case "WI": taxPercentage=3.5; statePercentage=0.5; break; case'CA': case'NY': case'VT': statePercentage=2.6; taxPercentage=4.5; break; case'TX': taxPercentage=3.0; break; default: taxPercentage=2.0; statePercentage=2.3; } alert("tax is "+ taxPercentage +" and state is "+ statePercentage); //]]> </script> </head> <body> Imagine a form with options to pick state code </body> </html> 你改成这样试试 用这种方式 case "OR": case "MA": case "WI": 代替你的那个 case "OR","MA","WI" : 你的这种方式我没用过。。不知道管不管用。。

全部回答

1楼网友：转身→时光静好
2021-02-09 11:33

<html> <head> <title>switch statement</title> <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/> <script type="text/javascript"> //<![CDATA[ var stateCode='OR'; var statePercentage=0.0; var taxPercentage=0.0; switch(stateCode){ case'MO': taxPercentage=1.0; statePercentage=1.5; break; case "OR": case "MA": case "WI": taxPercentage=3.5; statePercentage=0.5; break; case'CA': case'NY': case'VT': statePercentage=2.6; taxPercentage=4.5; break; case'TX': taxPercentage=3.0; break; default: taxPercentage=2.0; statePercentage=2.3; } alert("tax is "+ taxPercentage +" and state is "+ statePercentage); //]]> </script> </head> <body> Imagine a form with options to pick state code </body> </html> 你改成这样试试 用这种方式 case "OR": case "MA": case "WI": 代替你的那个 case "OR","MA","WI" : 你的这种方式我没用过。。不知道管不管用。。

2楼网友：强势废物
2021-02-09 11:11

case "OR","MA","WI" : taxPercentage=3.5; statePercentage=0.5; break; 这样是不可以的，换成下面的 case "OR"： case "MA": case "WI" : taxPercentage=3.5; statePercentage=0.5; break;

3楼网友：不傲怎称霸
2021-02-09 10:40

var stateCode='OR'; var statePercentage=0.0; var taxPercentage=0.0; switch(stateCode){ case 'MO': taxPercentage=1.0; statePercentage=1.5; break; case 'OR': case 'MA': case 'WI': taxPercentage=3.5; statePercentage=0.5; break; case 'CA': case 'NY': case 'VT': statePercentage=2.6; taxPercentage=4.5; break; case 'TX': taxPercentage=3.0; break; default: taxPercentage=2.0; statePercentage=2.3; } alert("tax is "+ taxPercentage +" and state is "+ statePercentage);

4楼网友：青春如此荒謬
2021-02-09 09:10

你是用逗号分开了"OR","MA","WI"。逗号也是运算符，会返回最后一个值。 所以这个时候只有"WI"的时候会是3.5和0.5。 所以按标准的使用多个case吧。 var stateCode = 'OR'; var statePercentage = 0.0; var taxPercentage = 0.0; switch (stateCode) { case 'MO': taxPercentage = 1.0; statePercentage = 1.5; break; case "OR": case "MA": case "WI": taxPercentage = 3.5; statePercentage = 0.5; break; case 'CA': case 'NY': case 'VT': statePercentage = 2.6; taxPercentage = 4.5; break; case 'TX': taxPercentage = 3.0; break; default: taxPercentage = 2.0; statePercentage = 2.3; } alert("tax is " + taxPercentage + " and state is " + statePercentage);

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