<html> <head> <meta charset="utf-8" /> <title></title> <script type="text/javascript">???????? function Person(name,age,gender){???????????? this.name = name;???????????? this.age = age;???????????? this.gender = gender;????????? } ????????var per = new Person("孫悟空",16,"男");???????? per.toString = function(){???????????? return "Person[name="+this.name+",age= "+this.age+",gender="+this.gender+"]"???????????? return "Person[name=孫悟空,age= 18,gender=男]"???????? }???????? console.log("per="+per);???????? </script>???????? </head>???????? <body> </body></html>問題一:為什么上面的變量this.name要加雙引號,而且前后還加了兩個+號?問題二:為什么孫悟空這幾個漢字作為字符串來說不能加引號?
為什么變量要加雙引號,而且前后還要加+號?
慕碼人0004322
2017-12-28 18:49:40
