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html文件中引入js代碼
my.html
<html> <head> <script language="javascript" type="text/javascript" src=“myfuns.js"></scritp> <script language="javascript" type="/text/javascript"> var num1 = window.prompt('請輸入第一個數:'); var num2 = window.prompt("請輸入第2個數："); var operator = window.prompt("請輸入運算符"); num1 = parseFloat(num1); num2 = parseFloat(num2); document.write("res="+jiSuan(num1, num2, operator)); </script> </head> <body> </body> </html>
myfuns.js
//自定義函數，輸入兩個數，再輸入一個運算符，得到結果。 function jiSuan(num1, num2, operator){//強調：參數前，不要加var var res = 0; if (operator == "+"){ res = num1 + num2; }else if (operator == "-"){ res = num1 - num2; }else if (operator == "*"){ res = num1 * num2; }else{ res = num1 / num2; } return res;//返回 }
最後更新：2017-04-03 16:48:53