难道就我的结果一直循环循环嘛？还是说这就是答案...求运行结果页面啊
感觉代码也没错啊--
打伞的鱼_0003
2016-03-28
2 回答
function count(){
var a= document.getElementById("txt1").value;
var b = document.getElementById("txt2").value;
var c = document.getElementById("select").value;
var result = "";
switch(c) {
case "+":
result = parseFloat(a) + parseFloat(b);
break;
case "-":
result = parseFloat(a) - parseFloat(b);
break;
case "*":
result = parseFloat(a) * parseFloat(b);
break;
default:
result = parseFloat(a) / parseFloat(b);
}
document.getElementById("fruit").value = result;
}
你参考下吧
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