源自：6-11 编程练习
能不能这么写啊 会提示object ‘cclater’ unused
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>1</title>
<script type="text/javascript">
var cclater = {
a: parseInt(document.getElementById("txt1").value),
b: parseInt(document.getElementById("txt2").value),
sign: parseInt(document.getElementById("select").value),
operation: function () {
switch (this.sign) {
case "+":
return this.a + this.b;
case "-":
return this.a - this.b;
case "*":
return this.a * this.b;
case "/":
return this.a / this.b;
}
},
setvalue: function () {
document.getElementById("fruit").value = this.operation();
}
};
//获取第一个输入框的值
//获取第二个输入框的值
//获取选择框的值
//获取通过下拉框来选择的值来改变加减乘除的运算法则
//设置结果输入框的值
</script>
</head>
<body>
<input type='text' id='txt1'/>
<select id='select'>
<option value='+'>+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select>
<input type='text' id='txt2'/>
<input type='button' value=' = ' onclick="cclater.setvalue()"/> <!--通过 = 按钮来调用创建的函数，得到结果-->
<input type='text' id='fruit'/>
</body>
</html>
提问者：HC9
2016-11-17 23:16
个回答
-
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>1</title>
</head>
<body>
<input type='text' id='txt1' value="2"/>
<select id='select'>
<option value='+'>+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select>
<input type='text' id='txt2' value="2" />
<input type='button' value=' = ' onclick="cclater.setvalue()"/>
<input type='text' id='fruit'/>
<script type="text/javascript">
var cclater = {
a: parseInt(document.getElementById("txt1").value),
b: parseInt(document.getElementById("txt2").value),
sign: document.getElementById("select").value,
operation: function () {
switch (this.sign) {
case "+":
return this.a + this.b;
case "-":
return this.a - this.b;
case "*":
return this.a * this.b;
case "/":
return this.a / this.b;
default:
return 1;
}
},
update :function () {
this.a= parseInt(document.getElementById("txt1").value);
this.b= parseInt(document.getElementById("txt2").value);
this.sign= document.getElementById("select").value;
},
setvalue: function () {
this.update();
document.getElementById("fruit").value = this.operation();
}
};
//获取第一个输入框的值
//获取第二个输入框的值
//获取选择框的值
//获取通过下拉框来选择的值来改变加减乘除的运算法则
//设置结果输入框的值
</script>
</body>
</html>