<html>
<body>
<script language="javascript">
function Circle(radius){
this.r=radius;
}
Circle.PI=3.14159;
function Circle_area(){
return Circle.PI*this.r*this.r;
}
Circle.prototype.area = Circle_area;
Circle.max = new Function("a","b","return a.r>b.r?a:b");
new Circle(0);
var c =new Circle(1.0);
c.r = 2.2;
var a = c.area();
var x = Math.exp(Circle.PI);
var d = new Circle(1.2);
d.r = 2.0;
var bigger = Circle.max(c,d);
document.write("the area is "+a+" <br>");
document.write("x="+x);
</script>
</body>
</html>
No.2 var bigger(Circle.max(c,d)); 嘛意思?bigger是个函数吗?<script language="javascript">
function Circle(radius){
this.r=radius;
}
Circle.PI=3.14159;
function Circle_area(){
return Circle.PI*this.r*this.r;
}
new Circle(0);
Circle.prototype.area=Circle_area;
function Circle_max(a,b){
if(a.r>b.r)
return a;
else
return b;
}
Circle.max=Circle_max;
var c=new Circle(1.0);
c.r=2.2;
var a=c.area;
var x=Math.exp(Circle.PI);
var d=new Circle(1.2);
var bigger = Circle.max(c,d);
document.write("the area is "+a+" <br>");
document.write("x="+x);
</script>