代码如下：

var foodDemand = function (food)
    {
    console.log("I want to eat" +" "+ food);
    };
    console.log(foodDemand(food));

从你发的代码里是没看到food的定义   你food在哪定义了..

 console.log(foodDemand(food)) 改成这样 foodDemand("apple")

[ 本帖最后由 husiwen 于 2013-12-2 22:00 编辑 ]