//通过数组存储数据
        var zs = ['张三','男',160,160]
        console.log("name:"+zs[0]);
        //通过对象object存储数据
        var ls = {"name":"李四","age":18}
        //数组与对象相组合存储数据，对象作为数组的元素。
        var infos = [
            {"name":"李四一","age":21},
            {"name":"李四二","age":34},
            {"name":"李四三","age":55}
        ]
        console.log("李四一的信息：name:"+infos[0].name+",age:"+infos[0]["age"]);
        //
        //遍历李四二的信息,infos[1]把key值传给k.
        for(var k in infos[1]){
            console.log("k的值："+k);
            console.log(k+":"+infos[0][k]);
        }