//游乐园门票
        //请输入星期几
        var week=Number(prompt('请输入星期几'));
        //再让用户输入年龄
        var age=Number(prompt('请输入年龄'));
        if(!isNaN(week) &&week>=0 && week<=6){
            if(!isNaN(age) && age>0 && age<100){
                //让年龄是否大于等于10岁作为大前提条件
                if(age>=10){
                    //年龄大于等于10
                    if(week==0 || week ==6){
                        alert('价格为500')
                    }
                    else{
                        alert('价格为300')
                    }
                }else{
                    //年龄小于10岁
                    if(week==0 || week==6){
                        alert('价格为210')
                    }
                    else{
                        alert('价格为140')
                    }
                }
            }    
        }else{
            alert('你输入的数字是不合法的')
        }