JAVASCRIPT也可以面向对象

 

 

先声明一个Person类作为父类： 

function Person(name,age)...{
       this.name = name;
       this.age = age;
       if (typeof(Person._initialized) == "undefined")...{
             Person.prototype.EatFood = function()...{
                    alert(this.nae + "is eating rice..."); 
             };
      }

          Person._initialized = true;
}

 

让后声明一个Teacher类和一个Student类,这两个类继承Person类

 

//老师类
function Teacher(name,age,course)...{
       Person.call(this,name,age);
       this.course = course;

       if(typeof(Teacher._initialized) == "undefined")...{
             Teacher.prototype.Teach = function()...{
                   alert(this.name + " is  teach " + this.course + "...");
              };
       
       }

       Teacher._initialized = true;
}
Teacher.prototype = new Person();

//学生类
function Student(name,age,stuId)...{
       Person.call(this,name,age);
       this.stuId = stuId;
       
       if (typeof(Student._initialized) == "undefined")
      ...{
               Student.prototype.Study = function()...{
                      alert(this.name + " is studing ...");
               };
      }
 
      Student._initialized = true;
}
Student.prototype = new Person();