开课第九天

画布 1今天是开课第九天，上午讲了关于方法的题，下午讲了新知识，嗯，今天有点热，下面就是本宝宝今天的收获：

（1）重载：方法名相同，参数列表不同叫做重载，和返回值类型无关。

                     重载方法名必须一致，参数列表不同，和返回值类型无关。

                    参数列表不同（个数不同，顺序不同，类型不同）。

                     方法重载的时候编译器会自动找到最适合的方法，找不到就出错。

                   例如：1）                          public static double get(double value){
                                                                                     return value;
                                                                                                         }
                                                     public static int get(double name){
                                                                              return (int)(name);
                                                                                                         }

                               2）public static double get(double value){
                                                                               return value;
                                                                                               }
                                                                public static int get(){
                                                                                     return 10;
                                                                                                 }

                              3） //DD
                                              public static double get(double value,double a){
                                                                                                 return value+a;
                                                                                                                           }
                                                                                                                   //DD
                                                   public static double get(double a,double value){
                                                                                                          return a+value ;
                                                                                                                              }

（2）递归     1）递归就是函数自己调用自己，所有的递归都能用循环表示，递归的优点就是让问题简单化，递归的缺点就是耗费内存。

                      2）什么问题可以用递归？一个问题可以被分解为若干个简单的子问题。

                                                               子问题和其上层问题的解决方案一致。

                                                                外层问题的解决依赖于子问题的解决。

                     3）例题：菲波那切数列    f(1)=1;f(2)=1;

                                                               f(n)=f(n-1)+f(n-2);

                     4)递归规则：递归体，结束条件。

以上就是本宝宝今天的新养料，嗯，就这些，加油。
  

                             

（2）