diff --git a/doc/软件需求规格说明书.doc b/doc/软件需求规格说明书.doc
new file mode 100644
index 0000000..844790b
Binary files /dev/null and b/doc/软件需求规格说明书.doc differ
diff --git a/src/abnormal.java b/src/abnormal.java
new file mode 100644
index 0000000..28fc2eb
--- /dev/null
+++ b/src/abnormal.java
@@ -0,0 +1,26 @@
+package day16;
+
+public class abnormal {
+    public static void main(String[] args) {
+        int a=10;
+        int b=0;
+        int[]arry = new int[4];
+        try{
+            System.out.println(a/b);
+            System.out.println( arry[10]);
+
+        }
+        catch(ArithmeticException c){//小范围放在前面，范围大的放在后面，小的返回不在运行
+            System.out.println("运算错误");
+
+        }
+        catch(ArrayIndexOutOfBoundsException c){
+            System.out.println("您的数组超出索引长度");
+
+        }
+      catch(Exception c ){//Exception c = new NullException()父类引用在指向子类对象
+            // Exception可以接受所有的子类对象，在实际开发中就只写这一行就可以了，不用写太多catch
+            System.out.println("出错啦");
+       }
+    }
+}