diff --git a/diy1.py b/diy1.py
index 0735a44..9cf523d 100644
--- a/diy1.py
+++ b/diy1.py
@@ -1,5 +1,11 @@
 #定义一个函数sum_numbers()
 #要求这个函数能接收一个名为num的整型参数
 #要求这个函数能计算1+2+3+……+num的结果
+def sum_numbers(num):
+    if num == 1:
+        return 1
+    n = sum_numbers(num-1)
+    return num + n
+print(sum_numbers(4))
 
 
diff --git a/peach.py b/peach.py
new file mode 100644
index 0000000..d5287f2
--- /dev/null
+++ b/peach.py
@@ -0,0 +1,6 @@
+def peach(num):
+    if num == 10:
+        return 1
+    n=(peach(num+1)+1)*2
+    return n
+print(peach(10))
\ No newline at end of file