auto save

diy1.py

@@ -2,11 +2,10 @@
 #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(n):
-    if n<=2:
+    if n==1:
         return 1
-    elif n>2:
-        sum = sum_numbers(n-1)+sum_numbers(n-2)
-        return sum
+    sum=sum_numbers(n-1)
+    return sum+n
 
 sum1 = sum_numbers(4)
 print(sum1)

diy2.py

+def sum(n):
+    if n<=2:
+        return 1
+    elif n>2:
+        result= sum(n-1)+sum(n-2)
+        return result
+
+sum1=sum(6)
+print(sum1)
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