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diy1.py

 #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_number(num):
-    if num==1:
-        return 1
+# def sum_number(num):
+#     if num==1:
+#         return 1
+
+#     temp=sum_numbers(num - 1)
+#     return num +temp
+# result = sum_numbers(100)
+# print(result)
 
-    temp=sum_numbers(num - 1)
-    return num +temp
-result = sum_numbers(100)
+def func(n):
+    if n<=2:
+        return 1
+    elif n>2:
+        valne=func(n-1)+func(n-2)
+        return valne
+result=func(60)
 print(result)
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