save project

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
-n=0
-def sum_numbers(num):
-    if num==1:
+e=1
+sss=0
+def hh(n):
+    if n<=2:
         return 1
-    n=num+sum_numbers(num-1)
-    return n
+    elif n>2:
+        a=hh(n-1)+hh(n-2)
+        return a            
+while True:
+    if sss < 20:
+        e=e+1
+        sss=hh(e)
         
-qq=sum_numbers(100)
-print(qq)
\ No newline at end of file
+        print(sss)
+    else:
+        break
+
+
+print(e)
\ No newline at end of file