save project

binary_search.py

 # 使用二分查找法，找出9和20在列表里面的索引
-num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
\ No newline at end of file
+num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+
+b = 20
+l = 0
+h = len(num_list)-1
+
+while l <= h:
+    m = (l+h) // 2
+    g = num_list[m]
+    if g == b:
+        print("找到了,它在列表里的索引是",m)
+        break
+    elif g < b:
+        l = m+1
+    elif g < b:  
+        h = m-1 
\ No newline at end of file