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
 # 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]
+b = 20
\ No newline at end of file
+n = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+l = 0
+h = len(n)-1
+while l <= h:
+    m = (l+h) // 2
+    g = n[m]
+    if g == b:
+        print("是",m)
+        break
+    elif g < b:
+        l = m+1
+    elif g > b:
+        l = m-1    
\ No newline at end of file