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 = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
\ No newline at end of file
+k=0
+z=9
+f=9
+g=20
+while k<=z:
+    a=(k+z)//2
+    m = b[a]
+    if b[a]=f:
+        print(b[a])
+        break
+    elif m<f: 
+        k=a+1
+    else:
+        k=a-1
+while k<=z:
+    e=(k+z)//2
+    m = b[a]
+    if b[a]=f:
+        print(b[a])
+        break
+    elif m<f: 
+        k=a-1
+    else:
+        k=a+1
\ No newline at end of file