save project

binary_search.py

@@ -5,11 +5,27 @@ high=len(num_list)-1
 while True:
     mid=(low+high)//2
     guess=num_list[mid]
-    if guess==17:
+    if guess==20:
         print("找到了！")
         print(str(mid))
         break
-    elif guess<17:
+    elif guess<20:
         low=mid+1
     else:
-        high=mid-1
\ No newline at end of file
+        high=mid-1
+low=0
+high=len(num_list)-1
+while True:
+    mid=(low+high)//2
+    guess=num_list[mid]
+    if guess==9:
+        print("找到了！")
+        print(str(mid))
+        break
+    elif guess<9:
+        low=mid+1
+    else:
+        high=mid-1
+    if high <= low:
+        print("没有这个数！")
+        break
\ No newline at end of file