save project

binary_search.py

@@ -4,16 +4,20 @@ num = 20
 low = 0
 low = 0
 high = len(num_list )-1
 high = len(num_list )-1
 while True:
 while True:
-    mid = (low+high)//2
-    guess = num_list[mid]
-    if guess == num:
-        print("找到了",mid)
-        break
-    elif guess < num:
-        low = mid+1
+    if high<=num:
+        mid = (low+high)//2
+        guess = num_list[mid]
+        if guess == num:
+            print("找到了",mid)
+            break
+        elif guess < num:
+            low = mid+1
+        else:
+            
+            high = mid-1
     else:
     else:
-        
-        high = mid-1
+        print("没找到")
+        break
 
 
         
         
         
         
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