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
+bingo_num = 20
 num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
-mid = (low + high)//2
-guess = 
-if guess = mid:
-    print('找到了')
-elif mid < guess:
-    low = mid+1
-else:
-    high = mid - 1
\ No newline at end of file
+low = 0
+high = len (num_list)-1
+
+while low <= high:
+    mid = (low + high)//2
+    guess_num = num_list[mid]
+    if guess_num == bingo_num:
+        print('找到了，数字是：',mid)
+        break
+    elif bingo_num > guess_num:
+        low = mid+1
+    else:
+        high = mid-1
\ No newline at end of file