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
 num_list = [1, 3, 5, 8, 11, 15, 17, 18, 20, 21]
+bingo_num=input("请输入要查的数":)
+bingo_num=int(bingo_num)
+low=0
+high=len(num_list)-1
+while low<=high:
+    mid=(low+high)//2
+    find_num=num_list[mid]
+    if find_num==bingo_num:
+        print("找到了，他在列表里的索引值是:"mid)
+        break
+    elif find_num<bingo_num:
+        low=mid+1
+    elif find_num>bingo_num:
+        low=mid-1
\ No newline at end of file