save project

binary_search.py

-a=17# 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]
-low=0
-high=len(num_list)--1
-def w(an):
+# a=17# 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]
+num_list=[]
+for i in range(101):
+    num_list.append(i)
+num= random.randint(0,100)
+u=0
+o=len(num_list)
+p=(u+o)//2
+def v(li,n)
+while u <= o:
+y=p
+    if y==num:
+        print(p)
+        break
+    elif y<num:
+        o=y-1
+    else:
+        u=y+1
+print(v(num_list,num))
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+def w(list,f):
+    low=0
+    high=len(num_list)-1
     while low <= high:
         mid=(low+high)//2
-    g=num_list[mid]
-    if g == a:
-        print("找到了",a)
-        break
-    elif g < a:
+        g=list[mid]
+        if g == f:
+            # print("找到了",a)
+            return f
+        elif g < f:
             low =mid+1
         else:
             high=mid-1
 
+print(w(num_list,a))
+