111

120-4.py

@@ -1,23 +1,28 @@
+#把函数改成题干的####################
 def fx(x):
     return 1/x
 
 
 # 逐次分半梯形递推公式
 def SplitTrapezoidal(a,b,err):
+    count = 1
     t1 = (b-a)*(fx(a)+fx(b))/2
+    print(f"t{count}={t1}")
     k = 1
     while True:
         tmp = 0
         for i in range(1, 2**(k-1)+1):
             tmp += fx(a + (b-a)*(2*i-1)/(2**k))
         t2 = t1/2+(b-a)*tmp/(2**k)
+        count *= 2
+        print(f"t{count}={t2}")
         if abs(t2-t1) < err:
             break
         t1 = t2
         k += 1
     return t2,k
 
-
+#把范围ab换成题干的范围，err换成题干的精度要求############
 if __name__ == "__main__":
     a = 1
     b = 3