111

159-1.py

@@ -1,20 +1,26 @@
+#原函数换成题干的*********************
 def fx(x):
     return x**4-3*x+1
 
 # 二分法求解方程的根
 def SolveByDivTwo(x1,x2,err):
+    count = 1
+    
     while abs(x2-x1) >= err:
         x = (x1+x2)/2
+        print(f"k={count},a{count}={x1},b{count}={x2},x{count}={x},fx(x)={fx(x)}")
         if fx(x) * fx(x1) < 0:
             x2 = x
         else:
             x1 = x
+        count += 1
+
     return (x1+x2)/2
 
-
+#范围和精度要求换成题干的############
 if __name__ == "__main__":
     x1 = 0.3
     x2 = 0.4
-    err = 0.5e-5
+    err = 0.5e-5     #精度要求##################
     root = SolveByDivTwo(x1, x2, err)
-    print(f"Root: {root:.5f}")
+    print(f"Root: {root:.5f}")