应付python软件实验作业之二分查找求解立方根
#二分法求立方根(全部实数)Cube = float(input("请输入一个数字:"))
Ep = 1E-6
Cube_1 = abs(Cube)
lower = 1
higher = Cube_1
Guess = (lower+higher)/2.0
if Cube == 0:
print("0是",Cube,"立方根的解")
elif Cube_1 > 1:
while abs(Guess**3 - Cube_1) >= Ep:
if Guess**3 < Cube_1:
lower = Guess
else:
higher = Guess
Guess = (higher+lower)/2.0
if Cube > 0:
print(Guess,"是",Cube,"立方根的近似解")
if Cube < 0:
print("-",Guess,"是",Cube,"立方根的近似解")
elif Cube_1 > 0 and Cube_1 < 1:
lower = Cube_1
higher = 1.0
Guess = (lower+higher)/2.0
while abs(Guess ** 3 - Cube_1) >= Ep:
if Guess**3 < Cube_1:
lower = Guess
else:
higher = Guess
Guess = (higher+lower)/2.0
if Cube > 0:
print(Guess,"是",Cube,"立方根的近似解")
if Cube < 0:
print("-",Guess,"是",Cube,"立方根的近似解")
可以说是能运行但是十分繁杂甚至九分 有啥改进措施还望提提
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