為什么不用判斷是否有根？直接運算？
import math
def quadratic_equation(a, b, c):
??? t = math.sqrt(b * b - 4 * a * c)
??? return (-b + t) / (2 * a), (-b - t ) / (2 * a)
??????? ?
?????? ?
print quadratic_equation(2, 3, 0)
print quadratic_equation(1, -6, 5)
qq_慕工程9421730
2020-02-07
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2020-02-07
有道理，確實應該先判斷b*b-4*a*c>=0,要不然就運算錯誤了。
import math
def quadratic_equation(a, b, c):
??? if?? (b * b - 4 * a * c)>=0:
??????? t = math.sqrt(b * b - 4 * a * c)
??????? return (-b + t) / (2 * a), (-b - t ) / (2 * a)
??? else:
??????? return "import ERROR"
print quadratic_equation(2, 3, 9)
print quadratic_equation(1, -6, 5)