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  1. #公式
  2. #x1 = (-b+math.sqrt(b*b-4*a*c)/2*a)
  3. #x2 = (-b-math.sqrt(b*b-4*a*c)/2*a)
  4. import math
  5. def quadratic(a, b, c):
  6. 	s = 'yes'
  7. if (b*b)-(4*b*c) > 0:
  8. 	print(s)
  9.  
  10. def quadratic(a, b, c):
  11. 	x1 = ((-b+math.sqrt(b*b-4*a*c))/(2*a))
  12. 	x2 = ((-b-math.sqrt(b*b-4*a*c))/(2*a))
  13. 	return x1, x2
  14. # 测试:
  15. print('quadratic(2, 3, 1) =', quadratic(2, 3, 1))
  16. print('quadratic(1, 3, -4) =', quadratic(1, 3, -4))
  17.  
  18. if quadratic(2, 3, 1) != (-0.5, -1.0):
  19.     print('测试失败')
  20. elif quadratic(1, 3, -4) != (1.0, -4.0):
  21.     print('测试失败')
  22. else:
  23.     print('测试成功')
Runtime error #stdin #stdout #stderr 0.11s 23516KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
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Traceback (most recent call last):
  File "./prog.py", line 7, in <module>
NameError: name 'b' is not defined
https://ideone.com/Bj4kr5
language:
Python 3 (python  3.9.5)
created:
4 years ago
visibility:
public

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