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  1. import math
  2.  
  3. def quadratic(a, b, c):
  4. 	x1=-b+math.sqrt(b**2-4*a*c)/2*a
  5. 	x2=-b-math.sqrt(b**2-4*a*c)/2*a
  6. 	return x1,x2
  7.  
  8. # 测试:
  9. print('quadratic(2, 3, 1) =', quadratic(2, 3, 1))
  10. print('quadratic(1, 3, -4) =', quadratic(1, 3, -4))
  11.  
  12. if quadratic(2, 3, 1) != (-0.5, -1.0):
  13.     print('测试失败')
  14. elif quadratic(1, 3, -4) != (1.0, -4.0):
  15.     print('测试失败')
  16. else:
  17.     print('测试成功')
Success #stdin #stdout 0.08s 14160KB
comments (?)
stdin 
Standard input is empty
stdout 
quadratic(2, 3, 1) = (-2.0, -4.0)
quadratic(1, 3, -4) = (-0.5, -5.5)
测试失败
https://ideone.com/xRPAbs
language:
Python 3 (python  3.12)
created:
10 days ago
visibility:
public

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