# -*- coding: utf-8 -*-
import math
def quadratic(a, b, c):
s = b*b - 4*a*c
if s< 0:
print('无解')
else:
x1 = (-1*b+math.sqrt( b*b-4*a*c ))/(2*a)
x2 = (-1*b-math.sqrt( b*b-4*a*c ))/(2*a)
return x1,x2
print('quadratic(2, 3, 1) =', quadratic(2, 3, 1))
print('quadratic(1, 3, -4) =', quadratic(1, 3, -4))
if quadratic(2, 3, 1) != (-0.5, -1.0):
print('测试失败')
elif quadratic(1, 3, -4) != (1.0, -4.0):
print('测试成功')
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WeiDa的MiaoXiao
# -*- coding: utf-8 -*-
import math
def quadratic(a, b, c):
s = b*b - 4*a*c
if s< 0:
print('无解')
else:
x1 = (-1*b+math.sqrt( b*b-4*a*c ))/(2*a)
x2 = (-1*b-math.sqrt( b*b-4*a*c ))/(2*a)
return x1,x2
print('quadratic(2, 3, 1) =', quadratic(2, 3, 1))
print('quadratic(1, 3, -4) =', quadratic(1, 3, -4))
if quadratic(2, 3, 1) != (-0.5, -1.0):
print('测试失败')
elif quadratic(1, 3, -4) != (1.0, -4.0):
print('测试失败')
else:
print('测试成功')