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27 lines
524 B
27 lines
524 B
# test floating point floor divide and modulus
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# it has some tricky corner cases
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def test(x, y):
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div, mod = divmod(x, y)
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print("%.8f %.8f %.8f %.8f" % (x // y, x % y, div, mod))
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print(div == x // y, mod == x % y, abs(div * y + mod - x) < 1e-15)
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test(1.23456, 0.7)
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test(-1.23456, 0.7)
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test(1.23456, -0.7)
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test(-1.23456, -0.7)
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a = 1.23456
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b = 0.7
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test(a, b)
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test(a, -b)
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test(-a, b)
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test(-a, -b)
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for i in range(25):
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x = (i - 12.5) / 6
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for j in range(25):
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y = (j - 12.5) / 6
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test(x, y)
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