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float_divmod.py

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# test floating point floor divide and modulus

# it has some tricky corner cases

def test(x, y):

div, mod = divmod(x, y)

print("%.8f %.8f %.8f %.8f" % (x // y, x % y, div, mod))

print(div == x // y, mod == x % y, abs(div * y + mod - x) < 1e-15)

test(1.23456, 0.7)

test(-1.23456, 0.7)

test(1.23456, -0.7)

test(-1.23456, -0.7)

a = 1.23456

b = 0.7

test(a, b)

test(a, -b)

test(-a, b)

test(-a, -b)

for i in range(25):

x = (i - 12.5) / 6

for j in range(25):

y = (j - 12.5) / 6

test(x, y)