| 1 | #!/usr/bin/env python2
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| 2 | """
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| 3 | mycpp/examples/arith_ops.py
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| 4 | """
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| 5 | from __future__ import print_function
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| 6 |
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| 7 | import os
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| 8 | from mycpp.mylib import log
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| 9 |
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| 10 |
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| 11 | def run_tests():
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| 12 | # type: () -> None
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| 13 |
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| 14 | for i in xrange(8):
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| 15 | log("%d // 3 = %d", i, i // 3)
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| 16 |
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| 17 | log('')
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| 18 |
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| 19 | # SEMANTIC DIFFERENCE with negative numbers:
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| 20 | #
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| 21 | # - Python: -1 / 3 == -1 and
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| 22 | # -4 / 3 == -2
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| 23 | # it rounds toward negative infinity
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| 24 | # - C++: -1 / 3 == 0
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| 25 | # -4 / 3 == -1
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| 26 | # it rounds toward zero
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| 27 |
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| 28 | # TODO: We could create a function like python_div() to make them identical?
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| 29 |
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| 30 | if 0:
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| 31 | for i in xrange(8):
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| 32 | log("%d // 3 = %d", -i, -i // 3)
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| 33 |
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| 34 |
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| 35 | def run_benchmarks():
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| 36 | # type: () -> None
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| 37 | pass
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| 38 |
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| 39 |
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| 40 | if __name__ == '__main__':
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| 41 | if os.getenv('BENCHMARK'):
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| 42 | log('Benchmarking...')
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| 43 | run_benchmarks()
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| 44 | else:
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| 45 | run_tests()
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