This is a basic program that looks for discrepancies in floating-point values rounded by format!("{f:.prec$}"),
for f64 f values.
The rounded values are compared to a naive string-based rounding. This benchmark is not infaillible since it uses
the full Display representation of the floating-point values, though a visual inspection on a number of tests hasn't
revealed any issue. At worst there might be a few false positives or negatives, but far fewer than Display::fmt
errors.
Usage:
Usage: rounding [-v][-n] [depth]
depth: max number of digits in the fractional part in the test (default = 6)-v: verbose output-n: negative values (by default, the test is performed on positive values)
Observed results:
=> 5555555 / 22222222 error(s) for depth 0-8, so 25.0 %
The ratio is 5/22 for all tested depths.
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