From 6ed4581f545069488446682ee9b052798626327d Mon Sep 17 00:00:00 2001 From: Damien George Date: Tue, 13 Jun 2017 13:36:56 +1000 Subject: py/formatfloat: Fix number of digits and exponent sign when rounding. This patch fixes 2 things when printing a floating-point number that requires rounding up of the mantissa: - retain the correct precision; eg 0.99 becomes 1.0, not 1.00 - if the exponent goes from -1 to 0 then render it as +0, not -0 --- tests/float/string_format_modulo.py | 3 +++ tests/float/string_format_modulo3.py | 3 +-- tests/float/string_format_modulo3.py.exp | 3 +-- 3 files changed, 5 insertions(+), 4 deletions(-) (limited to 'tests/float') diff --git a/tests/float/string_format_modulo.py b/tests/float/string_format_modulo.py index 03c8dd00a..aea534247 100644 --- a/tests/float/string_format_modulo.py +++ b/tests/float/string_format_modulo.py @@ -44,3 +44,6 @@ print(('%.40g' % 1e-3)[:2]) print(('%.40g' % 1e-4)[:2]) print("%.0g" % 1) # 0 precision 'g' + +print('%.1e' % 9.99) # round up with positive exponent +print('%.1e' % 0.999) # round up with negative exponent diff --git a/tests/float/string_format_modulo3.py b/tests/float/string_format_modulo3.py index 563964786..5d26f2575 100644 --- a/tests/float/string_format_modulo3.py +++ b/tests/float/string_format_modulo3.py @@ -1,4 +1,3 @@ # uPy and CPython outputs differ for the following print("%.1g" % -9.9) # round up 'g' with '-' sign -print("%.1e" % 9.99) # round up with positive exponent -print("%.1e" % 0.999) # round up with negative exponent +print("%.2g" % 99.9) # round up diff --git a/tests/float/string_format_modulo3.py.exp b/tests/float/string_format_modulo3.py.exp index b158c7d7f..71432b340 100644 --- a/tests/float/string_format_modulo3.py.exp +++ b/tests/float/string_format_modulo3.py.exp @@ -1,3 +1,2 @@ -10 -1.00e+01 -1.00e-00 +100 -- cgit v1.2.3