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Similar to scientific mode, engineering mode also displays numbers in base 10 exponential notation, with the difference that exponents are always multiples of 3, to facilitate the interpretation in terms of SI prefixes. The mode is activated in config thru "engineering" or "eng. For base and base2, it uses the special value 1000.
120 lines
3.1 KiB
Plaintext
120 lines
3.1 KiB
Plaintext
NAME
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base2 - set 2nd output base
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SYNOPSIS
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base2([mode])
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TYPES
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mode real
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return real
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DESCRIPTION
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By default, calc will output values according to the default base
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as controlled by the base() builtin function.
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The base2() builtin function, if given a non-zero argument, enables
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double base output mode. In double base output mode, calc values
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are displayed twice, once according to base() and again according
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to base2(). In double base output mode, the second time a value is
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displayed, it is displayed within comments:
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21701 /* 0x54c5 */
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The arguments for base2() are identical to base() with the addition
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of the 0 value:
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base2 equivalent
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config("mode2")'s
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2 "binary" base 2 fractions
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"bin"
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8 "octal" base 8 fractions
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"oct"
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10 "real" base 10 floating point
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"float"
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"default"
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-10 "integer" base 10 integers
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"int"
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16 "hexadecimal" base 16 fractions
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"hex"
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1/3 "fraction" base 10 fractions
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"frac"
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1e20 "scientific" base 10 scientific notation
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"sci"
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"exp"
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1000 "engineering" base 10 notation with exponent
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"eng" multiple of 3
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0 "off" disable double base output
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For convenience, any non-integer non-zero value is assumed to mean
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base 10 fractions and any integer >= 2^64 is assumed to mean base 10
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scientific notation.
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These base2() calls have the same meaning as config("mode2", "fraction"):
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base2(1/3) base2(0.1415) base2(16/37)
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These base2() calls have the same meaning as config("mode2", "scientific"):
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base2(1e20) base2(2^64) base2(2^8191-1)
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However the base2() function will only return one of the base values
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listed in the table above.
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EXAMPLE
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; base2()
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0
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; base2(8)
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0 /* 0 */
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; print 10
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10 /* 012 */
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; base2(16),
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; 131072
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131072 /* 0x20000 */
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; 2345
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2345 /* 0x929 */
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LIMITS
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none
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LINK LIBRARY
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int math_setmode2(int newmode)
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NOTE: newmode must be one of MODE_DEFAULT, MODE_FRAC, MODE_INT,
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MODE_REAL, MODE_EXP, MODE_ENG, MODE_HEX, MODE_OCTAL, MODE_BINARY,
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MODE2_OFF
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SEE ALSO
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base, config, str
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## Copyright (C) 2002 Landon Curt Noll
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##
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## Calc is open software; you can redistribute it and/or modify it under
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## the terms of the version 2.1 of the GNU Lesser General Public License
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## as published by the Free Software Foundation.
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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## distributed with calc under the filename COPYING-LGPL. You should have
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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##
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## Under source code control: 2002/12/29 00:21:07
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## File existed as early as: 2002
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##
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## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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