1/* 2 * ***************************************************************************** 3 * 4 * Copyright (c) 2018-2020 Gavin D. Howard and contributors. 5 * 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * * Redistributions of source code must retain the above copyright notice, this 12 * list of conditions and the following disclaimer. 13 * 14 * * Redistributions in binary form must reproduce the above copyright notice, 15 * this list of conditions and the following disclaimer in the documentation 16 * and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 * 30 * ***************************************************************************** 31 * 32 * The bc help text. 33 * 34 */ 35 36usage: %s [options] [file...] 37 38bc is a command-line, arbitrary-precision calculator with a Turing-complete 39language. For details, use `man %s`. 40 41This bc is compatible with both the GNU bc and the POSIX bc spec. See the GNU bc 42manual (https://www.gnu.org/software/bc/manual/bc.html) and bc spec 43(http://pubs.opengroup.org/onlinepubs/9699919799/utilities/bc.html) 44for details. 45 46This bc has three differences to the GNU bc: 47 48 1) Arrays can be passed to the builtin "length" function to get the number of 49 elements currently in the array. The following example prints "1": 50 51 a[0] = 0 52 length(a[]) 53 54 2) The precedence of the boolean "not" operator (!) is equal to that of the 55 unary minus (-), or negation, operator. This still allows POSIX-compliant 56 scripts to work while somewhat preserving expected behavior (versus C) and 57 making parsing easier. 58 3) This bc has many more extensions than the GNU bc does. For details, see the 59 man page. 60 61Options: 62 63 -e expr --expression=expr 64 65 Run "expr" and quit. If multiple expressions or files (see below) are 66 given, they are all run before executing from stdin. 67 68 -f file --file=file 69 70 Run the bc code in "file" and exit. See above as well. 71 72 -g --global-stacks 73 74 Turn scale, ibase, and obase into stacks. This makes the value of each be 75 be restored on returning from functions. See the man page for more 76 details. 77 78 -h --help 79 80 Print this usage message and exit. 81 82 -i --interactive 83 84 Force interactive mode. 85 86 -l --mathlib 87 88 Use predefined math routines: 89 90 s(expr) = sine of expr in radians 91 c(expr) = cosine of expr in radians 92 a(expr) = arctangent of expr, returning radians 93 l(expr) = natural log of expr 94 e(expr) = raises e to the power of expr 95 j(n, x) = Bessel function of integer order n of x 96 97 -P --no-prompt 98 99 Disable the prompt in interactive mode. 100 101 -q --quiet 102 103 Don't print version and copyright. 104 105 -s --standard 106 107 Error if any non-POSIX extensions are used. 108 109 -w --warn 110 111 Warn if any non-POSIX extensions are used. 112 113 -v --version 114 115 Print version information and copyright and exit. 116