[鸟哥笔记]简单好用的计算器bc
-bash-3.2$ man bcbc(1) bc(1)NAME bc - An arbitrary precision calculator languageSYNTAX bc [ -hlwsqv ] [long-options] [ file ... ]VERSION This man page documents GNU bc version 1.06.DESCRIPTION bc is a language that supports arbitrary precision numbers with interactive execution of statements. There are some similarities in the syntax to the C programming language. A standard math library is available by command line option. If requested, the math library is defined before processing any files. bc starts by processing code from all the files listed on the command line in the order listed. After all files have been processed, bc reads from the standard input. All code is executed as it is read. (If a file contains a command to halt the processor, bc will never read from the standard input.) This version of bc contains several extensions beyond traditional bc implementations and the POSIX draft standard. Command line options can cause these extensions to print a warning or to be rejected. This document describes the language accepted by this processor. Extensions will be identified as such. OPTIONS -h, --help Print the usage and exit. -i, --interactive Force interactive mode. -l, --mathlib Define the standard math library. -w, --warn Give warnings for extensions to POSIX bc. -s, --standard Process exactly the POSIX bc language. -q, --quiet Do not print the normal GNU bc welcome. -v, --version Print the version number and copyright and quit.?
