你们知道什么是Linux计算器么这个非常高深的运用技术将由我来非常讲解，Linux计算器NB在哪呢，下面我来进入讲述Linux计算器的无限领域。

19--bc Linux计算器

[root@CentOS4 ~]# bcbc 1.06Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc.This is free software with ABSOLUTELY NO WARRANTY.For details type `warranty'. (interrupt) use quit to exit.(interrupt) use quit to exit.quit[root@CentOS4 ~]# Linux计算器在bc上常用的运算符有：+加法-减法*乘法/除法（在没有设置scale精确度时候，自动取整）^指数%求余数（取模）在bc上还可以使用++ 变量-- 变量 变量 ++ 变量 --

[root@CentOS4 ~]# bcbc 1.06Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc.This is free software with ABSOLUTELY NO WARRANTY.For details type `warranty'. 1+23234+23/2*326725^315625100%40100%238quit[root@CentOS4 ~]# [root@CentOS4 ~]# bc bc 1.06Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc.This is free software with ABSOLUTELY NO WARRANTY.For details type `warranty'. scale=2 /*scale=number*/11/42.7511/33.66quit[root@CentOS4 ~]#
Linux计算器说明：scale=2 是设置小数精确度。/*备注部分*/

bc还可以运行一个Linux计算器带有复杂运算的程序文件（这属于bc的一个扩展属性），如：The following is code that uses the extended features of bc to implement a simpleprogram for calculating checkbook balances. This program is best kept in a file so that it can be used many times  withouthaving to retype it at every use.

Linux计算器使用vi建立一个test运算程序：root@CentOS4 ~]# vi testscale=2print ""nCheck book program!"n"print " Remember,deposits are negative transaction."n"print "Initial balance?";bal=read()bal /= 1print ""n"while (1){"current balance = ";bal"transaction?";trans =read()if(trans == 0) break;bal -= trans bal /= 1}

"test" [New] 14L, 268C written[root@CentOS4 ~]# ls计算结果：[root@CentOS4 ~]# bc "testbc 1.06 Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc.This is free software with ABSOLUTELY NO WARRANTY.For details type `warranty'. Check book program!Remember,deposits are negative transaction.Initial balance?560current balance = 560.00transaction?400current balance = 160.00transaction?100current balance = 60.00transaction?0quit[root@CentOS4 ~]#

今天Linux计算器就学到这些，发现很多内容非常的有意思。就近来的学习总结出，要想学好Linux计算器，重要一点是英语要学好。虽然大致的意思能看明白，但很吃力，经常金山词霸来查某一个单词的意思，这样往往浪费了很多的时间在解决单词的意思。

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