bc

[root@hexingxing ~]# bc 

# 计算器

[root@hexingxing ~]# bc 1.06.95
Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006 Free Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'. 
1+1
2
^C
(interrupt) Exiting bc.

# 计算 1 + 1 等于 2。

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沙发空缺中,还不快抢~