Wide area network (WAN) technologies are used when communication needs to travel over a larger geographical area.

Once upon a time, in the Kingdom of Loowater, a minor nuisance turned into a major problem.The shores of Rellau Creek in central Loowater had always been a prim...

Problem Description I have a very simple problem for you. Given two integers A and B, your job is to calculate the Sum of A + B.

Problem Description I have a very simple problem for you. Given two integers A and B, your job is to calculate the Sum of A + B.

Problem Description There are another kind of Fibonacci numbers: F(0) = 7, F(1) = 11, F(n) = F(n-1) + F(n-2) (n>=2).

有个文件要处理，因为很大，所以想把它切成若干份，每份N行，以便并行处理。怎么搞呢？查了下强大的shell，果然有现成的工具--split。 下面记录下基本用法：...

+ 加算 - 减算 * 乘算 / 除算 DIV 整除 MOD 取模 ** 乘方

在很多UNIX说明文件里，都有RLF控制字符，当我们把说明文件的内容输出成纯文本文件时，控制字符会变成乱码，col命令则能有效滤除这些控制字符。

参数main指定标题(图上方)，sub指定副标题(图下方), xlab与ylab(lable标签)分别指定x,y轴的标签。plot(x,y,main="这是图片的标题",sub="这是副标题"，xlab="x轴",ylab="y轴")...

Dhaka city is getting crowded and noisy day by day. Certain roads always remain blocked in congestion. In order to convince people avoid shortest routes, and he...