shell script for homework02

homework/Key_01.txt

@@ -0,0 +1,26 @@
+根据如下表格，在可以操作的地方打上圈号，不可以操作的地方打上叉号。
+
+目录权限    0   1   2   3   4   5   6   7
+           --- --x -w- -wx r-- r-x rw- rwx
+
+ls          X   X   X   X   OX  O   OX  O
+/bin/ls     X   X   X   X   OX  O   OX  O
+cp file     X   O   X   O   X   O   X   O
+rm file     X   X   X   O   X   X   X   O
+nano file   X   O   X   O   X   O   X   O
+cd          X   O   X   O   X   O   X   O
+
+注：OX为如下的奇怪结果，只显示出文件名无其他信息。
+captain@ubuntu:~$ ls -l linux*
+ls: cannot access linux-homework/homework01: Permission denied
+total 0
+-????????? ? ? ? ?            ? homework01
+
+
+
+文件权限    0   1   2   3   4   5   6   7
+           --- --x -w- -wx r-- r-x rw- rwx
+
+cp file     X   X   X   X   O   O   O   O
+nano file   X   X   X   X   O   O   O   O
+run         X   X   X   X   X   O   X   O

homework/codes4homework02.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+# Program:
+# This program prints a 9*9 table on your screen.
+# History:
+# 2017/05/12 Captain First release
+
+function mul
+{
+	local x=$1
+	local y=$2
+	return $((x * y))
+}
+
+echo
+echo "Let's rock!"
+echo
+
+for ((i = 1; i <= 9; i++))
+do
+	if [ $i == 5 ]
+	then
+		echo "----------------:(----------------"
+	else
+		for ((j = 1; j <= 9; j++))
+		do
+			mul $i $j
+			result=$?
+			echo -n $result
+			if [ $result -gt 9 ]
+			then
+				echo -n "  "
+			else
+				echo -n "   "
+			fi
+		done
+		echo
+	fi
+done
+
+echo
+echo "That's all."
+echo

homework/homework03.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+# Author  : Captain
+# Date    : May 22, 2017
+# Purpose : Ouptput the top n words in a given English text file
+#
+if [ $# -ne 2 -a $# -ne 1 ]; then
+	echo "usage: `basename $0` [n] Input_File"
+	echo
+	exit
+fi
+
+if [ $# -eq 1 ]; then
+	I_TOP=10
+	I_FILE=$1
+fi
+
+if [ $# -eq 2 ]; then
+	I_TOP=$1
+	I_FILE=$2
+fi
+
+tr -sc 'A-Za-z' '[\012*]' < $I_FILE | \
+tee debug.txt | \
+tr 'A-Z' 'a-z' | \
+sort | \
+uniq -c | \
+sort -k1 -n -r | \
+head -$I_TOP | nl
+
+
+

homework/homework04.txt

@@ -0,0 +1,53 @@
+//add.c
+
+int add(int x, int y) {
+	return x+y;
+}
+
+//add.h
+#ifndef _ADD_H_
+#define _ADD_H_
+
+int add(int x, int y);
+
+#endif
+
+//calc.c
+
+#include <stdio.h>
+#include "add.h"
+
+int main() {
+	int x = 100;
+	int y = 100;
+	printf("%d + %d = %d\n", x, y, add(x, y));
+	return 0;	
+}
+
+#Makefile
+calc: calc.o libadd.a
+	gcc calc.o -o calc -I. -L. -ladd
+
+calc.o: calc.c
+	gcc -c calc.c -o calc.o
+
+libadd.a: add.o
+	ar -crv libadd.a add.o
+
+add.o: add.c
+	gcc -c add.c -o add.o
+
+clean:
+	rm -f calc calc.o libadd.a add.o adder.tar.gz
+
+install: calc
+	sudo cp calc /usr/local/bin/calc
+
+uninstall:
+	sudo rm -f hello /usr/local/bin/calc
+
+dist: clean
+	mkdir adder
+	cp add.h add.c calc.c Makefile adder/
+	tar czvf adder.tar.gz adder
+	rm -fr adder

homework/homework05.tex

@@ -0,0 +1,129 @@
+\documentclass[UTF8,12pt,a4paper]{ctexart}
+\ctexset{
+	section/format += \raggedright
+}
+%\usepackage[UTF8, heading = true]{ctex}
+\newcommand{\HRule}{\rule{\linewidth}{0.5mm}}
+\usepackage{listings}
+\usepackage{xcolor}
+\usepackage{amsmath, amssymb}
+\usepackage[hidelinks]{hyperref}
+
+
+\usepackage{graphicx}
+\usepackage{wrapfig}
+\usepackage{subcaption}
+\usepackage[font=small]{caption}
+
+\usepackage{fancyhdr}
+\pagestyle{fancy}
+\lhead{
+	\includegraphics[width=0.05\textwidth]{./BUPT_LOGO.png}
+}
+\chead{北京邮电大学}
+\rhead{[email protected]}
+\lfoot{}
+\cfoot{\thepage}
+\rfoot{}
+\renewcommand{\headrulewidth}{0.4pt}
+\renewcommand{\headwidth}{\textwidth}
+\renewcommand{\footrulewidth}{0pt}
+
+\usepackage[top=1in, bottom=1in, left=1.25in, right=1.25in]{geometry}
+\setlength{\headheight}{26pt} 
+\usepackage{setspace}
+\setstretch{1}%单倍行距
+
+\usepackage{fontspec}
+% 衬线字体：Linux Libertine
+\setmainfont{Linux Libertine O}
+% 无衬线字体：Linux Biolinum
+\setsansfont{Linux Biolinum O}
+% 等宽/打印机字体：Linux Libertine Mono
+\setmonofont{Linux Libertine Mono O}
+
+% 衬线字体：Noto Serif CJK SC
+\setCJKmainfont{Noto Serif CJK SC}
+% 无衬线字体：Noto Sans CJK SC
+\setCJKsansfont{Noto Sans CJK SC}
+% 等宽字体/打印机字体：Noto Sans Mono CJK SC
+\setCJKmonofont{Noto Sans Mono CJK SC}
+
+\usepackage{chemfig}
+\usepackage{skak}
+
+\begin{document}
+	\begin{center}
+		\large
+		\textbf{Linux操作系统第五次作业}
+
+		臧志强 2014210358
+
+		\today
+	\end{center}	
+
+	\section{有趣的示例}
+	\begin{figure}[htbp]
+		\centering
+		\begin{subfigure}[b]{0.45\textwidth}
+			\centering
+			\newgame
+
+			\showboard
+			\caption{国际象棋}
+			\label{fig:chess}
+		\end{subfigure}
+		~
+		\begin{subfigure}[b]{0.45\textwidth}
+			\centering
+			\chemfig{
+				NO_2-[:90]*6(=-(-NO_2)=(-CH_3)-(-O_2N)=-)}
+			\caption{2，4，6 -- 三硝基甲苯（TNT）}
+			\label{fig:TNT}
+		\end{subfigure}
+		\caption{有趣的示例}
+		\label{fig:demoes}
+	\end{figure}
+
+	\section{Apocalypse Tank（天启坦克）}
+
+	\begin{quote}
+		The apocalypse has begun!
+	\end{quote}
+	The successor to the old Soviet Mammoth tank, the \textit{Apocalypse Assault Tank} (seen in figure \ref{fig:icon}) was a powerful heavy tank used by the USSR during the first and second iterations of the Third World War. It featured twin 120mm cannons, anti-air missiles, very heavy armour, and self-repair abilities, making it a force to be reckoned with on the battlefield.
+	\begin{figure}[h]
+		\centering
+			\begin{subfigure}[c]{0.1\textwidth}
+				\includegraphics[width=\textwidth]{RA2_Apocalypse_Tank_Icons.png}
+				\newline
+				\newline
+				\includegraphics[width=\textwidth]{RA2_Apocalypse_Tank_Veteran_Icons.png}
+			\end{subfigure}
+		~~
+			\begin{subfigure}[c]{0.5\textwidth}
+				\includegraphics[width=\textwidth]{RA2_Black_Guard_with_anti-aliasing.jpg}
+			\end{subfigure}
+		\caption{Apocalypse tank}			
+		\label{fig:icon}
+	\end{figure}	
+%	作为老式苏维埃猛犸坦克的继承者，\textbf{天启突击坦克}是苏联在第三次世界大战的两次重演中使用的一种强大的重型坦克。 它装备有一对120mm火炮、对空导弹，同时拥有重装甲和自我修复能力，无疑是战场上的中坚力量。
+
+
+%	\begin{figure}
+%		\begin{center}
+%			\includegraphics[width=0.38\textwidth]{RA2_Apocalypse_Tank.png}\\
+%		\end{center}
+%		\label{fig:RA2_APOC}
+%	\end{figure}
+
+
+%	\chemfig{
+%		H_3C-[:72]{\color{blue}N}*5(- 
+%		*6(-(={\color{red}O})-
+%		{\color{blue}N}(-CH_3)-
+%		(={\color{red}O})-
+%		{\color{blue}N}(-CH_3)-=)--
+%		{\color{blue}N}=-)}
+
+
+\end{document}