哈哈

写一个 完整 的bash脚本 runtxt.sh ,功能:
• (1)把文章里所有大写字母替换为小写,输出到
en_low.txt
• (2)统计en_low.txt的总词数,以空格为单位计算词。
这个数字作为单独的一行输出到word_num.txt
• (3)用sort

#!/bin/bash
cat en_raw.txt | while read line
do
awk '{print tolower($line)}'tolower$line
done
./a.sh >en_low.txts
#!/bin/bash
inputfile="en_low.txt"
impfile="word_num.txt"
cat $inputfile | tr ' ' '\n' > $impfile
sort $impfile | uniq -c | sort -k/nr -k2

void CodeHuffman(HuffmanTree &T)
{
int *hc;
cd[n-1]='\0';
for(int i=0;i<=n;i++)
{
start=n-1;
for(c=i,f=T.F[i].parent;f!=0;c=f,f=T.F[f].parent)
{
if(T.F[i].lchild==c) cd[--start]='0';
else cd[--start]='1';
}
HC[i]=new ;
strcpy(T.F,$cd[start]);
}
free(cd);
}

#!/bin/bash
echo "what would you like to know about me?"
select question in name gender age nation college hometown high_school middle_school favorite_color favorite_things major quit
do
if [ $question = name ]
then
echo "My name is Yuanzhu."
elif [ "$question" = gender ]
then
echo "Male"
elif [ "$question" = age ]
then
echo "20"
elif [ "$question" = nation ]
then
echo "han"
elif [ "$question" = college ]
then
echo "BLCU"
elif [ "$question" = hometown ]
then
echo "Inner Mongolia"
elif [ "$question" = high_school ]
then
echo "Beishida jining fuzhong"
elif [ "$question" = middle_school ]
then
echo "Datong shizhong"
elif [ "$question" = favorite_color ]
then
echo "blue"
elif [ "$question" = favorite_things ]
then
echo "Music and Travel"
elif [ "$question" = major ]
then
echo "Computer Science and Technology"
elif [ "$question" = quit ]
then
echo "quit"
break
else
break
fi
done

!/bin/bash
grep "Beijing" corpus.txt > out.txt

1
#!/bin/bash
mkdir srcFrame
cd srcFrame
mkdir src
mkdir bin
mkdir lib
mkdir data
cd src
touch main.c
cd ..
cd lib
touch srcFrame.h
2
#!/bin/bash
grep '科技' phone.txt | cut -d# -f2,4 | sort -t# -k1 > result.txt
3
#!/bin/bash
sort gdp.txt -t: -nk3 -r | head -n20 > tm.txt
4
#!/bin/bash
echo "what would you like to know about me?"
select question in name gender age nation college hometown high_school middle_school favorite_color favorite_things major quit
do
if [ $question = name ]
then
echo "My name is Yuanzhu."
elif [ "$question" = gender ]
then
echo "Male"
elif [ "$question" = age ]
then
echo "20"
elif [ "$question" = nation ]
then
echo "han"
elif [ "$question" = college ]
then
echo "BLCU"
elif [ "$question" = hometown ]
then
echo "Inner Mongolia"
elif [ "$question" = high_school ]
then
echo "Beishida jining fuzhong"
elif [ "$question" = middle_school ]
then
echo "Datong shizhong"
elif [ "$question" = favorite_color ]
then
echo "blue"
elif [ "$question" = favorite_things ]
then
echo "Music and Travel"
elif [ "$question" = major ]
then
echo "Computer Science and Technology"
elif [ "$question" = quit ]
then
echo "quit"
break
else
break
fi
done
5
!/bin/bash
grep "Beijing" corpus.txt > out.txt
6
#!/bin/bash
cut mails.txt -d@ -f2 | uniq -c > sortmail.txt
7
#!/bin/bash
for (( i=1; i<=1000; i++ ))
do
echo $i | md5sum | head -c 6 >>rubbish.txt
echo -n "@" >>rubbish.txt
echo $i | md5sum | head -c 4 >>rubbish.txt
echo ".com" >>rubbish.txt
done
8,9,10
#!/bin/bash
grep San psm.txt
grep "^J" datafile
grep "700$" datafile
grep -v "834" datafile
grep [:::]12[:/:] datafile 或者 grep '\:12\/'datafile
grep -i [a-z][[:blank:]]k datafile
sed -e 's/Jon/Jonathan/ datafile
sed -n '5,10p' datafile
sed -e '/Lane/d' datafile
sed -e 's/^Fred/***Fred/' datafile
cat datafile | grep Popeye | sed -e 's/3\/19\/35/11\/14\/46/'
sed -e '/^$/d' datafile
awk -F ":" '{print $1}' datafile | awk '{print $2}'|awk '/^D/'
awk -F ":" '{print $1}' datafile | awk '{print $1}'|awk '/^[CE]/'
awk -F ":" '{print $1}' datafile | awk '{if(length($1)==4)print $1}'
awk -F ":" '/\[916\]/{print $1}' datafile
awk -F ":" '{print $1}' datafile | awk '{print $2,",",$1}'

数字逻辑 序列发生器
library IEEE;
use IEEE.STD_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity liuliuliu is
Port(
en,ck:in std_logic;
y:out std_logic);
end liuliuliu;
architecture pro of liuliuliu is
signal q:std_logic_vector(2 downto 0);
begin
process(en,ck)
begin
if(en='0')then
q<="000";
elsif(ck'EVENT AND ck='1')then
q<=q+1;
end if;
end process;
process(q)
begin
case q is
when "000"=>Y<='1';
when "001"=>Y<='0';
when "010"=>Y<='0';
when "011"=>Y<='0';
when "100"=>Y<='0';
when "101"=>Y<='0';
when "110"=>Y<='0';
when others=>Y<='1';
end case;
end process;
end pro;

#页面置换算法
@numberArray=(2,3,2,1,5,2,4,5,3,2,5,2);
LRO(\@numberArray);
CLOCK(\@numberArray);
sub LRO
{
my($numArr)=@_;
print "*****LRO*****\n";
my $interrupt=0;
@array=();
for(my $i=0;$i<@{$numArr};$i++){
$flag=1;
for(my $j=0;$j<@array;$j++){
if( ${$numArr}[$i]==${$array[$j]}[0] ){
${$array[$j]}[1]=$i;
$flag=0;
}
}
if($flag==1){
if(@array<3){
my @label=(${$numArr}[$i],$i);
push(@array,\@label);
$interrupt++;
}
else{
$min=100;
for(my $j=0;$j<@array;$j++){
if( ${$array[$j]}[1]<$min ){
$min=${$array[$j]}[1];
$pos=$j;
}
}
${$array[$pos]}[0]= ${$numArr}[$i];
${$array[$pos]}[1]= $i;
$interrupt++;
}
}
for(my $j=0;$j<@array;$j++){
print "${$array[$j]}[0] ";
}
print "\n";
#getc();
}
print "中断次数：$interrupt\n";
}
sub CLOCK
{
my($numArr)=@_;
print "*****CLOCK*****\n";
my $interrupt=0;
@array=();
$pointer=0;
for(my $i=0;$i<@{$numArr};$i++){
$flag=1;
for(my $j=0;$j<@array;$j++){
if( ${$numArr}[$i]==${$array[$j]}[0] ){
${$array[$j]}[1]=(${$array[$j]}[1]+1)%2;
$flag=0;
}
}
if($flag==1){
if(@array<3){
my @label=(${$numArr}[$i],1);
push(@array,\@label);
$pointer=($pointer+1)%3;
$interrupt++;
}
else{
for(my $j=$pointer;;$j++){
$j=$j%3;
if( ${$array[$j]}[1]==0 ){
${$array[$j]}[0]= ${$numArr}[$i];
${$array[$j]}[1]= 1;
$pointer=$j+1;
$interrupt++;
last;
}
${$array[$j]}[1]= 0;
}
}
}
for(my $j=0;$j<@array;$j++){
print "${$array[$j]}[0] ";
}
print "\n";
#getc();
}
print "中断次数：$interrupt\n";
}