Linux结课作业.doc

一、Shell编程要求：写出两个Shell程序，每个程序不少于十五行；说明程序主要功能；每行给出注释。

#MajorFunction：simplecalculatorfor+-#/

#

#Time：SundayMay5,2013

#

#copyright：

#!/bin/bash

#!/bin/sh

main()

{

echo"calculatorV1.0"

#选择操作方式helporcalulateorexit

while[1]

do

readselect

if["$select"="help"]

then

echo"1calculator"

echo"0exit"

elif["$select"="1"]

then

cal;

elif["$select"="0"]

then

break;

fi

done

}

cal()

{

readstr

#针对读入的字串，提取操作数及操作符

num1=`echo$str|cut-d''-f1`

num2=`echo$str|cut-d''-f3`

sign=`echo$str|cut-d''-f2`

#根据sign选择对应操作+-#/

case$signin

+)

sum=`expr$num1+$num2`;

echo"$num1$sign$num2=$sum";;

-)

sum=`expr$num1-$num2`;

echo"$num1$sign$num2=$sum";;

\#)

sum=`expr$num1\*$num2`;

echo"$num1*$num2=$sum";;

/)

sum=`expr$num1/$num2`;

echo"$num1$sign$num2=$sum";;

esac

}

main

#!/bin/bash
#数字游戏

random()
{
FLOOR=0
RANGE=10
num=0
while[$num-le$FLOOR]
do
num=$RANDOM
#通过使随机数成为指定范围的随机数
let"num%=$RANGE"
done
#echo"Randomnumberbetween$FLOORand$RANGE---$number"

return
}
random
########################
D1=$num
random
D2=$num
while[$D2==$D1]
dorandom
D2=$num
done
random
D3=$num
while[$D3==$D2]||[$D3==$D1]
dorandom
D3=$num
done
random
D4=$num
while[$D4==$D3]||[$D4==$D2]||[$D4==$D1]
dorandom
D4=$num
done
#echo$D1$D2$D3$D4#########Thisisfortest

input_num()
{
#输入四个数据并判断比较对错情况返回?A?B
echo
echo"Pleaseinputfourdifferentnumbersbetween1~9(Justlikethis\"5214\")"
readS1S2S3S4

}
zero()
{
while[$S1==0]||[$S2==0]||[$S3==0]||[$S4==0]
doecho"zeroisnotallowd"
input_num
done
}

input_num
zero
while[$S1==$S2]||[$S1==$S3]||[$S1==$S4]||[$S2==$S3]||[$S2==$S4]||[$S3==$S4]
doecho"wronginput"
input_num
done

echo$S1$S2$S3$S4

declareA
declareB

#比较函数
compare()
{
A=0
B=0
if[$S1==$D1]
thenletA=$A+1
elif[$S1==$D2]||[$S1==$D3]||[$S1==$D4]
thenletB=$B+1
fi
if[$S2==$D2]
thenletA=$A+1
elif[$S2==$D1]||[$S2==$D3]||[$S2==$D4]
thenletB=$B+1
fi
if[$S3==$D3]
thenletA=$A+1
elif[$S3==$D1]||[$S3==$D2]||[$S3==$D4]
thenletB=$B+1
fi
if[$S4==$D4]
thenletA=$A+1
elif[$S4==$D1]||[$S4=