请教:一个阿拉伯数字转换为大写数字脚本的理解(内含详细源码)
以下是一个将阿拉伯数字转换为大写数字的shell脚本(bash)，但我对它的实现方法基本看不懂，请各位帮忙看下，给我讲解下思路，谢谢！阿拉伯数字转换为大写数字的脚本
#!/bin/bash
cconvert(){
declare -a cnum;
declare -a cmag;
cnum="壹"
cnum="贰"
cnum="叁"
cnum="肆"
cnum="伍"
cnum="陆"
cnum="柒"
cnum="拔"
cnum="玖"
cnum="零"
cmag=""
cmag="拾"
cmag="佰"
cmag="仟"
cmag="万"
cmag="拾"
cmag="百"
cmag="千"
tempalpha="$1";
ctempmag=$2;
if [ $tempalpha == "00000000" ] ; then
CSTR="";
return 0;
fi
let templength="${#tempalpha}";
CSTR="";
for ((m=0;m<templength;m++))
do
tempi=${tempalpha:m:1};
let tempj="$templength-$m-1";
if ((( tempi == 0 )) && (( tempj ==4 ))); then
CSTR=$CSTR"万";
elif (( tempi == 0 )); then
CSTR=$CSTR${cnum};
else
CSTR=$CSTR${cnum[$tempi]}${cmag[$tempj]};
fi
done
CSTR=$(echo $CSTR | sed -e 's/零零*/零/g' -e 's/零$//g' -e 's/零零零万//g');
CMAG="";
for ((m=0;m<ctempmag;m++))
do
CMAG=$CMAG"亿";
done
CSTR=$CSTR$CMAG;
}
alpha=$1;
length=${#alpha};
let k="$length/8";
let modl="$length%8";
MYSTR="";
tempstr=${alpha:0:$modl};
if ((modl>0)); then
cconvert $tempstr $k;
fi
MYSTR=$MYSTR$CSTR;
for ((i=0;i<k;i++))
do
let pos="$i*8+modl";
tempstr=${alpha:$pos:8};
let tempmag="$k-$i-1";
cconvert $tempstr $tempmag;
MYSTR=$MYSTR$CSTR;
done
echo $MYSTR | sed -e 's/亿零万/亿零/g'-e 's/零万/万/g' -e 's/零亿/亿/g' -e 's/零零*/零/g' -e 's/零$//g'
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