shell编程：for循环结构
用法1：
s1=test.
s2=.wav
s3=.mp3
s4=0
s5=00
i=0
str="sox ./${s1}${i}${s2} ./${1}${s3}"
./tts -c bcgirl.0.0.4.bin -b 1 -i input.txt -s 1.0 -speed 1.0
for i in 0 1
do
sox ./${s1}${i}${s2} ./${i}${s3}
done
rm ./*.wav
用法2：
s1=test.
s2=.wav
s3=.mp3
s4=0
s5=00
i=0
str="sox ./${s1}${i}${s2} ./${1}${s3}"
./tts -c bcgirl.0.0.4.bin -b 1 -i input.txt -s 1.0 -speed 1.0
for((i=0;i<4;i++))
do
sox ./${s1}${i}${s2} ./${i}${s3}
done
rm ./*.wav