while(())怎么用啊？

[大冬瓜]

创建一个大文件，内容全是x

代码： 全选

 1 #!/bin/sh
 2 set -x
 3 line_length=80
 4 
 5 out_file=`pwd`/bigfile
 6 >$out_file
 7 total_line=$1
 8 line_count=0
 9 char=x
10 
11 while (( line_count < total_count ))
12 do 
13         char_count=0
14         while (( char_count < line_length ))
15         do
16                 echo -n "${char}" >> $outfile
17                 echo -n "${char_count} "
18                 $((char_count=char_count+1 ))
19         done    
20         $((line_count=line_count+1))
21         echo >> $out_file
22 done    
23 echo $out_file

[YeLee]

[bash]
#!/bin/bash
line_length=80
line_count=0
char=x
while [ $line_count -lt 20 ]
do
char_count=0
while [ $char_count -lt $line_length ]
do
echo -n "${char}"
char_count=`expr $char_count + 1`
done
echo .
line_count=`expr $line_count + 1`
done


[/bash]