c高级day4

1.有m1.txt m2.txt m3.txt m4.txt，分别创建出对应的目录，m1 m2 m3 m4 并把文件移动到对应的目录下

2.99乘法表

#!/bin/bash
 
touch m1.txt m2.txt m3.txt m4.txt
for ((i = 1; i < 5; i++))
do
    mkdir m$i
    mv m$i.txt m$i
done

#!/bin/bash 
for((A=1;A<=9;A++))
do
	for((B=1;B<=$A;B++))
	do
		echo -n -e "$B*$A=$((A*B)) \t"
	done
	echo
done