shell脚本-比较两个整数大小
#!/bin/bashread -p "Pls input two num:" a b
#no1
[ -z "$a" ] || [ -z "$b" ] && {
echo "Pls input two num again."
exit 1
}
#no2
expr $a + 10 &>/dev/null
RETVAL1=$?
expr $b + 10 &>/dev/null
RETVAL2=$?
test $RETVAL1 -eq 0 -a $RETVAL2 -eq 0 ||{
echo "pls input two "num" again."
exit 2
}
#num3
[ $a -lt $b ] &&{
echo "$a < $b"
}
#num4
[ $a -eq $b ] &&{
echo "$a = $b"
}
#num5
[ $a -gt $b ] &&{
echo "$a > $b"
}
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