linux - 使用 awk 反转字段

Question

我需要反转包含以下内容的文本文件的字段:

Computer science is fun
I also enjoy math
But I don't like science

我需要 awk 来输出:

line 1: Computer science is fun
line 1 reversed: fun is science Computer

line 2: I also enjoy math
line 2 reversed: math enjoy also I

.......等等。这是我现在拥有的:

BEGIN {print "start"}
{
    for(i=NF; i>=1; i--)
    {
        printf "line %d: %s\n", NR , $0;
        printf "line %d: reversed: %s", NR, $i;
    }
}

Answer 1

你很接近:

BEGIN {print "start"}
{
    printf "line %d: %s\n", NR , $0
    printf "line %d: reversed:", NR
    for(i=NF; i>=1; i--)
    {
        printf " %s", $i
    }
    print ""
}

以上假设您不关心字段之间的空白。