批处理实现文本内容居中显示的代码(怎么用批处理显示文字)

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a.txt 　代码: [Promise don't come easy] I should have known all along. There was something wrong. I just never read between the lines. Then I woke up one day and found you on your way. Leaving nothing but my heart behind. What can I do to make it up to you. Promises don't come easy. But tell me if there's a way to bring you back home to stay. Well I'd promises anything to you. I've been walkin' around with my head hanging down. Wondrin' what I'm gonna do. 'Cause when you walked out that door. 要求，CMD原始窗口中，不调节窗口大小，不生成临时文件，居中显示文本内容。输出如下：代码: [Promise don't come easy] I should have known all along. There was something wrong. I just never read between the lines. Then I woke up one day and found you on your way. Leaving nothing but my heart behind. What can I do to make it up to you. Promises don't come easy. But tell me if there's a way to bring you back home to stay. Well I'd promises anything to you. I've been walkin' around with my head hanging down. Wondrin' what I'm gonna do. 'Cause when you walked out that door. Batcher： sed -e :a -e "s/^.{1,}$/ & /;ta" a.txt sed.exe 　 batman：思路说明：以下代码是充分findstr命令的示例，使用findstr /n来取得行号同时兼容空行，并将行号进行变量赋值；使用findstr /o来取得第行的字符偏移量，但要通过上、下行的字符偏移差，因为字符偏移值是类计递加的，同时每行回车增加两个字符偏移，所以不可避免要对最后一行强加回车，在不破坏原文件的情况下只好生成临时文件；利用findstr /o能够一次性获得文本所有行的字符偏移量也就是字符总数，效率和逐字符判断相比肯定是高得多了。－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

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批处理去除指定字符前所有的0的代码如文本1.txt:代码:acb0h0b0cashgaa通过批处理将文本所有字符串字符a前的0去除输出如下：代码:acb0hbcashgaa要求：代码简洁、高效

批处理实现文本内容横列变纵列的代码因为论坛会吞掉文本每行的第一个空格，现截图上来。每行的字符数都一样，但未知多少个字符。注意，文本第三行r之后有一个空格。第四行x之后有一