中国DOS联盟

如题:如何使echo A>A.txt输出的文件为一字节?

echo A>A.txt输出的文件为3字节
echo 1 >A.txt输出的文件为4字节
echo 2 >A.txt输出的文件为4字节

每次echo输出的文件都追加换行回车符,而输出1或2到文本中,更达到4个字节,如何使这些输出的文本只有一字节呢?

[ Last edited by Hanyeguxing on 2009-6-5 at 06:58 ]

set/p=A<nul>a.txt

[ Last edited by tireless on 2009-6-5 at 06:34 ]

echo A包括了字母A、回车和换行，所以有三个字节，正确答案见 2 L

Originally posted by tireless at 2009-6-5 06:26:
set/p=A<nul>a.txt

[ Last edited by tireless on 2009-6-5 at 06:34 ]

一看就明白，可俺怎么就没想到这个呢？

一直围着echo 想办法。。。惭愧