sed获取字符有一串字符"29djk39ef3kd93lsl39lds9r3dlf39fl"echo "29djk39ef3kd93lsl39lds9r3dlf39fl" | sed -n 's/[^0-9]*\?\([0-9]\+\?\)/\1/pg'可以匹配所有的数字,但为什么下面这句不行:sed -n 's/\([0-9]\)/\1/pg'
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/02 04:00:47
![sed获取字符有一串字符](/uploads/image/z/14550656-32-6.jpg?t=sed%E8%8E%B7%E5%8F%96%E5%AD%97%E7%AC%A6%E6%9C%89%E4%B8%80%E4%B8%B2%E5%AD%97%E7%AC%A6%2229djk39ef3kd93lsl39lds9r3dlf39fl%22echo+%2229djk39ef3kd93lsl39lds9r3dlf39fl%22+%7C+sed+-n+%27s%2F%5B%5E0-9%5D%2A%5C%3F%5C%28%5B0-9%5D%5C%2B%5C%3F%5C%29%2F%5C1%2Fpg%27%E5%8F%AF%E4%BB%A5%E5%8C%B9%E9%85%8D%E6%89%80%E6%9C%89%E7%9A%84%E6%95%B0%E5%AD%97%2C%E4%BD%86%E4%B8%BA%E4%BB%80%E4%B9%88%E4%B8%8B%E9%9D%A2%E8%BF%99%E5%8F%A5%E4%B8%8D%E8%A1%8C%EF%BC%9Ased+-n+%27s%2F%5C%28%5B0-9%5D%5C%29%2F%5C1%2Fpg%27)
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