超星 - 5.2 awk进阶-学习自测 - 查题吧

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打印输入行中单词字符（字母数字下划线）的个数，请使用gsub函数完成计数。$ echo 'hi there' | awk '____________________'7

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打印输入行中单词字符（字母数字下划线）的个数，请利用分隔符且不使用替换函数完成计数。$ echo 'u-no;co%."(do_12:as' | awk ____________________12

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请根据输入输出填空，不能使用替换函数和字符串拼接函数$ echo '1 "grape" and "mango" and "guava"' | awk ____________________"grape","guava"

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请根据输入输出填空，不能使用替换函数和字符串拼接函数（提示：使用内置变量FPAT指定字段模式）$ echo '("a 1""b""c-2""d")' | awk ____________________"a 1","c-2"

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请根据输入输出填空，不能使用替换函数，也不能显式使用print函数$ echo '1,2,3,4,5' | awk ____________________1,2,5

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仅显示每行输入的第3和第5个字符$ echo -e 'restore\ncat one\ncricket' | awk ____________________sotoik

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文件jumbled.txt中每行包含被各种不同分隔符分隔的单词，请打印出所有包含an或at或in或it 的单词，每行打印一个单词$ cat jumbled.txtovercoats;furrowing-typeface%pewter##hobbywavering:concession/woof\retailerjoint[]seer{intuition}titanic$ awk ____________________ jumbled.txtovercoatsfurrowingwaveringjointintuitiontitanic

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用awk模拟命令”paste -sd,”$ cat addr.txtHello WorldHow are youThis game is goodToday is sunny12345You are funny# 将所有行用逗号','拼接起来$ paste -sd, addr.txtHello World,How are you,This game is good,Today is sunny,12345,You are funny# 请确保合并后行尾没有逗号','且行尾有换行$ awk addr.txtHello World,How are you,This game is good,Today is sunny,12345,You are funny$ 如果输入仅有一行，也要确保合并后行尾没有逗号','$ printf 'foo' | paste -sd,foo$ printf 'foo' | awk foo

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为文件scores.csv添加一列，列名为GP，该列的值为数学成绩(权重50%)、物理成绩（权重25%）和化学成绩（权重25%）加权和$ cat scores.csvName,Maths,Physics,ChemistryBlue,67,46,99Lin,78,83,80Er,56,79,92Cy,97,98,95Ort,68,72,66Ith,100,100,100$ awk ____________________ scores.csvName,Maths,Physics,Chemistry,GPBlue,67,46,99,69.75Lin,78,83,80,79.75Er,56,79,92,70.75Cy,97,98,95,96.75Ort,68,72,66,68.5Ith,100,100,100,100

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抽取文件sample.txt中所有包含“do”且只有两行的段落$ cat sample.txtHello WorldGood dayHow are youJust do-itBelieve itToday is sunnyNot a bit funnyNo doubt you like it tooMuch ado about nothingHe he he# 要求输出的尾部不能有多余的空行$ awk '____________________'Just do-itBelieve itMuch ado about nothingHe he he

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