mirror of https://github.com/fengyuhetao/shell.git
48 lines
858 B
Bash
48 lines
858 B
Bash
#!/bin/bash
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#使用内建变量
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# NF 当前记录的字段个数
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# NR 到目前为止读的记录数量
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#下面的程序在每行开头输出行号，并在最后输出文件的总字段数
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gawk '{ total+=NF; print NR, $0 }END{ print "Total: ", total}'
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gawk 'BEGIN {testing="This is a test"; print testing; testing=45; print testing}'
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#处理数字值
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gawk 'BEGIN{x=4; x= x*2+3; printx}'
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#处理数组
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gawk 'BEGIN{capital["Ill"] = "SprintField"; print capital["Ill"]}'
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#遍历数组变量
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gawk 'BEGIN{
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var["a"] = 1
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var["g"] = 2
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var["m"] = 3
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for( test in var)
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{
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print "Index:",test,"- Value:",var[test]
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}
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}'
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print "------"
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#删除数组变量
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gawk 'BEGIN{
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var["a"] = 1
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var["g"] = 2
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for (test in var)
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{
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print "Index:",test," - Value:", var[test]
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}
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delete var["g"]
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print "----"
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for (test in var)
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{
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print "Index;",test," - Value:", var[test]
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}
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}'
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