zoukankan      html  css  js  c++  java
  • awk操作

    创建linux分区时,必须创建swap和根分区
    登陆linux时,一个具有唯一进程Id号的shell将被调用,这个ID是什么? 是PID
    哪个变量是用来定义shell的全局变量的? 是export
    awk while循环:
    { i = 1
    while (i <= $3) {
    printf(" %.2f ", $1 * (1 + $2) ^ i)
    i = i + 1
    }
    }

    awk if循环:
    END { if (n > 0)
    print n, "employees, total pay is", pay,
    "average pay is", pay/n
    else
    print "no employees are paid more than $6/hour"
    }

    awk使输出的结果对齐
    awk '{print}' 3.txt
    { sum = 0 for (i = 1; i <= NF; i = i + 1) sum = sum + $iprint sum}

    BEGIN { FS = " " # make tab the field separator
    printf("%10s %6s %5s %s ",
    "COUNTRY", "AREA", "POP", "CONTINENT")
    }
    { printf("%10s %6d %5d %s ", $1, $2, $3, $4)
    area = area + $2
    pop = pop + $3第二章 AWK 语言 22
    }
    END { printf(" %10s %6d %5d ", "TOTAL", area, pop) }
    如果将 countries 作为输入, 将出将是
    COUNTRY AREA POP CONTINENT
    USSR 8649 275 Asia
    Canada 3852 25 North America
    China 3705 1032 Asia
    USA 3615 237 North America
    Brazil 3286 134 South America
    India 1267 746 Asia
    Mexico 762 78 North America
    France 211 55 Europe
    Japan 144 120 Asia
    Germany 96 61 Europe
    England 94 56 Europe
    TOTAL 25681 2819

  • 相关阅读:
    依赖反转Ioc和unity,autofac,castle框架教程及比较
    webform非表单提交时防xss攻击
    tfs分支操作
    防火墙入站出站规则配置
    前端流程图jsplumb学习笔记
    Js闭包学习笔记
    word中加入endnote
    Rest概念学习
    DRF的版本、认证、权限
    博客园自动生成目录
  • 原文地址:https://www.cnblogs.com/huiandong/p/9431410.html
Copyright © 2011-2022 走看看