Question

我尝试创建的脚本将具有两个功能。但是，如果有人可以指导我，我会面临一些错误并感激不尽。

使用基于＆＃34; Price＆＃34;的字段计算利润。和＆＃34;已售出数量＆＃34;。
打印文本文件中的所有内容。

我的BookDB文本文件中的数据格式如下所示。文本文件只包含5个字段，第6个引用利润的字段只能显示而不能保存到文本文件中。我的数据库中的分隔符是＆＃34;：＆＃34;。

Title:Author:Price:Quantity avilable:Quantity Sold
a(Title):b(Author):$1.00(Quantity.avilable):52:248(Quantity Sold)

以下是所需的输出

Title:Author:Price:Quantity Available:Quantity Sold:Profit
A:B:1.00:20:10:$10

现在，我的输出是这样的

Advanced Book Inventory System
    1.) Inventory summary report
    2.) Quit
Enter selection: 1
6) inventory_summary_report
./filesearch.sh: line 17: (40.30

40.80
50.00
55.00
15.00
56.80
89.10
76.00
23.60
12.99
1.00)*(50
10
248): command not found
./filesearch.sh: line 18: BEGIN: command not found
Harry Potter - The Half Blood Prince,J.K Rowling,$40.30,10,50,Harry Potter - The Half 
Blood Prince:J.K Rowling:40.30:10:50
The little Red Riding Hood,Dan Lin,$40.80,20,10,The little Red Riding Hood:
Dan Lin:40.80:20:10

以下是我的编码，如果有人能在编码中告诉我我的错误

#!/bin/bash
clear
function press_enter
{
 echo ""
 echo -n "Press Enter to continue"
 read
 clear
}

  function inventory_summary_report
   {
    echo "1) inventory_summary_report"
    echo ""
    price="$(cat BookDB.txt | cut -d: -f3)"
    sold="$(cat BookDB.txt | cut -d: -f5)"
    sales=$(echo scale=3;"($price)*($sold)" |bc)
    BEGIN { printf "%s,%s,$%s,%s,%s,%s\n" , "Title", "Author", "Price", "Qty Avail", "Qty  Sold", "Total Sales" }
    awk -F':' -v search="$1" '$1 ~ search || $2 ~ search { i++; printf  "%s,%s,$%s,%s,%s,%s\n", $1, $2, $3, $4, $5,$sales} END { printf "%d records found\n", i }'     BookDB.txt
   }

  #Display menu options and wait for selection
    selection=0
    until [ "$selection" = "1" ]; do
     echo ""
     echo ""
     echo "Advanced Book Inventory System"
     echo ""
     echo ""
     echo " 1.) Inventory summary report"
     echo " 2.) Quit"

  echo -n "Enter selection: "
  read selection
   echo ""
   case $selection in
     1 ) inventory_summary_report;press_enter;;
     2 ) break ;;
     * ) tput setf 4;echo "Please enter 1 or 2, ";tput setf 7; press_enter
 esac
 done`

Answer 1

这是礼物。到目前为止，这是我的建议。

#!/bin/bash

clear

function press_enter {
    echo ""
    echo -n "Press Enter to continue. "
    read
    clear
}

function inventory_summary_report {
    awk -F : -v search="$1" '
        BEGIN {
            OFS = "\t"
            print "Title", "Author", "Price", "Qty Avail", "Qty  Sold", "Total Sales"
            count = 0
        }
        $1 ~ search {
            printf "%s\t%s\t$%0.2f\t%s\t%s\t%0.2f\n", $1, $2, $3, $4, $5, ($3 * $5)
            ++count
        }
        END {
            printf "%d records found\n", count
        }
    ' BookDB.txt | column -t  ## Better than relying on constant column sizes with printf.
}

# Display menu options and wait for selection

selection=0

for (( ;; )); do
    echo ""
    echo ""
    echo "Advanced Book Inventory System"
    echo ""
    echo ""
    echo " 1.) Inventory summary report"
    echo " 2.) Quit"
    echo ""
    read -p "Enter selection: " selection
    echo ""
    case "$selection" in
    1)
        inventory_summary_report  ## You're not passing any argument for the search. You probably still need to ask input here.
        press_enter
        break  ## Optional.
        ;;
    2)
        break
        ;;
    *)
        tput setf 4
        echo "Please enter 1 or 2, "
        tput setf 7
        press_enter
        ;;
    esac
done

Answer 2

一般来说，awk需要＆gt;在其文件输出的语法中。所以它可能很简单：

awk -F':' -v search="$1" '$1 ~ search || $2 ~ search { i++; printf  "%s,%s,$%s,%s,%s,%s\n", $1, $2, $3, $4, $5,$sales} END { printf "%d records found\n", i }' > BookDB.txt,

Bash计算从文本文件打印出来

2 个答案: