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الموضوع: مساعدة من الخبراء في برمجة هذه المسائل على shell script في نظام لينوكس

  1. #1
    عضوية جديدة
    تاريخ التسجيل
    Nov 2008
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    Lightbulb مساعدة من الخبراء في برمجة هذه المسائل على shell script في نظام لينوكس



    السلام عليكم ورحمة الله أصدقائي الأعضاء أرجو ممن لديه خبرة في برمجة لينوكس ان يساعدني في حل هذه المسائل البرمجية على shell script باستخدام محررات لينوكس
    الشكر مقدما لمن يريد المساعدة والأستفادة
    أخوكم حسان
    هذاه هي المسائل مشكورين :
    Students should understand the table structure and write the programs check_table, row_select and row_delete using bash scripting langauge.

    Table structure

    A table consists of a text file that contains lines. The first line contains information about the table and each of the rest of lines represents a data row.

    The first line structure is as follows:

    table_name:number_of_rows:number_of_fields:fieldna me1,fieldname2,filedname3 ...etc

    - table_name is an alphanumeric string not exceeding 16 characters and does not include the column character ‘:’ nor the space character ‘ ‘. It must be the same as the file name.

    - number_of_rows is a integer with value less than 1000.

    - number_of_fields is a integer with value less than 10.

    - filedname is an alphanumeric string not exceeding 16 characters and not including the space ‘ ‘ nor the comma ‘,’ characters.

    Each data row consists of a series of fields delimited by the comma character’,’. Each row has exactly the same number of fields as all other fields in the table. A field consists of a string of alphanumeric characters, does not exceed 16 characters and does not contain the space character ‘ ‘ nor the comma character ‘,’.

    Example:

    students_info:3:5:std_1st_name,std_last_name,year_ of_birth,sex,program
    amer,salim,1990,m,bit
    samira,rami,1988,f,ise
    lamia,rida,1990,f,ise

    Programs

    1.check_table

    syntax: check_table <table_name>

    Description:

    The program checks the following in order:
    - command syntax
    - table exists.
    - first line syntax is correct.
    - tablename and fieldnames all have correct lengths.
    - Table has correct number of rows.
    - All rows have correct number of fields.

    Output:
    - table <tablename> is good
    - table <tablename> has a a problem
    problem description (first problem encountered)

    example:

    $ check_table students_info
    table students_info is good

    $ check_table student_info1
    table students_info has at least one problem:
    Actual number of rows not equal to the one in the file header.

    2. row_select

    syntax: row_select <field1>,<filed2>,<field3>... from <tablename> where <fileld> eq <vlaue>

    Description:

    The command first checks if the syntax is correct, then checks if tablename exist and all fields exist in the table tablename and that the value is less than 16 characters. It exits on the first error occurrence.

    After checks, the command lists the count of rows that satisfy the where clause and output the their required fields.

    The command assumes that the table structure is good.

    Output:

    - 1st line: n rows (n is the number of rows that matches the where clause).
    - Following lines: field1_value1,field2_value2, ...etc (field values of rows satisfying the where clause).

    example:

    $ row_select std_1st_name:std_last_name from students_info where program eq ise
    2 rows
    samira,rami
    lamia,rida

    3. row_delete
    syntax: row_delete from <tablename> where <field> eq <value>

    Description

    The command first checks if the syntax is correct, then checks if tablename exist and field exists in the table tablename and that the value is less than 16 characters. It exits on the first error occurrence.

    After checks, the command lists the count of rows that satisfy the where clause, delete them from the table and modify the table header.

    Output:

    - n row(s) deleted where n is the number of deleted rows.

    example

    $ row_delete from students_info where program eq bit
    1 row(s) deleted.


  2. #2
    عضو
    تاريخ التسجيل
    Mar 2011
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    الدولة: Palestinian Territory
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    رد: مساعدة من الخبراء في برمجة هذه المسائل على shell script في نظام لينوكس



    إذا كانت واجباً دراسيًّا فلا تتوقع أن يأتي شخص ويحلّها بدلاً عنك! حاول معها كل استطاعتك، وإذا احتجت معلومة في جزئيّة محدّدة فسنساعدك ما استطعنا!
    Abdulrahim Fakhoury -- Palestine Linux Arabs Community Member KDE Arabic Localization Coordinator Arabeyes, Arabic Translation & Localization Community

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