Explain processing a data file, C/C++ Programming

Assignment Help:

Explain Processing A Data File?

Mainly data file applications needs that a data file be altered as it is being processed. For instance in an application involving the processing of customer records it perhaps desirable to add new records to the file either at the end of the file or interspersed among the existing records to delete existing records that to modify the contents of existing records or to rearrange the records and these requirements in turn suggest numerous different computational strategies.

Consider for instance the problem of updating the records within a data file. There are numerous approaches to this problem. Maybe the most obvious approach is to read each record from a data file update the record as necessary and then write the updated record to the same data file. But there are some troubles with this strategy. In particular it is hard to write and read formatted data to the same data file with no disrupting the arrangement of the data items within the file. Furthermore the original set of records may become unapproachable if something goes wrong during the program execution. Another approach is to work with two diverse data files - an old file (a source) and a new file. Every record is read from the old file the updated as necessary and then written to the new file. When each and every one of the records have been updated the old file is deleted or placed into archival storage and the new file renamed. Therefore the new file will become the source for the next round of updates.

 


Related Discussions:- Explain processing a data file

Minimum shelf, At a shop of marbles, packs of marbles are prepared. Packets...

At a shop of marbles, packs of marbles are prepared. Packets are named A, B, C, D, E …….. All packets are kept in a VERTICAL SHELF in random order. Any numbers of packets with thes

Using nested if statement, write a program in c/C++ using nested if stateme...

write a program in c/C++ using nested if statement for calculating the average marks and grades of 5 subjects

Demostrate java and c client server exchaniging, Task 1 Demonstrate a J...

Task 1 Demonstrate a Java client and server exchanging one text message in each direction. Task 2 Demonstrate a C client and server exchanging one text message in each

For loop, write a c++ program for the sum of 10 numbers and print out the a...

write a c++ program for the sum of 10 numbers and print out the average

Area under curve, Write a program to find the area under the curve y = f(x)...

Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve between two points can b

Recursive function, Write a recursive function recursiveMin that takes an i...

Write a recursive function recursiveMin that takes an integer array, a starting subscript and an ending subscript as arguments, and returns the smallest element in the array. The

Computer Science 101, This is what I need help with. "Create a program cre...

This is what I need help with. "Create a program creates an interface allowing the user to select from some other programs I have made one being a money converter and the other ca

A client and a server for an instant messaging system based , Develop a cli...

Develop a client and a server for an instant messaging system based on UDP and IPv4

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd