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

Calculate the discharge by c program, #include stdio.h #include math.h ...

#include stdio.h #include math.h float discharge(float,float); void main()   {   char prompt;      float time,out,cr;   cr = 100e-6;   for (time = 0;time   {   /* call th

Required audio expert in c# - create audio engine, Project Description: ...

Project Description: We want an EXPERT CODER to help us create an 'audio engine' in C#. We want to be able to specify an input of a wave/MP3 file, and have the engine manipul

Please help to solve a c program, Padovan String Problem Description A P...

Padovan String Problem Description A Padovan string P(n) for a natural number n is defined as: P(0) = ‘X’ P(1) = ‘Y’ P(2) = ‘Z’ P(n) = P(n-2) + P(n-3), n>2 where + denotes s

C program to print character array, Program to print character array : ...

Program to print character array : Write a program to print the character array by using string class functions. void main() {  char line[30];   int i=0;   clrsc

#coding, Smugglers are becoming very smart day by day. Now they have develo...

Smugglers are becoming very smart day by day. Now they have developed a new technique of sending their messages from one smuggler to another. In their new technology, they are send

Explain logical operators, Logical Operators We say any expression that...

Logical Operators We say any expression that evaluates to zero is a FALSE logic condition and that evaluating to non-zero value is a TRUE condition. Logical operators are usefu

Tower of hanoi, application problem of tower of hanoi

application problem of tower of hanoi

Write a program to sort an array of strings, Write a program to sort an arr...

Write a program to sort an array of strings. Use new and delete operators. Write a program to find the factorial of a number using recursion. If we do not accept the number

Default value functions, Default Value Functions,  When declaring a functio...

Default Value Functions,  When declaring a function we can specify a default value for each parameter. This value will be used if that parameter is left blank when calling to the f

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