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

Output, #include void func(int num, b=5) { auto int total=0; static ...

#include void func(int num, b=5) { auto int total=0; static int sum=0; for ( int i=num; i>0 ; i--) total+=i; sum+=total; cout

Flow chart, flow chart for calculating the volume of sphere

flow chart for calculating the volume of sphere

#title.faculty attendance system, how to create database of faculty databas...

how to create database of faculty database......... send me with program

Explain floating literal, Floating  literal They can be written in comm...

Floating  literal They can be written in common decimal as well as scientific notation (floating point representation). By default it is of type double. F, L is applied only to

2, how to do 2, 4, 8 associativity

how to do 2, 4, 8 associativity

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.     #include float start

Program for function in cpp, Question Write a program using c++ for the...

Question Write a program using c++ for the above function , at a= 1000, b=10 -3 ,10 -2 ,10 -4

Bus Connection, how to explain working of bus connection

how to explain working of bus connection

StACK, Q. Explain that how do we implement two stacks in one array A[1..n] ...

Q. Explain that how do we implement two stacks in one array A[1..n] in such a way that neither the stack overflows unless the total number of elements in both stacks together is n.

Reverse digit function, how can i write reverse digit function like writing...

how can i write reverse digit function like writing 1234 and printing 4321

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