Computer Programming C: UNIT V: File Operations
Creating, Processing and Updation on Files
C Programming
A data file can be viewed in Several different ways. For example the data file can be viewed directly, using an operating system command such as print or type.
CREATING, PROCESSING AND UPDATION
ON FILES
1. Creating a data file
A
data file must be created before it can be processed. In two ways a stream‒oriented
data file can be created. One is using a text editor or a word processor to
create the file directly. The other method is to write a program that enter
information into the computer system and then write it out to the data file.
When creating a new data file with a specially written program, the approach
generally used is to enter the information from the keyboard and then write it
out to the data file.
A
data file can be viewed in Several different ways. For example the data file
can be viewed directly, using an operating system command such as print or
type. The data file can also be examined using a text editor or a word processor.
2. Processing a data file
A
data file can be altered as it is being processed in most of the data file
application. For example, in customer record processing, it may be desirable to
add new records, to delete existing records, to modify the contents of existing
records, or to rearrange the records.
Consider
for example, the problem of updating the records within a data file. The
approach is to read each record from a data file, update the record as
required, and then write the updated record to the same data file.
Computer Programming C: UNIT V: File Operations : Tag: Computer Science : C Programming - Creating, Processing and Updation on Files
Computer Programming C: UNIT V: File Operations
Under Subject
Computer Programming C
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