What is meant by opening a data file, Computer Engineering

Assignment Help:

What is meant by opening a data file

A data file is a file that can be read from or written to. Data files are particularly useful when large amounts of data are involved. Each line of a data file is called a record. The following is the first few records of the file ospots.dat (a file containing the total number of sunspots observed in a year during the years 1850-1975):

1850 66.6

1851 64.5

1852 54.1

1853 39.0

1854 20.6

To read from or write to a data file during the execution of a program, the file must first be opened with the function  "fopen". This function takes two arguments - the first one is the path to your file, including the filename. So if your file sits in the same directory as your C source file, you can simply enter the filename in here .   The second argument is another char *, and determines how the file is opened by your program. Finally, fopen returns a FILE pointer if the file was opened successfully, else it returns NULL.

 

 


Related Discussions:- What is meant by opening a data file

Where engaged tone is generated, E ngaged tone is generated in the: (...

E ngaged tone is generated in the: (A)  Telephone instrument of calling subscriber (B)  Telephone instrument of called subscriber (C)  Exchange (D)  Repeater

What is shadow mask, Q. What is Shadow Mask? Shadow Mask is a metal she...

Q. What is Shadow Mask? Shadow Mask is a metal sheet that has fine perforations (holes) in it and is situated a short distance before phosphor coated screen. The Phosphor dots

Show synchronous mode for point-to-point message passing, Q. Show Synchrono...

Q. Show Synchronous mode for point-to-point message passing? Synchronous mode: Transmitting can be started whether or not matching receive has been started, but transmitting w

Trusted publisher, State the criteria which a trusted publisher should meet...

State the criteria which a trusted publisher should meet before adding him? Ans) The following criteria should be met by the publisher before adding him to the list. ? The

What are the different types of distributing frames, What are the different...

What are the different types of distributing frames used in exchanges? The various distribution frames used in exchange are demonstrated in figure. Every subscriber in a telep

Explain the processor-memory interconnection network (pmin), Processor-Memo...

Processor-Memory Interconnection Network (PMIN): It's a switch which attaches several processors to distinct memory modules. Connecting each processor to every memory module in

Architecture of world wide web with the basic entities, Explain architectur...

Explain architecture of World Wide Web with the basic entities. The architecture of the World Wide Web, demonstrated below, is the one of clients, as like Netscape, Lynx or Int

What is asp.net authentication providers and iis security, What is ASP.NET ...

What is ASP.NET Authentication Providers and IIS Security? ASP.NET implements authentication using authentication providers, which are code modules that verify credentials and

How to work in dreamweaver?, HOW TO WORK IN DREAMWEAVER? How and Where ...

HOW TO WORK IN DREAMWEAVER? How and Where to open Dreamweaver? Step 1: Click on Start Step 2: Select Program Step 3: Select Macromedia Dreamweaver Step 4: Click on

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