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

Explain about micro-instruction formats, Q. Explain about Micro-instruction...

Q. Explain about Micro-instruction Formats? Now let's focus on format of a micro-instruction. The two widely used formats employed for micro-instructions are vertical and horiz

Solution of multi-layer ann with sigmoid units, Solution of multi-layer ann...

Solution of multi-layer ann with sigmoid units: Assume here that we input the values 10, 30, 20 with the three input units and from top to bottom. So after then the weighted s

Evaluate fixed execution time, The statement of Gustafson's law can be desc...

The statement of Gustafson's law can be described with the help of an illustration. Let us take a problem, say P, which has to be solved using a parallel computer. Let Ts be the ti

Subtraction of 01000-01001 using 2's complement method, Subtraction of 0100...

Subtraction of 01000-01001 using 2's complement method. Ans. Firstly 1's complement of 01001 is 10110 and 2's complement is 10110+ 1 =10111. Thus   01000 =  01000 - 01001

Initial considerations in problem solving, Initial considerations in proble...

Initial considerations in problem solving: Three initial considerations in problem solving for easiest(as described in Russell and Norvig):  Initial State  First

What is the difference between in two lines of verilog code, What is the di...

What is the difference between the following two lines of Verilog code? #5 a = b; a = #5 b; #5 a = b; Wait five time units before doing the action for "a = b;". Value assig

Explain digital signatures, Digital Signatures. A digital signature is ...

Digital Signatures. A digital signature is an electronic rather than a written signature that can be used by someone to validate the uniqueness of the sender of a message or of

Implementation of a data entry application, Develop and submit an original ...

Develop and submit an original implementation of a data entry application. Identify and declare variables which will hold all data that needs to be entered to fill in the attached

Explain parsing, What is parsing? The target of parsing is to find out...

What is parsing? The target of parsing is to find out the syntactic validity of a source string. A tree is built for use through subsequent phase of compiler, if the string is

What is the efficient data structure used in rdbms, In RDBMS, what is the e...

In RDBMS, what is the efficient data structure used in the internal storage representation? B+ tree. Because in B+ tree, all the data is kept only in leaf nodes, that makes sea

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