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

Difference between digital zoom and optical zoom, Question: (a) What ar...

Question: (a) What are effect presets and how can they be helpful? (b) Explain the difference between digital zoom and optical zoom. (c) Explain exposure in the context o

What is open database connectivity, What is Open Database Connectivity (ODB...

What is Open Database Connectivity (ODBC) It happens that in addition to conventional or most popular database management systems, many companies go for proprietary software c

Explain about semiconductor memories, Q. Explain about Semiconductor Memori...

Q. Explain about Semiconductor Memories? Originally IC technology was used for constructing processor however soon it was realized that same technology can be used for construc

Staircase, What is the aim of a stair case light is controlled by two switc...

What is the aim of a stair case light is controlled by two switches one at the top of the stairs and another at the bottom of the stair

Describe _blank, Q. Describe _blank, _self, _parent and _top tags? Thes...

Q. Describe _blank, _self, _parent and _top tags? These all are attributes of tag. The below example describes each of these attributes. <

C++, What are virtual Functions

What are virtual Functions

What is called network, Network with point-to-point link is known as (...

Network with point-to-point link is known as (A) Fully Connected Network        (B)  Half Connected Network (C)  Duplex Connected Network    (D)  None of these Ans:

How to make frames for web documents, Q. How to make frames for web documen...

Q. How to make frames for web documents? Intelligent use of frames can give your pages a cleaner look and make easier to navigate. The fundamental concept goes like this: Every

Explain the working of a three bit binary ripple counter, With the help of ...

With the help of clocked JK flip flops and waveforms, explain the working of a three bit binary ripple counter. Write truth table for clock transitions. Ans. Three-Bit Binary Rip

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