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

Corresponding port numbers, A) Around how many entries are there in this fi...

A) Around how many entries are there in this file on your VM? B) Select and list names and corresponding port numbers for four well-liked services listed in this file?

What is loader, What is loader? Loader is a system software which havin...

What is loader? Loader is a system software which having a set of utility programs. It will load the object program to the memory.

State about the data glove, State about the Data Glove  Data glove is u...

State about the Data Glove  Data glove is used to grasp a "virtual" object. The glove is constructed with a series of sensors that detect hand and finger motions. Electromagnet

Explain extended binary coded decimal interchange code, Q. Explain Extended...

Q. Explain Extended Binary Coded Decimal Interchange Code? Extended Binary Coded Decimal Interchange Code (EBCDIC) is a character-encoding format employed by IBM mainframes. It

Find sop expression, A. F(X, Y, Z) = ∑(0, 1, 2, 6, 7) using TRUTH TABLE onl...

A. F(X, Y, Z) = ∑(0, 1, 2, 6, 7) using TRUTH TABLE only B. F(X,Y,Z) = ∑ (4,6,7,8) + D(2,5,11,12) using K-Map 1. Find SOP expression 2. Simplify SOP expression 3. Implem

What is throughput of a system, Throughput of a system is? Ans. "Throug...

Throughput of a system is? Ans. "Throughput" of a system is no. of programs processed by this per unit time.

Data warehouse, 1) Define a job scheduling strategy that will meet business...

1) Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a pict

Explain what is high debugging?, It is helped to recure the bugs. A program...

It is helped to recure the bugs. A program has problem that time this debugging is helped to solve the bugs is simply, this is the method of the recure bugs in the programming lang

Fuzzy logic - artificial intelligence, Fuzzy Logic - artificial intelligenc...

Fuzzy Logic - artificial intelligence: In the above logic, we have been concerned with truth whether propositions and sentences are true. But, with some natural language statem

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