Which statement opens a file in such a way that information will only be written to its end quizlet?

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Terms in this set [25]

Data stored here disappears once the program stops running or the computer is powered down.

in RAM

In order, the three-step process of using a file in a C++ program involves:

open the file, read/write/save data, close the file

This data type can be used to create files and write information to them but cannot be used to read information from them.

ofstream

This data type can be used to create files, read data from them, and write data to them.

fstream

Which statement opens a file and links it to a file stream object?

file.open["c:\\filename.txt"];

What is true about the following statement?

out.open["values.dat", ios::app];

If the file already exists, its contents are preserved and all output is written to the end of the file.

Which of the following statements opens the file info.txt for both input and output?

dataFile.open["info.txt", ios::in | ios::out];

The ________ marker is the character that marks the end of a file, and is automatically written when the file is closed.

End of File [EOF]

This state bit can be tested to see if the end of an input stream is encountered.

ios::eofbit

This member function reads a single character from a file.

get

This member function can be used to store binary data to a file.

write

To access files from a C++ program, you must use this directive:

#include

To set up a file to perform file I/O, you must declare:

one or more file stream objects

ofstream, ifstream, and fstream are:

data types

This data type can be used to create files and read information from them into memory.

ifstream

Outside of a C++ program, a file is identified by its ________. Inside a C++ program, a file is identified by a ________.

name, file stream object

When used by itself, this access flag causes a file's contents to be deleted if the file already exists.

ios::out

Which statement opens a file in such a way that information will only be written to its end?

dataFile.open["info.dat", ios::out | ios::app];

Closing a file causes any unsaved information still held in the file buffer to be:

saved to the file

The end-of-file marker is automatically written:

when a file is closed

When a file is opened, the file stream object's "read position" is:

at the beginning of the file

All stream objects have these, which indicate the condition of the stream.

error state bits

This state bit is set when an attempted operation has failed.

ios::failbit

This member function writes a single character to a file.

get

This term means non-sequentially accessing information in a file.

random access

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Verified questions

COMPUTER SCIENCE

Write an Employee class that keeps data attributes for the following pieces of information: $$ \begin{matrix} \text{• Employee name}\\ \text{• Employee number}\\ \end{matrix} $$ Next, write a class named ProductionWorker that is a subclass of the Employee class. The ProductionWorker class should keep data attributes for the following information: $$ \begin{matrix} \text{• Shift number [an integer, such as 1, 2, or 3]}\\ \text{• Hourly pay rate}\\ \end{matrix} $$ The workday is divided into two shifts: day and night. The shift attribute will hold an integer value representing the shift that the employee works. The day shift is shift 1 and the night shift is shift 2. Write the appropriate accessor and mutator methods for each class. Once you have written the classes, write a program that creates an object of the ProductionWorker class and prompts the user to enter data for each of the object’s data attributes. Store the data in the object and then use the object’s accessor methods to retrieve it and display it on the screen.

Verified answer

COMPUTER SCIENCE

A certain CS professor gives 5-point quizzes that are graded on the scale 5-A, 4-B, 3-C, 2-D, 1-F, 0-F. Write a program that accepts a quiz score as an input and prints out the corresponding grade.

Verified answer

COMPUTER SCIENCE

Write a program that converts temperatures from Fahrenheit to Celsius.

Verified answer

COMPUTER SCIENCE

This function is used to check whether an object is an instance of a specific class or a subclass of that class. a. isinstance b. isobject c. isreference d. _ _str_ _

Verified answer

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Which file open mode would be used to write data only at the end of an existing file?

Answer: C++ files include information about their structure. 17.4 Q2: Which file open mode would be used to write data only to the end of an existing file? Answer: ios::app.

Which of the following statements opens a file and link it to a file stream object in C++?

Either ofstream or fstream object may be used to open a file for writing. And ifstream object is used to open a file for reading purpose only. Following is the standard syntax for open[] function, which is a member of fstream, ifstream, and ofstream objects.

Which of the following function is used to open a file in C++?

Explanation: C++ allows to use one or more file opening mode in a single open[] method. ios::in and ios::out are input and output file opening mode respectively.

What must be done to a file before data can be written to or read from it?

Creating a File Object and Opening a File. Before data can be written to or read from a file, the following things must happen: A file stream object must be created. The file must be opened and linked to the file stream object.

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