to any print stream object or a function if the argument given is 0xa, what output will this statement generate?
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Guys, does anyone know the answer?
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to any print stream object or a function if the argument given is 0xa what output will this statement generate? – En News
to any print stream object or a function if the argument given is 0xa what output will this statement generate? Approved answer to any print stream object or function, if the given argument is 0xa, what output will this statement generate? c++ - Using stdostream as argument to print function... This, using the stdostream reference […]
to any print stream object or a function if the argument given is 0xa what output will this statement generate?
2023-03-19 09:55
to any print stream object or a function if the argument given is 0xa what output will this statement generate?
Approved answer
to any print stream object or function, if the given argument is 0xa, what output will this statement generate?
c++ - Using stdostream as argument to print function...
This, using the stdostream reference parameter, would allow printing to a file and other things as well. However, the print function is usually not the best way to do this. Instead, you should overload operator<< for stdostream so you can just do cout << my_stack; for instance. – Joseph Mansfield.
Create a print function that takes ostream as an argument...
You're not creating an ostream, you're creating an ostream reference as your assignment question says. And you do this in the parameter list of your print function ie void print(stdostream & os); You can then call this function by passing cout or any other class object derived from ostream (ofstream ostringstream etc.)
Java PrintStream (with examples) - Programmiz
The print stream is associated with the output.txt file. PrintStream output = new PrintStream(output.txt); We used the print() method to print the data to the file. When we run the program, the output.txt file is filled with the following content. This is the text inside the file.
Chapter 12 Maps | Quizlet
Using a PrintWriter reference variable named output that refers to a PrintWriter object, write a statement that flushes any buffered output on the stream associated with the object, frees any system resources associated with the object, and terminates output operations on the associated stream. output.close();
C++ Chapter 5 Flashcards | Quizlet
It is possible to define a file stream object and open the file in a single statement. ANS True 15. In C++ 11, you can pass a string object as an argument to the open member function of a file stream object. ANS True 16 String objects have a member function named c_str that returns the contents of the object formatted as a null-terminated C string. ANS True
Python any() and all() functions - explained with examples
How to use the any() function in Python. Let's understand the syntax of the any() function, let's look at some simple examples and then move on to more useful examples. 👉 The syntax any(iterable) returns True if bool(x) is True for any iterable x. Returns False if iterable is empty.
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The GNU C Library
Go to the first, previous, next, last section, table of contents.
Input/Output on Streams
This chapter describes the functions for creating streams and performing input and output operations on them. As discussed in section Input/Output Overview, a stream is a fairly abstract, high-level concept representing a communications channel to a file, device, or process.
Streams
For historical reasons, the type of the C data structure that represents a stream is called FILE rather than "stream". Since most of the library functions deal with objects of type FILE *, sometimes the term file pointer is also used to mean "stream". This leads to unfortunate confusion over terminology in many books on C. This manual, however, is careful to use the terms "file" and "stream" only in the technical sense.
The FILE type is declared in the header file `stdio.h'.
Data Type: FILE
This is the data type used to represent stream objects. A FILE object holds all of the internal state information about the connection to the associated file, including such things as the file position indicator and buffering information. Each stream also has error and end-of-file status indicators that can be tested with the ferror and feof functions; see section End-Of-File and Errors.
FILE objects are allocated and managed internally by the input/output library functions. Don't try to create your own objects of type FILE; let the library do it. Your programs should deal only with pointers to these objects (that is, FILE * values) rather than the objects themselves.
Standard Streams
When the main function of your program is invoked, it already has three predefined streams open and available for use. These represent the "standard" input and output channels that have been established for the process.
These streams are declared in the header file `stdio.h'.
Variable: FILE * stdin
The standard input stream, which is the normal source of input for the program.
Variable: FILE * stdout
The standard output stream, which is used for normal output from the program.
Variable: FILE * stderr
The standard error stream, which is used for error messages and diagnostics issued by the program.
In the GNU system, you can specify what files or processes correspond to these streams using the pipe and redirection facilities provided by the shell. (The primitives shells use to implement these facilities are described in section File System Interface.) Most other operating systems provide similar mechanisms, but the details of how to use them can vary.
In the GNU C library, stdin, stdout, and stderr are normal variables which you can set just like any others. For example, to redirect the standard output to a file, you could do:
fclose (stdout);
stdout = fopen ("standard-output-file", "w");
Note however, that in other systems stdin, stdout, and stderr are macros that you cannot assign to in the normal way. But you can use freopen to get the effect of closing one and reopening it. See section Opening Streams.
The three streams stdin, stdout, and stderr are not unoriented at program start (see section Streams in Internationalized Applications).
Opening Streams
Opening a file with the fopen function creates a new stream and establishes a connection between the stream and a file. This may involve creating a new file.
Everything described in this section is declared in the header file `stdio.h'.
Function: FILE * fopen
The fopen function opens a stream for I/O to the file filename, and returns a pointer to the stream.
The opentype argument is a string that controls how the file is opened and specifies attributes of the resulting stream. It must begin with one of the following sequences of characters:
`r'
Open an existing file for reading only.
`w'
Open the file for writing only. If the file already exists, it is truncated to zero length. Otherwise a new file is created.
`a'
Open a file for append access; that is, writing at the end of file only. If the file already exists, its initial contents are unchanged and output to the stream is appended to the end of the file. Otherwise, a new, empty file is created.
`r+'
Open an existing file for both reading and writing. The initial contents of the file are unchanged and the initial file position is at the beginning of the file.
`w+'
Open a file for both reading and writing. If the file already exists, it is truncated to zero length. Otherwise, a new file is created.
`a+'
Open or create file for both reading and appending. If the file exists, its initial contents are unchanged. Otherwise, a new file is created. The initial file position for reading is at the beginning of the file, but output is always appended to the end of the file.
As you can see, `+' requests a stream that can do both input and output. The ISO standard says that when using such a stream, you must call fflush (see section Stream Buffering) or a file positioning function such as fseek (see section File Positioning) when switching from reading to writing or vice versa. Otherwise, internal buffers might not be emptied properly. The GNU C library does not have this limitation; you can do arbitrary reading and writing operations on a stream in whatever order.
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Python (Programming Language)
Q1. What is an abstract class?
An abstract class is the name for any class from which you can instantiate an object.
Abstract classes must be redefined any time an object is instantiated from them.
Abstract classes must inherit from concrete classes.
An abstract class exists only so that other "concrete" classes can inherit from the abstract class.
reference
Q2. What happens when you use the build-in function any() on a list?
The any() function will randomly return any item from the list.
The any() function returns True if any item in the list evaluates to True. Otherwise, it returns False.
The any() function takes as arguments the list to check inside, and the item to check for. If "any" of the items in the list match the item to check for, the function returns True.
The any() function returns a Boolean value that answers the question "Are there any items in this list?"
exampleif any([True, False, False, False]) == True:
print('Yes, there is True')
>>> 'Yes, there is True'
Q3. What data structure does a binary tree degenerate to if it isn't balanced properly?
linked list queue set OrderedDict reference
Q4. What statement about static methods is true?
Static methods are called static because they always return None.
Static methods can be bound to either a class or an instance of a class.
Static methods serve mostly as utility methods or helper methods, since they can't access or modify a class's state.
Static methods can access and modify the state of a class or an instance of a class.
reference
Q5. What are attributes?
Attributes are long-form version of an if/else statement, used when testing for equality between objects.
Attributes are a way to hold data or describe a state for a class or an instance of a class.
Attributes are strings that describe characteristics of a class.
Function arguments are called "attributes" in the context of class methods and instance methods.
Explanation Attributes defined under the class, arguments goes under the functions. arguments usually refer as parameter, whereas attributes are the constructor of the class or an instance of a class.Q6. What is the term to describe this code?
count, fruit, price = (2, 'apple', 3.5)
tuple assignment tuple unpacking tuple matching tuple duplication
Q7. What built-in list method would you use to remove items from a list?
.delete() method pop(my_list) del(my_list) .pop() method
examplemy_list = [1,2,3] my_list.pop(0) my_list >>>[2,3]
Q8. What is one of the most common use of Python's sys library?
to capture command-line arguments given at a file's runtime
to connect various systems, such as connecting a web front end, an API service, a database, and a mobile app
to take a snapshot of all the packages and libraries in your virtual environment
to scan the health of your Python ecosystem while inside a virtual environment
reference
Q9. What is the runtime of accessing a value in a dictionary by using its key?
O(n), also called linear time.
O(log n), also called logarithmic time.
O(n^2), also called quadratic time.
O(1), also called constant time.
Q10. What is the correct syntax for defining a class called Game, if it inherits from a parent class called LogicGame?
class Game(LogicGame): pass
def Game(LogicGame): pass
def Game.LogicGame(): pass
class Game.LogicGame(): pass
Explanation: The parent class which is inherited is passed as an argument to the child class. Therefore, here the first option is the right answer.Q11. What is the correct way to write a doctest?
A def sum(a, b): """ sum(4, 3) 7 sum(-4, 5) 1 """ return a + b B def sum(a, b): """ >>> sum(4, 3) 7 >>> sum(-4, 5) 1 """ return a + b C def sum(a, b): """ # >>> sum(4, 3) # 7 # >>> sum(-4, 5) # 1 """ return a + b D def sum(a, b): ### >>> sum(4, 3) 7 >>> sum(-4, 5) 1 ### return a + b
Explanation - use ''' to start the doc and add output of the cell after >>>Q12. What built-in Python data type is commonly used to represent a stack?
set list None dictionary
You can only build a stack from scratch.
Q13. What would this expression return?
college_years = ['Freshman', 'Sophomore', 'Junior', 'Senior']
return list(enumerate(college_years, 2019))
[('Freshman', 2019), ('Sophomore', 2020), ('Junior', 2021), ('Senior', 2022)]
[(2019, 2020, 2021, 2022), ('Freshman', 'Sophomore', 'Junior', 'Senior')]
[('Freshman', 'Sophomore', 'Junior', 'Senior'), (2019, 2020, 2021, 2022)]
[(2019, 'Freshman'), (2020, 'Sophomore'), (2021, 'Junior'), (2022, 'Senior')]
Guys, does anyone know the answer?