The standard console input stream, std::cin.
An input stream is a character sequence device or buffer from which input can be gathered. The standard input stream is usually a keyboard, data file or the output stream from another program. The user of the program can normally decide where standard input may be redirected from when launching the program, typically defaulting to the keyboard.
Use an input file stream (ifstream) to read from a file and an output file stream (ofstream) to write to a file. Both can be found in the <fstream> standard library header.
tang inah nyoh
Output a prompt.Either:Read from standard input (std::cin) to an integer.Or:Read a line from standard input (std::getline()) to a string.Create a string stream (std::stringstream) to read the string.Read from the string stream to an integer.For each integer from 2 to half the entered integer:If the entered integer is divisible by the current integer:The number is not prime.Exit the program.The number is prime.Exit the program.
string s; istream::getline(std::cin, s ); In the above example, s will contain whatever data is extracted from the standard input stream, as a null-terminated string. int x; istream::getline( std::cin, x ); In the above example, x will be non-zero if the standard input stream has a non-zero value. If the input stream is non-numeric, x will be zero.
An input stream is a character sequence device or buffer from which input can be gathered. The standard input stream is usually a keyboard, data file or the output stream from another program. The user of the program can normally decide where standard input may be redirected from when launching the program, typically defaulting to the keyboard.
To read input from standard input.
Printf prints something to the standard output stream, and scanf inputs something from the standard input stream.
Use an input file stream (ifstream) to read from a file and an output file stream (ofstream) to write to a file. Both can be found in the <fstream> standard library header.
You mean read from file/standard input? With function fgets.
tang inah nyoh
Output a prompt.Either:Read from standard input (std::cin) to an integer.Or:Read a line from standard input (std::getline()) to a string.Create a string stream (std::stringstream) to read the string.Read from the string stream to an integer.For each integer from 2 to half the entered integer:If the entered integer is divisible by the current integer:The number is not prime.Exit the program.The number is prime.Exit the program.
read (shell builtin command)
string s; istream::getline(std::cin, s ); In the above example, s will contain whatever data is extracted from the standard input stream, as a null-terminated string. int x; istream::getline( std::cin, x ); In the above example, x will be non-zero if the standard input stream has a non-zero value. If the input stream is non-numeric, x will be zero.
// create an BufferedReader from the standard input stream BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); String currentLine = ""; int total = 0; // read integers System.out.print("Input an integer: "); while (!(currentLine = in.readLine()).equals("")) { int input = 0; try { input = Integer.valueOf(currentLine); total += input; } catch (final NumberFormatException ex) { System.out.println("That was not an integer."); } System.out.print("Input an integer: "); }
input
The C programming language provides many standard library functions for file input and output. These functions make up the bulk of the C standard library header <stdio.h>. The I/O functionality of C is fairly low-level by modern standards; C abstracts all file operations into operations on streams of bytes, which may be "input streams" or "output streams". Unlike some earlier programming languages, C has no direct support for random-access data files; to read from a record in the middle of a file, the programmer must create a stream, seek to the middle of the file, and then read bytes in sequence from the stream.