编程练习规范

Question

As part of a programming exercise I received the following:

"Simulator will receive orders from stdin in a simplified ascii format specified later in this document..."

"Input is received from stdin, and is in comma-separated ascii format. You may assume that the input will always be correctly formatted"

Example:

B,100322,5103,7500

This is all about the input mechnism. What i don't understand is the stdin them mention - is that the usual console input by the user, file input etc. ?

Answer 1

Usual console, yes.

In Java, the standard streams are referred to by System.in (for stdin ), System.out (for stdout ), and System.err (for stderr ).

See http://en.wikipedia.org/wiki/Standard_streams for further details

Answer 2

标准输入是控制台System.in （如果未使用System.setIn(InputStream)重新定义）。

Answer 3

I googled stdin and the first match was http://en.wikipedia.org/wiki/Standard_streams which states

The three I/O connections are called standard input (stdin), standard output (stdout) and standard error (stderr)

So I googled stdin java and the first match was http://introcs.cs.princeton.edu/java/stdlib/StdIn.java.html

Which has

// assume Unicode UTF-8 encoding
private static String charsetName = "UTF-8";

// assume language = English, country = US for consistency with System.out.
private static Locale usLocale = new Locale("en", "US");

// the scanner object
private static Scanner scanner = new Scanner(new BufferedInputStream(System.in), charsetName);

You can change the charsetName = "ASCII"