edu.princeton.cs.algs4.Average Maven / Gradle / Ivy
Show all versions of algorithm Show documentation
package edu.princeton.cs.algs4; /******************************************************************************
* Compilation: javac Average.java
* Execution: java Average < data.txt
* Dependencies: StdIn.java StdOut.java
*
* Reads in a sequence of real numbers, and computes their average.
*
* % java Average
* 10.0 5.0 6.0
* 3.0 7.0 32.0
* [Ctrl-d]
* Average is 10.5
*
* Note [Ctrl-d] signifies the end of file on Unix.
* On windows use [Ctrl-z].
*
******************************************************************************/
/**
* The {@code Average} class provides a client for reading in a sequence
* of real numbers and printing out their average.
*
* For additional documentation, see Section 1.1 of
* Algorithms, 4th Edition by Robert Sedgewick and Kevin Wayne.
*
* @author Robert Sedgewick
* @author Kevin Wayne
*/
public class Average {
// this class should not be instantiated
private Average() { }
/**
* Reads in a sequence of real numbers from standard input and prints
* out their average to standard output.
*
* @param args the command-line arguments
*/
public static void main(String[] args) {
int count = 0; // number input values
double sum = 0.0; // sum of input values
// read data and compute statistics
while (!StdIn.isEmpty()) {
double value = StdIn.readDouble();
sum += value;
count++;
}
// compute the average
double average = sum / count;
// print results
StdOut.println("Average is " + average);
}
}
/******************************************************************************
* Copyright 2002-2018, Robert Sedgewick and Kevin Wayne.
*
* This file is part of algs4.jar, which accompanies the textbook
*
* Algorithms, 4th edition by Robert Sedgewick and Kevin Wayne,
* Addison-Wesley Professional, 2011, ISBN 0-321-57351-X.
* http://algs4.cs.princeton.edu
*
*
* algs4.jar is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* algs4.jar is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with algs4.jar. If not, see http://www.gnu.org/licenses.
******************************************************************************/