package edu.princeton.cs.algs4.ch51;
import edu.princeton.cs.introcs.*;
/*************************************************************************
* Compilation: javac Count.java
* Execution: java Count alpha < input.txt
*
* Create an alphabet specified on the command line, read in a
* sequence of characters over that alphabet (ignoring characters
* not in the alphabet), computes the frequency of occurrence of
* each character, and print out the results.
*
* % java Count ABCDR < abra.txt
* A 5
* B 2
* C 1
* D 1
* R 2
*
* % java Count 0123456789 < pi.txt
* 0 99959
* 1 99757
* 2 100026
* 3 100230
* 4 100230
* 5 100359
* 6 99548
* 7 99800
* 8 99985
* 9 100106
*
*************************************************************************/
public class Count {
public static void main(String[] args) {
Alphabet alpha = new Alphabet(args[0]);
int R = alpha.R();
int[] count = new int[R];
String a = StdIn.readAll();
int N = a.length();
for (int i = 0; i < N; i++)
if (alpha.contains(a.charAt(i)))
count[alpha.toIndex(a.charAt(i))]++;
for (int c = 0; c < R; c++)
StdOut.println(alpha.toChar(c) + " " + count[c]);
}
}
/*************************************************************************
* Copyright 2002-2012, Robert Sedgewick and Kevin Wayne.
*
* This file is part of algs4-package.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-package.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-package.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-package.jar. If not, see http://www.gnu.org/licenses.
*************************************************************************/