53 lines
1.3 KiB
Java
53 lines
1.3 KiB
Java
|
|
||
|
|
|
||
|
|
import edu.princeton.cs.introcs.StdIn;
|
||
|
|
import edu.princeton.cs.introcs.StdOut;
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
* 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]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|