/*
Marty Stepp, CSE 142, Spring 2010
This program reads a file of test scores and shows a histogram of the score
distribution, with a star for each student that got a given score.
It is another example of tallying using an array.

Example input:
94
44
66
93
73
...

Example output:
...
87: ****
88: *
89: *****
90: ********
...
*/

import java.io.*;
import java.util.*;

public class Histogram {
    public static void main(String[] args) throws FileNotFoundException {
        int[] counts = new int[101];     // counters of test scores 0 - 100
        
        Scanner input = new Scanner(new File("midterm.txt"));
        while (input.hasNextInt()) {     // read file into counts array
            int score = input.nextInt();
            counts[score]++;             // if score is 87, then counts[87]++
        }
        
        // print star histogram
        for (int i = 0; i < counts.length; i++) {
            if (counts[i] > 0) {
                // counts[i] stores how many students scored i on the test,
                // so print a star (counts[i]) times
                System.out.print(i + ": ");
                for (int j = 0; j < counts[i]; j++) {
                    System.out.print("*");
                }
                System.out.println();
            }
        }
    }
}