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

public class WordFrequency {

    public static void main(String[] args) {

    }


    // prompts the user for input, and returns it
    public static String getInput(String prompt) {
        Scanner s = new Scanner(System.in);
        System.out.print(prompt);
        String input = s.next();
        return input;
    }

    // given a file name, returns a scanner for that file
    public static Scanner openFile(String filename) {
        Scanner x = null;

        // look at chapter 6.6 to learn about try/catch 
        // statements and exceptions
        try {
            x = new Scanner(new File(filename));
        } catch (Exception e) {
            System.out.println("Failed to open " + filename + ": " + e);
            System.exit(-1);  // terminates the program
        }

        return x;
    }

    // given a file name, opens the file, and returns
    // PrintStream to it
    public static PrintStream writeFile(String filename) {
        PrintStream output = null;

        // look at chapter 6.6 to learn about try/catch
        // statements and exceptions
        try {
            output = new PrintStream(new File(filename));
        } catch (Exception e) {
            System.out.println("Failed to open " + filename + ": " + e);
            System.exit(-1);  // terminates the program
        }
        return output;
    }
}