P. 39 Ex. 10.18

// Shavit Borisov
// CW

import java.util.Scanner;

public class StringLastTwoCharacters {

    public static void main(String[] args)

    {
        Scanner in = new Scanner (System.in);

        final int STRING_SIZE = 20;
        String input;
        int counter = 0;

        System.out.printf("Enter a string, %d characters long:\n", STRING_SIZE);
        input = in.nextLine();

        char one = input.charAt(STRING_SIZE - 2);
        char two = input.charAt(STRING_SIZE - 1);

        for(int i = 0; i < STRING_SIZE - 2; i++)
            if((input.charAt(i) == one) && (input.charAt(i + 1) == two))
                counter++;

        System.out.printf("The number of '%c%c' pairs is %d.", one, two, counter);

        in.close();
    }
}