import java.util.Scanner;

/* YOUR NAME  Loop Hwk #1 Comp 110
 * Assigned: Mon 2/21
 * Due: Fri 2/25 at start of lab
 * You may work together on these problems, but each student
 * must turn in their solution on Sakai.
 * This homework is just practice writing loops in Java.
 * You do not need an Implementation Plan or a Test Plan.
 * Just complete the Java code for each of the methods.
 */

public class LoopHwk1SOLUTION {

	public static void main(String[] args) {

		// Change the name of this method (e.g. question1) to
		// run your code for a different question on this assignment.
		question0();
	}

	/*
	 * Ask the user to "Enter a positive integer" Print out the sum of the first
	 * n odd integers where n is the number entered by the user. For example, if
	 * the user enters 5, print out 25 = 1 + 3 + 5 + 7 + 9
	 */
	public static void question0() {
		Scanner keyboard = new Scanner(System.in);
		System.out.println("Enter a positive integer");
		int n = keyboard.nextInt();

		// Development of solution to question 0 on web page for class 11
	}

	/*
	 * Question 1 Ask the user to enter a string. Print out the characters of
	 * the string one per line followed by the number of characters. For
	 * example, input "cat" produces output c a t 3
	 */
	public static void question1() {
		Scanner keyboard = new Scanner(System.in);
		System.out.println("Enter a string ");
		String input = keyboard.nextLine();

		// Development of solution to question 1 on web page for class 12

	}

	/*
	 * Question 2 Ask the user to enter a string. Print the characters in
	 * reverse order on a single line followed by the number of characters. For
	 * example, input "cat" produces output tac 3
	 */
	public static void question2() {
		Scanner keyboard = new Scanner(System.in);
		System.out.println("Enter a string ");
		String input = keyboard.nextLine();

		int index = input.length() - 1;
		while (index >= 0) {
			System.out.print(input.charAt(index));
			index--;
		}
		System.out.println(" " + input.length());
	}

	/*
	 * Problem - count the number of 'e's in a string Ask the user to enter a
	 * string. Print the number of times the letter 'e' appears in the string.
	 * For example, input "seerer" produces the output the letter e occurs 3
	 * times in seerer
	 */

	/*
	 * Question 3 Count the number of 'e's using a 'while' loop.
	 */
	public static void question3() {
		Scanner keyboard = new Scanner(System.in);
		System.out.println("Enter a string ");
		String input = keyboard.nextLine();

		int index = 0;
		int count = 0;
		while (index < input.length()) {
			if (input.charAt(index) == 'e')
				count++;
			index++;
		}
		System.out.println("e occurred " + count + " times");
	}

	/*
	 * Question 4 Count the number of 'e's using a 'for' loop.
	 */
	public static void question4() {
		Scanner keyboard = new Scanner(System.in);
		System.out.println("Enter a string ");
		String input = keyboard.nextLine();

		int count = 0;
		for (int index = 0; index < input.length(); index++)
			if (input.charAt(index) == 'e')
				count++;
		System.out.println("e occurred " + count + " times");
	}

	/*
	 * Problem - count the number of vowels in a string. Ask the user to enter a
	 * string. Print the number of vowels in the string. Count only aeiou not y.
	 * For example, the input "anapolis" produces output
	 * 
	 * there are 4 vowels in anapolis
	 */

	/*
	 * In questions 5, 6, and 7, you may use any type of loop you wish: while,
	 * do-while, or for
	 */

	/*
	 * Question 5 - count vowels. Use only nested if statements (no compound
	 * conditions)
	 */
	public static void question5() {
		Scanner keyboard = new Scanner(System.in);
		System.out.println("Enter a string ");
		String input = keyboard.nextLine();

		int count = 0;
		for (int index = 0; index < input.length(); index++) {
			if (input.charAt(index) == 'a')
				count++;
			else if (input.charAt(index) == 'e')
				count++;
			else if (input.charAt(index) == 'i')
				count++;
			else if (input.charAt(index) == 'o')
				count++;
			else if (input.charAt(index) == 'u')
				count++;
		}
		System.out.println(count + " vowels found");

	}

	/*
	 * Question 6 - count vowels. Use only one if statement with a compound
	 * condition
	 */

	public static void question6() {
		Scanner keyboard = new Scanner(System.in);
		System.out.println("Enter a string ");
		String input = keyboard.nextLine();

		int count = 0;
		for (int index = 0; index < input.length(); index++) {
			if (input.charAt(index) == 'a' || input.charAt(index) == 'e'
					|| input.charAt(index) == 'i' || input.charAt(index) == 'o'
					|| input.charAt(index) == 'u')
				count++;
		}
		System.out.println(count + " vowels found");
	}

	/*
	 * Question7 - count vowels. Use only chained if statements (no compound
	 * conditions)
	 */
	public static void question7() {
		Scanner keyboard = new Scanner(System.in);
		System.out.println("Enter a string ");
		String input = keyboard.nextLine();

		int count = 0;
		for (int index = 0; index < input.length(); index++) {
			if (input.charAt(index) == 'a')
				count++;
			if (input.charAt(index) == 'e')
				count++;
			if (input.charAt(index) == 'i')
				count++;
			if (input.charAt(index) == 'o')
				count++;
			if (input.charAt(index) == 'u')
				count++;
		}
		System.out.println(count + " vowels found");

	}

}