// CSE 142, Winter 2008, Marty Stepp
// This file can be used to test your solution to a midterm question.

import java.util.*;

public class MidtermTester { 
	public static void main(String[] args) {
		question1();
		question2();
		question3();
		question4();
		question5();
		question6();
	}
	
	
	public static void question1() {
		System.out.println("Question 1 (expressions):");
		System.out.println(4 + 3 * 2 - 1);
		System.out.println(1 + ( 2 + " ( 3 + " + 4 + " 5 ) " ) + 6);
		System.out.println(100 % 30 % 4 + 5 % 2);
		System.out.println(!(1 + 1 >= 2) || 10 / 3 == 3);
		System.out.println(2.0 * 2.2 + -23 / 2 / 2.0);
		System.out.println(10 > 5 && (2 > 3 || 5 <= 4 + 2));
		System.out.println();
	}


	public static void question2() {
		System.out.println("Question 2 (parameter mystery):");

		String knight = "rook";
		String king = "pawn";
		String bishop = "knight";
		String pawn = "queen";
		String rook = bishop;

		chess(knight, king, bishop);
		chess(bishop, knight, king);
		chess(king, pawn, "queen");
		bishop = "king";
		chess("bishop", rook, knight);
		chess(pawn, bishop, bishop);
	}

	public static void chess(String b, String c, String a) {
		System.out.println("A " + a + " and a " + b + " beats a " + c);
	}


	public static void question3() {
		System.out.println();
		System.out.println("Question 3 (while loop mystery):");
		System.out.println(whileMystery(2));
		System.out.println(whileMystery(84));
		System.out.println(whileMystery(4097));
		System.out.println(whileMystery(388));
		System.out.println(whileMystery(23980));
		System.out.println();
	}

	public static int whileMystery(int a) {
		int b = 1;
		int c = 0;
	
		while (b <= a) {
			if (b % 2 == 0) {
				c++;
			}
		
			b = b * 10;
			c++;
		}
	
		return c + 1;
	}

	
	// Can't really test question 4 this way, but here's the code anyway.
	public static void question4() {
		System.out.println("Question 4 (assertions):");
		Random rand = new Random();
		System.out.println(dice(rand));
		System.out.println(dice(rand));
		System.out.println(dice(rand));
		System.out.println();
	}

	// Counts number of "coin tosses" until we get heads 3 times in a row.
	public static int dice(Random rand) {
		int count = 0;
		int even = 0;
	
		// Point A
		while (count < 10 && even < 3) {
			// Point B
			count++;
			int roll = rand.nextInt(6) + 1;
			if (roll % 2 == 0) {
				// Point C
				even++;
		
				// Point D
			}
		}
	
		// Point E
		return count;
	}


	public static void question5() {
		System.out.println("Question 5 (canMakeChange):");
		
		System.out.println("Test cases on the exam sheet:");
		testCanMakeChange( 3,  4,  12);    // true
		testCanMakeChange( 1,  5,  26);
		testCanMakeChange(24,  2,  31);
		testCanMakeChange(87, 19, 134);
		testCanMakeChange( 0,  0,   0);

		testCanMakeChange( 1,  1,   9);    // false
		testCanMakeChange( 2,  7,   8);
		testCanMakeChange( 4,  3,  39);
		testCanMakeChange( 3, 80,  14);
		
		System.out.println("Additional test cases:");
		testCanMakeChange( 3,  1,   8);	   // true
		testCanMakeChange( 3,  1,   9);    // false
		testCanMakeChange( 3,  2,  10);    // true
		testCanMakeChange( 3,  1,   9);    // false
		testCanMakeChange( 7,  1,  11);    // true
		testCanMakeChange( 7,  1,   8);    // true
		testCanMakeChange( 7,  1,  13);    // false
		testCanMakeChange( 2,  4,  11);    // true
		testCanMakeChange( 2,  4,  13);    // false
		testCanMakeChange( 0,  2,  10);    // true
		testCanMakeChange( 1,  2,   7);    // false
		testCanMakeChange(20,  4,  31);    // true
		testCanMakeChange( 3,  9,  24);    // false

		System.out.println();
	}

	public static void testCanMakeChange(int pennies, int nickels, int change) {
		// teacher's solution
		boolean expected = canMakeChangeWorking(pennies, nickels, change);
		
		// your solution
		boolean actual = canMakeChange(pennies, nickels, change);
		
		System.out.printf("canMakeChange(%2d, %2d, %3d) = %s", pennies, nickels, change, actual);
		if (expected == actual) {
			System.out.println(" (pass)");
		} else {
			System.out.println(" (FAIL!!)");
		}
	}
	
	public static boolean canMakeChange(int pennies, int nickels, int cents) {
		// you can replace this code with your solution
		return true;
	}
	
	public static boolean canMakeChangeWorking(int pennies, int nickels, int cents) {
		if (cents % 5 > pennies) {
			return false;
		} else if (pennies + 5 * nickels < cents) {
			return false;
		} else {
			return true;
		}
	}


	public static void question6() {
		System.out.println("Question 6 (meetings):");
		meetings(2, 17);
		meetings(10, 14);
		meetings(7, 3);
	}

	public static void meetings(int hour, int minute) {
		// you can write your solution here
		
	}
}