EECE 521 Artificial Intelligence521人工智能专业

1、.CSCE 145: Test 1 Key, Spring 2013Questions 1 to 8 are worth 8 points each. Questions 9 to 12 are worth 9 points each.1. What would be the exact result of executing the following statements? int shoeSize = 9; String brand = “Manolo”; int total = shoeSize * 2; /9 System.out.println(“I want “ +brand +

2、“ shoes”); System.out.println(“What size?”); System.out.print(total +”, ”); System.out.println(shoeSize +“ for each foot. HaHa.”);I want Manolo shoesWhat size?18, 9 for each foot. HaHa.2. Suppose the class Dog has the boolean instance variable wagsTail and the setter method setWagsTail with one para

3、meter: a boolean. fido is an object in the class Dog. Write the statement that would cause the wagsTail instance variable for fido to be set to true.fido.setWagsTail(true);3. Assume that int x = 3, int y = 2, and int z = 6. What would be the value of variable b after the following statement is execu

4、ted? boolean b = (x < y) && (x * y / z > z) | (x + y <= z);/ F && F | T => F | T => T _true_4. What would be the value of variable c4 after the following statement is executed? int c4 = 2 * 5 + 4 3 * 2; _8_5. An apple grower has crates that hold 24 apples each. Assume

5、the grower picks n apples. Finish the following Java expression that would find how many apples would be in the last partially filled crate. For example, if he picked 51 apples, he could fill two crates and would have 3 apples left over. int leftOverApples = n % 24;6. What would be the value of vari

6、able total after the following statements are executed? int total = 4; total+; total = total * 5;_25_7. The following code uses a for-loop to compute the value of this sum: n=599n (n-1)int sum = 0;for (int n = 5; n <= 99; n+) sum = sum + n * (n 1);Convert it to an equivalent sum =

7、0;int n = 5;while (n <= 99) sum = sum + n * (n 1); n+;8. Write an int method summation() that has no parameters and returns the value of the summation in problem #12 above. You can use either a for-loop or a while-loop.public int summation() int sum = 0; for (int n = 5; n <= 99; n+) sum = sum

8、+ n * (n 1); return sum;9. What is the output of the following code segment? int i = 5; int j = 7; int k = 6; if (i > j) | (k < 5) System.out.println(“yes 1”); else System.out.println(“no 2”); if (i < j) && (k > 5) System.out.println(“yes 3”); else System.out.println(“no 4”);no 2

9、yes 310. Write the three Java expressions that are equivalent to the following three mathematical formulas: a2+b2 (t2 + 5 t 4) Math.sqrt(a*a + b*b) * (t*t + 5*t 4)(t-5)(t+8)/(2d+e) (t 5) * (t + 8) / (2 * d + e)-b+b2-4ac2a (-b + Math.sqrt(b*b 4*a*c) / (2*a)11. What is the output of the following code

10、 segment? String player1 = “rock”; String player2 = “paper”; if (player1.equals(player2) System.out.println(“Tie!”); else if (player1.equals(“rock”) if (player2.equals(“paper”) System.out.println(“Player 1 loses”); else System.out.println(“Player 1 wins”); else if (player1.equals(“paper”) if (player

11、2.equals(“rock”) System.out.println(“Player 1 wins”); else System.out.println(“Player 1 loses”); else /player1 s if (player2.equals(“rock”) System.out.println(“Player 1 loses”); else System.out.println(“Player 1 wins”); System.out.println(“Player 1 quits”);Player 1 losesPlayer 1 quits16512. Given th

12、e following definition for the classes Room and House, write a method in the House class called getSquareFootage that returns the total square footage of all three rooms in an instance of a House. public class Room private String type; / a variable for storing the type of a / Room, such as “kitchen,” or “bedroom” private int length; / the length of the Room in feet private int width; / the width of the Room in feet /Assume there are getters and setters for the 3 instance /variables above, such as getWidth() and getLength() public class House private Room br1; / bedroom #1 private