8. Programming
A section of Computer Science, 2210
Listing 10 of 20 questions
A one-player game uses the two-dimensional (2D) array Grid to store the location of a secret cell to be found by the player in 10 moves. Each row and column has 5 cells. Start Grid[1,1] At the start of the game: • The program places an ‘X’ in a random cell (not in Grid[1,1]) and empties all the other cells in the grid. • The player starts at the top left of the grid. • The player has 10 moves. During the game: • The player can move left, right, up or down by one cell and the move must be within the grid. • “You Win” is displayed if the player moves to the cell with ‘X’ and has played 10 moves or less. • “You Lose” is displayed if the player has made 10 moves without finding the ‘X’. Write a program that meets these requirements. You must use pseudocode or program code and add comments to explain how your code works. You do not need to declare any arrays or variables; you may assume that this has already been done. All inputs and outputs must contain suitable messages.
2210_s24_qp_22
THEORY
2024
Paper 2, Variant 2
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A wood flooring company stores the names of up to 100 customers in a one‑dimensional (1D) array Customers. A two‑dimensional (2D) array Quotations stores details of each customer’s quotation: • length of room (one decimal place) • width of room (one decimal place) • area of wood required (rounded up to next whole number) • choice of wood index (whole number) • price of wood required in dollars (two decimal places). The floor measurements (room length and room width) are taken in metres. All floors are rectangles and room measurements must be between 1.5 and 10.0 inclusive. The index of any customer’s data is the same in both arrays. For example, a customer named in index 4 of Customers corresponds to the data in index 4 of Quotations The wood choices available are: Index Wood type Price per square metre ($) Laminate 29.99 Pine 39.99 Oak 54.99 The data are stored in two 1D arrays named WoodType and Price. The index of the wood type and price in their arrays share the same index number. Write a program that meets the following requirements: • input a new customer’s name, room length and room width • check that each measurement is valid • output an error message and require the measurement to be re‑entered until it is valid • calculate the area of the room by multiplying together the length of the room and the width of the room • input the choice of wood and find its price per square metre • calculate the price of the wood needed • store all data in the relevant array • output the customer’s quotation to include: the name of the customer, the choice of wood and the calculated price of the wood required • continue to accept the next customer. You must use pseudocode or program code and add comments to explain how your code works. You do not need to declare any arrays or variables; you may assume that this has already been done. You will need to initialise WoodType and Price All inputs and outputs must contain suitable messages.
2210_w23_qp_22
THEORY
2023
Paper 2, Variant 2
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An incomplete algorithm has been written in pseudocode to count the number of values stored in an array and to find their average. Values have been stored in the array starting at A All the values to be counted are non-zero. A value of zero in the array indicates there are no more values stored. 01 DECLARE A : ARRAY[1:50] OF INTEGER 02 DECLARE C : INTEGER 03 DECLARE W : INTEGER 04 DECLARE X : INTEGER 05 W 06 C 07 WHILE A <> 0 08 W 09 C C + 1 10 ENDWHILE 11 X Complete the given pseudocode algorithm. Write pseudocode to display, with suitable messages: • the number of values stored in the array • the average of those values stored. Meaningful identifiers have not been used in this algorithm. Suggest suitable meaningful identifiers for: The array A The variables C X W
2210_w24_qp_23
THEORY
2024
Paper 2, Variant 3
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Questions Discovered
20