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A programmer is writing a game - AQA - GCSE Computer Science - Question 13 - 2023 - Paper 1

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Question 13

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A programmer is writing a game. The game uses a 3 x 3 grid containing nine squares. In the game, a square on the grid is referred to by a letter and a number. For e... show full transcript

Worked Solution & Example Answer:A programmer is writing a game - AQA - GCSE Computer Science - Question 13 - 2023 - Paper 1

Step 1

use the variable check

96%

114 rated

Answer

Define a boolean variable check and initialize it to false:

bool check = false;

Step 2

while (check == false)

99%

104 rated

Answer

Use a while loop to repeatedly prompt the user:

while (!check) {
    string square = "";
    // Additional logic will follow here
}

Step 3

output an error if a grid reference is entered

96%

101 rated

Answer

Include logic to validate the input:

while (square.Length != 2) {
    Console.Write("Enter grid reference (eg C2): ");
    square = Console.ReadLine();
}

Step 4

confirm that the square is empty or and square reference is not entered

98%

120 rated

Answer

Add conditions to check the validity of the grid reference:

char firstChar = square[0];
char secondChar = square[1];

if ((firstChar == 'A' || firstChar == 'B' || firstChar == 'C') 
    && (secondChar >= '1' && secondChar <= '3')) {
    // Check for empty square logic here
} else {
    Console.WriteLine("Invalid grid reference, try again.");
}
check = true; // End loop if valid

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