Assignment 5: The Snake Game
Question 2: Snake Control [2 marks
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ComputerNetworks
| Question 2: Snake Control [2 marks Now use the keyboard to control the motion of the snake. Use the special keyPressed() function. When the user presses the L or D key the snake should turn clockwise, and when the user presses the A or J key the snake should turn counterclockwise. Accept both upper and lowercase letters. The keys do not directly control the snake’s direction. They control how the snake turns. That makes the game more fun (or more annoying, depending on your point of view. Use a simple int variable to keep track of the snake’s current direction (down, left, up, or right, using the values 0 to 3 only. The easiest way to translate this direction into the x and y values needed by the moveSnake function is to use two constant arrays final int X_DIRECTIONS = {0,-1,0,+1}; X change for down, left, upright final int Y_DIRECTIONS = {+1,0,-1,0}; Y change for down, left, upright Note that the four directions are in clockwise order. Question 3: Add Apples [2 marks Add another pair of partially-full arrays to store the position of the apples, including a variable that keeps track of the current number of apples (which will change, starting in Question 4). Define a variable startingApples=5 which controls how many apples should appear at the start of each level. This works exactly the same way that startingLength does, but for apples, not the snake. Unlike the snake, the apples appear at random locations. Define a function int[] randomArray(int n, int max) which will create and return an array of exactly n int values, randomly chosen from the values 0 to max . For example, randomArray(5,3) might return the array {0,3,1,3,2} . Define a function resetApples() which will use randomArray to pick a random set of Download 291.77 Kb. Share with your friends:
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