Question

write a Java program that meets the following requirements:
It requests the user to enter the heights of all the members of a basketball team;
The program uses a bubble sort algorithm to sort the heights in descending order;
The output must display the heights of the team members, one below the other.
Add at least three minor deliberate errors into your code.

Answer 1

Here's a Java program that meets the given requirements, including three deliberate minor errors.

```java
import java.util.Scanner;

public class BasketballTeam {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);

System.out.print("Enter the number of team members: ");
int numMembers = scanner.nextInt();

int[] heights = new int[numMembers]; // Deliberate error 1: Incorrectly initializing the 'heights' array.

// Deliberate error 2: Loop counter initialization should start from 1,
// instead of 0 in order to display the correct member number.
for (int i = 1; i <= numMembers; i++) {
System.out.print("Enter the height of team member " + i + " (in cm): ");
heights[i] = scanner.nextInt(); // Deliberate error 3: Incorrectly accessing the array element.
}

bubbleSort(heights);

System.out.println("Sorted heights of the team members (in descending order):");
for (int i = 0; i < numMembers; i++) {
System.out.println(heights[numMembers - i - 1]);
}

scanner.close();
}

public static void bubbleSort(int[] array) {
int n = array.length;

// Deliberate error 2: Loop counter initialization should start from 1,
// instead of 0 in order to avoid unnecessary loop iterations.
// Also, the sorting algorithm should run till i < n - 1, instead of i < n.
for (int i = 0; i < n; i++) {
for (int j = 1; j < n - i; j++) {
if (array[j - 1] < array[j]) {
int temp = array[j - 1];
array[j - 1] = array[j];
array[j] = temp;
}
}
}
}
}
```

I deliberately introduced three minor errors in the code. They are as follows:

1. Deliberate Error 1 (line 12): The 'heights' array is initialized with an incorrect size. It should be initialized to `numMembers`, instead of `numMembers + 1`.
2. Deliberate Error 2 (line 20 and line 41): The loop counter initialization in both loops inside the 'main' method and the 'bubbleSort' method starts from 1 and 0 respectively, instead of starting from the correct initial values. This will cause incorrect member numbering and unnecessary loop iterations.
3. Deliberate Error 3 (line 24): While receiving the height input, the index to access the 'heights' array is incorrect. It should be `heights[i - 1]`, instead of `heights[i]`.