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I need help with this Java problem to output as it's explained in this image below:
import java.util.Scanner;
public class LabProgram {
// Read size and create an array of size ints.
// Read size ints, storing them in the array.
// Return the array.
public static int[] readNums() {
Scanner scnr = new Scanner(System.in);
int size = scnr.nextInt(); // Read array size
int[] nums = new int[size]; // Create array
for (int j = 0; j < size; ++j) { // Read the numsbers
nums[j] = scnr.nextInt();
}
return nums; // Return the array
}
// Output the numbers in nums, separated by spaces.
// No space or newline will be output before the first number or after the last.
public static void printNums(int[] nums) {
for (int i = 0; i < nums.length; i++) {
System.out.print(nums[i]);
if (i < nums.length) {
System.out.print(" ");
}
}
}
public static void merge(int[] numbers, int i, int j, int k) {
int mergedSize = k - i + 1;
int mergedNumbers[] = new int[mergedSize];
int mergePos;
int leftPos;
int rightPos;
mergePos = 0;
leftPos = i;
rightPos = j + 1;
while (leftPos <= j && rightPos <= k) {
if (numbers[leftPos] < numbers[rightPos]) {
mergedNumbers[mergePos] = numbers[leftPos];
++leftPos;
}
else {
mergedNumbers[mergePos] = numbers[rightPos];
++rightPos;
}
++mergePos;
}
while (leftPos <= j) {
mergedNumbers[mergePos] = numbers[leftPos];
++leftPos;
++mergePos;
}
while (rightPos <= k) {
mergedNumbers[mergePos] = numbers[rightPos];
++rightPos;
++mergePos;
}
for (mergePos = 0; mergePos < mergedSize; ++mergePos) {
numbers[i + mergePos] = mergedNumbers[mergePos];
}
}
public static void mergeSort(int numbers[], int i, int k) {
int j;
if (i < k) {
j = (i + k) / 2;
/* Trace output added to code in book */
System.out.printf("%d %d | %d %d\n", i, j, j+1, k);
mergeSort(numbers, i, j);
mergeSort(numbers, j + 1, k);
merge(numbers, i, j, k);
}
}
public static void main(String[] args) {
int[] numbers = readNums();
System.out.print("unsorted: ");
printNums(numbers);
System.out.println("\n");
mergeSort(numbers, 0, numbers.length - 1);
System.out.print("\nsorted: ");
printNums(numbers);
}
}
Step by stepSolved in 3 steps with 1 images
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