Multithreaded Sum Calculation

apple Write a program to calculate the sum of an integer array using multiple threads. Requirements: Divide the array into multiple segments, each thread should calculate the sum of one segment. Set the number of threads reasonably to minimize computation time. Combine the results from all threads to get the final sum. Provide at least three test cases, including: A regular integer array An array containing negative numbers An array of length zero Data scale: The length of the array should not exceed 1000000. Example Input nums = [1, 2, 3, 4, 5] Example Output 15 Example Input 5 1 2 3 4 5