implement in UNIX like platform such as Ubuntu Linux

Write a complete C program using the pthread_create() system call that sorts a given n-element array of integers in ascending order using the quicksort method. n is a positive integer supplied by the user and the parent thread generates an array of n random integers. The array will be sorted by the child thread The sorted array will be output by the parent thread. Have the parent thread invoke the pthread_join() system call to wait for the child thread to finish the sorting task. Perform necessary error checking to ensure that a positive integer n is passed on the command line