TheAlgorithms-C-Plus-Plus/sleep sort.c

#include <stdio.h>
#include <windows.h>
#include <process.h>
 
void routine(void *a)
{
    int n = *(int *) a; // typecasting from void to int
 
    // Sleeping time is proportional to the number
    // More precisely this thread sleep for 'n' milliseconds
    Sleep(n);
 
    // After the sleep, print the number
    printf("%d ", n);

void sleepSort(int arr[], int n)
{
    // An array of threads, one for each of the elements
    // in the input array
    HANDLE threads[n];
 
    // Create the threads for each of the input array elements
    for (int i = 0; i < n; i++)
        threads[i] = (HANDLE)_beginthread(&routine, 0,  &arr[i]);
 
    // Process these threads
    WaitForMultipleObjects(n, threads, TRUE, INFINITE);
    return;
}
 
// Driver program to test above functions
int main()
{
    // Doesn't work for negative numbers
    int arr[] = {34, 23, 122, 9};
    int n = sizeof(arr) / sizeof(arr[0]);
 
    sleepSort (arr, n);
 
    return(0);
}