通过交换节点对链接列表进行冒泡排序

给定一个单链列表，通过交换节点使用冒泡排序对其进行排序。

例子：

Input: 10->30->20->5
Output: 5->10->20->30

Input: 20->4->3
Output: 3->4->20

方法：

1. 获取要排序的链接列表
2. 将“气泡排序”应用到此链接列表，在此列表中，在比较两个相邻节点时，将交换实际节点，而不仅仅是交换数据。
3. 打印排序列表

下面是上述方法的实现：

C++

// C++ program to sort Linked List
// using Bubble Sort
// by swapping nodes
  
#include 
using namespace std;
  
/* structure for a node */
struct Node 
{
    int data;
    struct Node* next;
} Node;
  
/*Function to swap the nodes */
struct Node* swap(struct Node* ptr1, struct Node* ptr2)
{
    struct Node* tmp = ptr2->next;
    ptr2->next = ptr1;
    ptr1->next = tmp;
    return ptr2;
}
  
/* Function to sort the list */
int bubbleSort(struct Node** head, int count)
{
    struct Node** h;
    int i, j, swapped;
  
    for (i = 0; i <= count; i++)
    {
  
        h = head;
        swapped = 0;
  
        for (j = 0; j < count - i - 1; j++) 
        {
  
            struct Node* p1 = *h;
            struct Node* p2 = p1->next;
  
            if (p1->data > p2->data)
            {
  
                /* update the link after swapping */
                *h = swap(p1, p2);
                swapped = 1;
            }
  
            h = &(*h)->next;
        }
  
        /* break if the loop ended without any swap */
        if (swapped == 0)
            break;
    }
}
  
/* Function to print the list */
void printList(struct Node* n)
{
    while (n != NULL)
    {
        cout << n->data << " -> ";
        n = n->next;
    }
    cout << endl;
}
  
/* Function to insert a struct Node
at the beginning of a linked list */
void insertAtTheBegin(struct Node** start_ref, int data)
{
    struct Node* ptr1
        = (struct Node*)malloc(sizeof(struct Node));
  
    ptr1->data = data;
    ptr1->next = *start_ref;
    *start_ref = ptr1;
}
  
// Driver Code
int main()
{
    int arr[] = { 78, 20, 10, 32, 1, 5 };
    int list_size, i;
  
    /* start with empty linked list */
    struct Node* start = NULL;
    list_size = sizeof(arr) / sizeof(arr[0]);
  
    /* Create linked list from the array arr[] */
    for (i = 0; i < list_size; i++)
        insertAtTheBegin(&start, arr[i]);
  
    /* print list before sorting */
    cout <<"Linked list before sorting\n";
    printList(start);
  
    /* sort the linked list */
    bubbleSort(&start, list_size);
  
    /* print list after sorting */
    cout <<"Linked list after sorting\n";
    printList(start);
  
    return 0;
}
  
// This code is contributed by
// shubhamsingh10

C

// C program to sort Linked List
// using Bubble Sort
// by swapping nodes
  
#include 
#include 
  
/* structure for a node */
struct Node {
    int data;
    struct Node* next;
} Node;
  
/*Function to swap the nodes */
struct Node* swap(struct Node* ptr1, struct Node* ptr2)
{
    struct Node* tmp = ptr2->next;
    ptr2->next = ptr1;
    ptr1->next = tmp;
    return ptr2;
}
  
/* Function to sort the list */
int bubbleSort(struct Node** head, int count)
{
    struct Node** h;
    int i, j, swapped;
  
    for (i = 0; i <= count; i++) {
  
        h = head;
        swapped = 0;
  
        for (j = 0; j < count - i - 1; j++) {
  
            struct Node* p1 = *h;
            struct Node* p2 = p1->next;
  
            if (p1->data > p2->data) {
  
                /* update the link after swapping */
                *h = swap(p1, p2);
                swapped = 1;
            }
  
            h = &(*h)->next;
        }
  
        /* break if the loop ended without any swap */
        if (swapped == 0)
            break;
    }
}
  
/* Function to print the list */
void printList(struct Node* n)
{
    while (n != NULL) {
        printf("%d -> ", n->data);
        n = n->next;
    }
    printf("\n");
}
  
/* Function to insert a struct Node
   at the beginning of a linked list */
void insertAtTheBegin(struct Node** start_ref, int data)
{
    struct Node* ptr1
        = (struct Node*)malloc(sizeof(struct Node));
  
    ptr1->data = data;
    ptr1->next = *start_ref;
    *start_ref = ptr1;
}
  
// Driver Code
int main()
{
    int arr[] = { 78, 20, 10, 32, 1, 5 };
    int list_size, i;
  
    /* start with empty linked list */
    struct Node* start = NULL;
    list_size = sizeof(arr) / sizeof(arr[0]);
  
    /* Create linked list from the array arr[] */
    for (i = 0; i < list_size; i++)
        insertAtTheBegin(&start, arr[i]);
  
    /* print list before sorting */
    printf("Linked list before sorting\n");
    printList(start);
  
    /* sort the linked list */
    bubbleSort(&start, list_size);
  
    /* print list after sorting */
    printf("Linked list after sorting\n");
    printList(start);
  
    return 0;
}

输出：

Linked list before sorting
5 -> 1 -> 32 -> 10 -> 20 -> 78 -> 
Linked list after sorting
1 -> 5 -> 10 -> 20 -> 32 -> 78 ->