C++链表排序

时间节点2011-04-25 

/****************************************************
 * FileName: sort_list.c
 * Usage: insert to the list_node
 * sort the list
 * **************************************************
 */
#include<stdio.h>
#include<stdlib.h>

struct List
{
    int number;
    struct List *next;
};

typedef struct List Node;
typedef Node *Link;

Link Create_List(Link ead);
Link insert_rank(Link head);
void Print_List(Link head);
void Free_List(Link head);
/*----------------------------------*/
/* main */
/*----------------------------------*/
int main(void)
{
    Link head=NULL;
    head=Create_List(head);
    if(head != NULL) {
        Print_List(head);
        insert_rank(head); /* sort the rank */
        printf("\n======= after ranking the list =======\n");
        Print_List(head);
        Free_List(head);
    }

    return 0;
}

/* Create the list */
Link Create_List(Link head)
{
    Link New=NULL;
    Link Pointer=NULL;
    Link r=NULL;

    head=(Link)malloc(sizeof(Node));
    head->next=NULL;
    r=head;
    if(head == NULL) {
        printf("memory allocate failure!\n");
    }
    New=(Link)malloc(sizeof(Node));
    if(New == NULL){
        printf("memory allocate failure!\n");
    }
    printf("*** Input DataNumber exit for 0 ***\n");
    scanf("%d",&New->number);
    while(New->number != 0){
        r->next=New;
        r=New;
        New=(Link)malloc(sizeof(Node));
        if(New == NULL){
            printf("memory allocate failure!\n");
        }
        scanf("%d",&New->number);
        New->next=NULL;
    }

    return head;
}

Link insert_rank(Link head)
{
    int flag;
    Link L=NULL;
    Link point=NULL;
    Link New=NULL;
    Link q=NULL;
    Link p=NULL;
    Link s=NULL;

    L=head; /* storage the head point */
    for( point=L->next; point!=NULL; ) {
        flag=0;
        q=point->next;
        p=L;
        while( q!=NULL && p!=q ) {
            s=p;
            p=p->next;
            if(q->number < p->number) {
                flag=1;
                New=(Link)malloc(sizeof(Node));
                if(New == NULL){
                    printf("memory allocate failure!\n");
                }
                New->number=q->number;
                New->next=p;
                s->next=New;
                /* delete the node */
                point->next=q->next;
                free(q);
                break;
            }
        }
        if(flag == 1)
            continue;
        else
            point=point->next;
    }
    return head;
}
void Print_List(Link head)
{
    Link Pointer=NULL;
    Pointer=head->next;
    printf("*** Output Data ***\n");
    while(Pointer != NULL) {
        printf("number is: %d\n",Pointer->number);
        Pointer=Pointer->next;
    }
}
void Free_List(Link head）
{
    Link Pointer=NULL;
    while(head != NULL){
        Pointer=head;
        head=head->next;
        printf("Wait...............\n");
        free(Pointer);
    }
}