創建一個結點個數爲n的鏈表，刪除指定的元素

#include <stdio.h>
#include <malloc.h>

typedef struct node
{
    int date;
    struct node *next;

}NODE;

NODE *create()
{
    int a;
    int n;

    NODE *head;
    NODE *p;
    NODE *q;

    head = (NODE*)malloc(sizeof(NODE));
    q = head;
    printf("\n輸入單鏈表的長度值 n:\n");
    scanf("%d",&n);
    if(n > 0)
    {
        printf("輸入單鏈表的(%d) 個元素",n);
        while(n > 0)
        {
            scanf("%d",&a);
            p = (NODE*)malloc(sizeof(NODE));
            p -> date = a;
            q -> next = p;
            q = p;
            n--;
        }
    }
    q -> next = NULL;
    return(head);
   
}

void delete(NODE*head,int x)
{
    NODE *p;
    NODE *q;
    q = head;
    p = q -> next;

    while((p != NULL) && (p -> date != x) )
    {
        q = p;
        p = p -> next;
    }
    if(p == NULL)
    {
        printf("%d 不存在\n",x);
    }
    else
    {
        q -> next = p -> next;
        free(p);
    }
}

int main()
{
    int x;
   
    NODE *a;
    NODE *b;
   
    a = create();
    printf("要刪除的元素:\n");
    scanf("%5d",&x);
   
    delete(a,x);
    b = a;
    b = b->next;
    printf("輸出刪除後的單鏈表:");
    while(b != NULL)
    {
        printf("%5d",b->date);
        b = b->next;
    }
    printf("\n");
    return 0;
}