单链表表的合并（C语言描述）
```language
#include
#define OK 1
#define ERROR 0
typedef int ElemType;
typedef int Status;
// 定义单链表
typedef struct LNode
{
ElemType data;
struct LNode *next;
}*LinkList;
//初始化单链表
Status InitList(LinkList &L)
{
L = new LNode;
L->next = NULL;
return OK;
}
//尾插法创建单链表
void CreateList(LinkList &L, int n)
{
LinkList p,mei;
L = new LNode;
L->next = NULL;
mei = L;
for (int i = 1; i <= n; ++i)
{
p = new LNode;
printf("请输入第%d个元素: ", i);
scanf_s("%d", &p->data);
p->next = NULL;
mei->next = p;
mei = mei->next;
}
}
//根据下标查找元素
Status GetElem(LinkList L, int i, ElemType &e)
{
LinkList p;
int j = 1;
p = L->next;
while (p && j < i)
{
p = p->next;
++j;
}
if (!p || j > i)
{
//printf("下标%d元素没有找到\n", i);
return ERROR;
}
e = p->data;
//printf("下标%d的元素是%d\n", i, e);
return e;
}
//根据给定元素查单链表
Status LocateElem(LinkList L, ElemType e)
{
LinkList p;
p = L->next;
int j = 1;
while (p && p->data != e)
{
p = p->next;
++j;
}
if (!p)
{
//printf("没有找到元素%d\n", e);
return ERROR;
}
//printf("元素%d的下标是%d\n", e, j);
return OK;
}
//尾插法
Status ListInsert(LinkList &L, ElemType e)
{
LinkList p;
p = L;
int j = 0;
while (p->next != NULL )
{
p = p->next;
//++j;
}
LinkList s;
s = new LNode;
s->data = e;
s->next = NULL;
p->next = s;
return OK;
}
//链表合并
void Union(LinkList &LA, LinkList &LB, int n, int m)
{
int e, a;
for (int i = 1; i <= n; i++)
{
e = GetElem(LB, i, e);
a = LocateElem(LA, e);
if (a != 1)
ListInsert(LA, e);
}
}
//打印单链表
void PrintList(LinkList L)
{
LinkList p;
p = L->next;
while (p)
{
printf("%d ", p->data);
p = p->next;
}
printf("\n");
}
int main()
{
int m, n, e = 888;
LinkList LA, LB;
InitList(LA);
InitList(LB);
printf("请输入LA元素个数m: ");
scanf_s("%d", &m);
CreateList(LA, m);
PrintList(LA);
printf("请输入LB元素个数n: ");
scanf_s("%d", &n);
CreateList(LB, n);
PrintList(LB);
Union(LA, LB, n, m);
PrintList(LA);
}
```
运行结果如下所示：
