#include <stdio.h>
#define SIZE sizeof(struct student)
struct student
{
long num;
float score;
struct student *next;
};
struct student * create();
struct student * input();
void print(struct student *);
struct student * union_linktable(struct student *,struct student *);
struct student * insert(struct student *,struct student *);
int main(int argc,char *argv[])
{
struct student *head1,*head2;
printf("please input linktable1:\n");
head1 = (struct student *)create();
printf("the lintable1 data is \n");
print(head1);
printf("please input linktable2:\n");
head2 = (struct student *)create();
printf("the lintable2 data is \n");
print(head2);
printf("union linktable1 and linktable2:\n");
head1 = union_linktable(head1,head2);
print(head1);
system("pause");
return 0;
}
struct student * create()
{
int n = 0;
struct student *head;
struct student *p1,*p2;
head = NULL;
do
{
p1 = input();
if (0 == p1->num)
{
break;
}
else
{
if (0 == n)
{
head = p1;
}
else
{
p2->next = p1;
}
p2 = p1;
n++;
}
}while(1);
p2->next = NULL;
return head;
}
struct student * input()
{
struct student *p;
p = (struct student *)malloc(SIZE);
printf("please input num,score:");
scanf("%ld,%f",&p->num,&p->score);
return p;
}
void print(struct student *head)
{
struct student *p;
p = head;
if (head != NULL)
{
do
{
printf("num:%ld,score:%5.1f\n",p->num,p->score);
p = p->next;
}while(p != NULL);
}
else
{
printf("error:linktable data is NULL.\n");
}
}
struct student * union_linktable(struct student *head1,struct student *head2)
{
struct student *pa1,*pa2,*pb1,*pb2;
pa1 = pa2 = head1;
pb1 = pb2 = head2;
do
{
while ((pb1->num > pa1->num) && (pa1->next) != NULL)
{
pa2 = pa1;
pa1 = pa1->next;
}
if (pb1->num <= pa1->num)
{
if(head1 == pa1)
{
head1 = pb1;
}
else
{
pa2->next = pb1;
}
pb2->next = pa1;
pa2 = pb2;
pb2 = pb1;
}
}while((pa1->next != NULL) || (pa1 == NULL && pb1 != NULL));
if ((pb1 != NULL) && (pb1->num > pa1->num) &&(pa1->next == NULL))
{
pa1->next = pb1;
}
return head1;
}
struct student *insert(struct student *head,struct student *stu)
{
struct student *p0,*p1,*p2;
p1 = head;
p0 = stu;
if(NULL == head)
{
head = p0;
p0->next = NULL;
}
else
{
while (p0->num > p1->num && p1->next != NULL)
{
p2 = p1;
p1 = p1->next;
}
if (p0->num <= p1->num)
{
if (p1 == head)
{
head = p0;
}
else
{
p2->next = p0;
}
p0->next = p1;
}
else
{
p1->next = p0;
p0->next = NULL;
}
}
return head;
}