1 #include <stdio.h>
  2 #include <stdlib.h>
  3 typedef struct student *Liststu;
  4 struct student {
  5   int age;
  6   Liststu next;
  7 };
  8 Liststu inset(Liststu stu, int age);
  9 void print(Liststu stu);
 10 Liststu Swap_Data_Sort(Liststu stu);
 11 Liststu Swap_List_Sort(Liststu stu);
 12 Liststu swap(Liststu stu);
 13 int main()
 14 {
 15   Liststu stu;
 16   stu = NULL;
 17   stu = inset(stu, 19);
 18   stu = inset(stu, 26);
 19   stu = inset(stu, 15);
 20   stu = inset(stu, 18);
 21   stu = inset(stu, 25);
 22   stu = inset(stu, 21);
 23   stu = inset(stu, 20);
 24   stu = Swap_List_Sort(stu);
 25   print(stu);
 26   return 0;
 27 }
 28 Liststu inset(Liststu stu, int age) //插入数据(尾插法)
 29 {
 30   Liststu temp, temp1;
 31   temp  = (Liststu)malloc(sizeof(*temp));
 32   temp1 = (Liststu)malloc(sizeof(*temp1));
 33   if(temp == NULL || temp1 == NULL) {
 34     printf("创建失败！");
 35     exit(1);
 36   }
 37   temp1 = stu;
 38   temp->age = age;
 39   if(temp1) {
 40     while(temp1->next != NULL) {
 41       temp1 = temp1->next;
 42     }
 43     temp1->next = temp;
 44     temp->next = NULL;
 45   }
 46   else {
 47     temp->next = NULL;
 48     stu = temp;
 49   }
 50   return stu;
 51 }
 52 void print(Liststu stu)  //打印链表
 53 {
 54   for(; stu; stu = stu->next) {
 55     printf("%d\n", stu->age);
 56   }
 57 }
 58 Liststu Swap_Data_Sort(Liststu stu)  //链表排序(数据交换)
 59 {
 60   int temp;
 61   Liststu p1, p2;
 62   p1 = stu;
 63   while(p1) {
 64     for(p2 = p1->next; p2; p2 = p2->next) {
 65       if(p1->age > p2->age) {
 66         temp = p1->age;
 67         p1->age = p2->age;
 68         p2->age = temp;
 69       }
 70     }
 71     p1 = p1->next;
 72   }
 73   return stu;
 74 }
 75 Liststu Swap_List_Sort(Liststu stu)
 76 {
 77   Liststu p1, p2, temp1, temp2;
 78   p1 = stu;
 79   while(p1) {
 80     for(p2 = p1->next; p2; p2 = p2->next) {
 81       if(p1->age > p2->age) {
 82         temp1 = p1;
 83         temp2 = p2;
 84         p2->next = temp1->next;
 85         p2 = p1;
 86         p1->next = temp2->next;
 87         p1 = temp2;
 88       }
 89     }
 90     p1 = p1->next;
 91   }
 92   return stu;
 93 }
 94 Liststu swap(Liststu stu)  //交换两个节点
 95 {
 96   Liststu p1, p2, temp, prep1, prep2;
 97   p1 = stu->next;
 98   prep1 = stu;
 99   prep2 = p1->next;
100   p2 = prep2->next;
101   temp = p2->next;
102   prep1->next = p2;
103   prep2->next = p1;
104   p2->next = prep2;
105   p1->next = temp;
106   return stu;
107 }