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* 当采用冒泡排序时,每一个元素与后一个元素比较,若这个元素小于后一个元素,则交换这两个元素的位置。外层循环n-1次,内循环n-1-i次。
* 首先定义结构体指针stu *p, *q, *tail;
* p = L; 让p指向L,L是首元结点。Int count=0,先循环遍历得到结点个数。也就是上面说的n值。
* 再两次循环即可比较大小
总代码:
#include<stdio.h> typedef struct student { int age; //年龄 struct student *next;
}stu; void BubbleSort(stu* &L) { int i ,count = 0,
num;//count记录链表结点的个数,num进行内层循环, stu *p, *q, *tail;//创建三个指针,进行冒泡排序 p = L;
while(p->next != NULL)//计算出结点的个数 { count++; p = p->next; } for(i = 0; i < count
- 1; i++)//外层循环,跟数组冒泡排序一样 { num = count - i - 1;//记录内层循环需要的次数,跟数组冒泡排序一样, q =
L->next; //令q指向第一个结点 p = q->next;//令p指向后一个结点 tail =
L;//让tail始终指向q前一个结点,方便交换,也方便与进行下一步操作 while(num--)//内层循环 次数跟数组冒泡排序一样 { if(q->age
< p->age)//如果该结点的值大于后一个结点,则交换 { q->next = p->next; p->next = q; tail->next = p;
} tail = tail->next; q = tail->next; p = q->next; } } }