CircleLinkList(循环链表)

　　尾插法和循环链表。

#include <stdio.h>
#include <stdlib.h>

typedef struct CircleLinkList
{
    int data;
    struct CircleLinkList * next;
}circleLinkList;


int main()
{
    circleLinkList * h, * r, * s;
    circleLinkList * L;
    int n, num;

    printf("请输入参与约瑟夫环的总人数及淘汰者编号:");
    scanf("%d %d",&n,&num);

    h = (circleLinkList *)malloc(sizeof(circleLinkList));
    r = h;
    for(int i = 0; i < n; i++)                    // 尾插法建立链表
    {
        s = (circleLinkList *)malloc(sizeof(circleLinkList));
        s -> data = i + 1;                    // 为参与人员编号
        r -> next = s;                        // 中间过程分配的空间插到尾指针后面
        r = s;
    }

    r -> next = NULL;
    L = h -> next;
    while(L)
    {
        printf("%d ",L -> data);
        L = L -> next;
    }

    r -> next = h -> next;
    L = h -> next;
    while(L -> next != L)
    {
        for(int j = 1; j < num - 1; j++)
        {
            L = L -> next;
        }
        L -> next = L -> next -> next;
        L = L -> next;
    }
    puts("
最终胜利者:");
    printf("%d
",L -> data);

    return 0;
}

　　Output：

　　本段代码其本质都是用第一段代码中的主要方法 尾插法 来建立链表的)：

#include <stdio.h>
#include <stdlib.h>

typedef struct CircleLinkList
{
    int data;
    struct CircleLinkList * next;
}circleLinkList;

int main()
{
    circleLinkList * h = NULL, * p, * q;
    int n , num;

    printf("请输入参与人数及淘汰编号:");
    scanf("%d %d",&n,&num);

    for(int i = 0; i < n; i++)
    {
        p = (circleLinkList *)malloc(sizeof(circleLinkList));
        if(h == NULL)
            h = p;
        else
            q -> next = p;
        p -> data = i + 1;
        p -> next = NULL;
        q = p;
    }

    q -> next = h;//循环条件

    while(h != h -> next)
    {
        for(int i = 1; i < num - 1; i++)
            h = h -> next;
        h -> next = h -> next -> next;
        h = h -> next;
    }
    puts("最终胜利者:");
    printf("%d
",h -> data);

    return 0;
}