俄罗斯轮盘赌游戏(C++)

/*
游戏的道具是一把左轮手枪，其规则也很简单：在左轮手枪中的 6 个弹槽中随意放入一颗或者多颗子弹，在任意旋转转轮之后，关上转轮。游戏的参加者轮流把手枪对着自己，扣动扳机：中枪或是怯场，即为输的一方；坚持到最后的即为胜者。
*/
#include <iostream>
#include <ctime>
#include <cstdlib>

#define random(a,b) (rand()%(b-a+1)+a)

using namespace std;

struct Link {
    int data;
    Link* next;
};

Link* InitLink(Link*, int);
void ShootP(Link*);
void Display(Link*);

int main()
{
    int n;
    cout << "请输入总人数:" << endl;
    cin >> n;
    Link* head = NULL;
    head = InitLink(head, n);
    ShootP(head);

    system("PAUSE");
    return 0;
}

Link* InitLink(Link* head, int n) {
    head = new Link;
    head->data = 1;
    head->next = NULL;

    Link* temp = head;//head存储首元节点,temp存储head中存储的结构体地址，相当于head的一个分身
    for (int i = 2; i <= n; ++i) {
        Link* list = new Link;
        list->data = i;
        list->next = NULL;

        temp->next = list;
        temp = temp->next;
    }
    temp->next = head;

    return head;
}

void ShootP(Link* head) {
    Link* temp = head;
    srand((int)time(0));

    while (temp->next != head) {
        temp = temp->next;
    }

    while (temp->next != temp) {
        int num = random(1, 6);
        cout << "下一次在开第" << num << "枪时，biubiubiu" << endl;
        while(--num) {
            temp = temp->next;
        }
        cout << "序号为：" << temp->next->data << "被射杀" << endl;
        Link* temp2 = temp->next;//error point 存储当前节点状态，用于下面判断首元节点是否有效
        temp->next = temp->next->next;
        cout << "剩余人为：" << endl;
        if (temp2 == head)//判断是否首元节点被删除
            head = head->next;//更新首元节点
        Display(head);
        /*error point  Display(head)
        此时首元节点改变
        */
    }
    cout << "序号为：" << temp->data << "存活" << endl;
}

void Display(Link* head) {
    Link* temp = head;
    if (temp) {
        while (temp->next != head) {
            cout << temp->data << "->";
            temp = temp->next;
        }
    }
    cout << temp->data;
    cout << endl;
}