• 利用链表来实现对员工信息的存储,排序,删除,插入


    这个问题很简单,但是它涉及的面很广,所以很具有学习的意义。

    #include<stdio.h>
    #include<string.h>
    #include<stdlib.h>
    struct Emplyee
    {
        int num;
        char name[20];
        int age;
        struct Emplyee * next;
    };
    void main()
    {
        struct Emplyee * Create();
        void Output(struct Emplyee *);
        struct Emplyee * Sort(struct Emplyee *);
        struct Emplyee * Insert(struct Emplyee *, struct Emplyee *);
        struct Emplyee * Delete(struct Emplyee *, char name[20]);
        struct Emplyee * s = Create();
        Output(s);
        printf("排序后的结果为:
    ");
        s = Sort(s);
        Output(s);
        struct Emplyee my = { 21, "John", 24 };
        printf("插入后的结果为:
    ");
        s = Insert(s, &my);
        Output(s);
        printf("删除后的结果为:
    ");
        s = Delete(s, "John");
        Output(s);
        getchar();
    }
    struct Emplyee * Create()
    {
        struct Emplyee  * s;
        struct Emplyee * p = NULL;
        printf("输入三个员工的名字:
    ");
        for (int i = 0; i < 3; i++)
        {
            s = (struct Emplyee *)malloc(sizeof(struct Emplyee));
            s->num = i;
            gets(s->name);
            s->age = 21 + i;
            if (p == NULL)
            {
                s->next = NULL;
                p = s;
            }
            else
            {
                s->next = p;
                p = s;
            }
        }
        return p;
    }
    void Output(struct Emplyee * sl)
    {
        while (sl)
        {
            printf("工号:%d	姓名:%s	年龄:%d
    ", sl->num, sl->name, sl->age);
            sl = sl->next;
        }
    }
    struct Emplyee * Sort(struct Emplyee * s)
    {
        struct Emplyee  temp, *last, *first, *p = s;
        for (int i = 0; i < 3; i++)
        {
            p = s;
            for (int j = 0; j<i; j++)
            {
                p = p->next;
            }
            first = p;
            struct Emplyee * min = p;
            while (p!= NULL)
            {
                if (p->age <min->age)
                {
                    min = p;
                }
                p = p->next;
            }
            temp = *min;
            min->age = first->age;
            min->num = first->num;
        strcpy(min->name,first->name); first
    ->age = temp.age; first->num = temp.num;
        strcpy(first->name,temp.name); }
    return s; } struct Emplyee * Insert(struct Emplyee * s, struct Emplyee * t) { struct Emplyee * p = NULL; struct Emplyee * q = s; while ((q->age < t->age) && q->next != NULL) { p = q; q = q->next; } if (t->age<=q->age)//说明不是在尾部插入 { if (s == q)//链表是空的 { p = t; p->next = NULL; } else { p->next = t; } t->next = q; } else//说明是在尾部进行插入 { q->next = t; t->next = NULL; } return s; } struct Emplyee * Delete(struct Emplyee * s, char name[20]) { struct Emplyee * p1 = NULL, *p2 = NULL; p1 = s; while ((strcmp(p1->name, name)) && p1->next != NULL) { p2 = p1; p1 = p1->next; } if (!(strcmp(p1->name, name))) { if (p1 == s) { s = p1->next; } else { p2->next = p1->next; } //free(p1);这个可能是编译器的问题,我只要使用,编译器就会提示我触动了断点,而事实上,我并未打任何断点。 } return s; }
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  • 原文地址:https://www.cnblogs.com/JsonZhangAA/p/5250055.html
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