C++链表-最简单

struct student

{ 

  long num;

  float score;

  struct student *next;

};

注意：只是定义了一个struct student类型，并未实际分配存储空间。只有定义了变量才分配内存单元。

#include<iostream>
using namespace std;
int main() {
    struct student a,b,c,*head,*p;
    a.num = 99101;
    a.score = 89.5;
    b.num = 99103;
    b.score = 90;
    c.num = 99107;
    c.score = 85;        /*对结点的num和score成员赋值*/
    head = &a;        /*将结点a的起始地址赋给头指针head*/
    a.next = &b;        /*将结点b的起始地址赋给a结点的next成员*/
    b.next = &c;        /*将结点c的起始地址赋给b结点的next成员*/
    c.next = NULL;    /*c结点的next成员不存放其他结点地址*/
    p = head;        /*使p指针指向a结点*/
    do {
        cout<<p->num<<" "<<p->score;    /*输出p指向的结点的数据*/
        p=p->next;    /*使p指向下一结点*/
    } while (p!=NULL);    /*输出完c结点后p的值为NULL*/
    return 0;
}