小编Ble*_*rge的帖子

有点像菜鸟所以不要在这里杀了我.

以下代码之间有什么区别？

int *p;         //As i understand, it creates a pointer to an variable of size int.
int *p[100];    //Don't really know what this is.
int (*p)[100];  // I have come to understand that this is a pointer to an array. 

考虑该图对于应用Dijkstra算法是有效的,即没有负边权重.我很难说服自己Dijkstra的算法只有在每轮选择最小距离节点被提取时才有效.什么构成提取除最小距离节点以外的任何东西的证据都会导致Dijkstra算法的失败？我正在寻找一个好的论点,但欢迎支持的例子.

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

struct stud
{
    int age;
    struct stud *next;
};

typedef struct stud node;

node *createlist();
void main()
{
    node *head;

    head = createlist();
}

node *createlist()
{

    node *head, *p;

    head = (node *) malloc(sizeof(node));

    int i, n;

    printf("Enter the number of elements\n");
    scanf("%d", &n);

    for (i = 0; i < n; i++)
    {
        if (i == 0)
        {
            p = head;
        }
        else
        {
            p->next = (node *) malloc(sizeof(node));
            p = p->next;
        }
        p->age = …