定义一个指针如:int*a,或者Node *Liming,要对其使用malloc分配空间后才可以使用
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct
{
int age;
char name[];
}Node;
int main()
{
//freopen("input.txt","r",stdin);
Node *Liming=malloc(sizeof(Node));
int *a=malloc(sizeof(int));
*a=5;
Liming->age=19;
strcpy(Liming->name,"Liming");
printf("%d %s %d",Liming->age,Liming->name,*a);
}