无论指针的类型,无论指针是否有指向,指针的大小都是8字节
#include<stdio.h>
#include<stdlib.h>
int main()
{
int *p1;
int *p2;
char *p3;
char *p4;
p2=malloc(4);
*p2=1;
p4="hello world";
printf("%ld %ld\n",sizeof(p1),sizeof(p2));
printf("%ld %ld\n",sizeof(p3),sizeof(p4));
return 0;
}