#include<stdio.h>
#include<stdlib.h>
//1. 栈的生长方向
void test01() {
  int a = 10;
  int b = 20;
  int c = 30;
  int d = 40;
  printf("a = %d\n", &a);
  printf("b = %d\n", &b);
  printf("c = %d\n", &c);
  printf("d = %d\n", &d);
  //a的地址大于b的地址，故而生长方向向下
}
//2. 内存生长方向(小端模式)
void test02() {
  //高位字节 -> 地位字节
  int num = 0xaabbccdd;
  unsigned char* p = (unsigned char*)&num;
  //从首地址开始的第一个字节
  printf("%x\n", *p);
  printf("%x\n", *(p + 1));
  printf("%x\n", *(p + 2));
  printf("%x\n", *(p + 3));
}
int main()
{
  test01();
  test02();
  return 0;
}