枚举应用 判断堆的内存增长方向

[root@mip-123456 stack]# cat grow.c
#include <stdio.h>

void* n;

typedef enum
{
  GROW_HIGH,
  GROW_LOW
}STACK;


STACK testStack(void* p)
{
  n=&p;
  if(n==NULL)
     return testStack(n);
  else{
      if(n<p)
        return GROW_HIGH;
       return GROW_LOW;
     }
}

int main()
{
 STACK statck_direct = testStack(NULL);
 printf("%d\n",statck_direct);
 return 0;
}
[root@mip-123456 stack]# ./grow
1