c++编程思想chapter12，简单的内存管理系统，谁帮我下

#include <stddef.h>
#include <fstream.h>

ofstream out("framis.out");
class Framis
{
char c[10];
static unsigned char pool[];
static unsigned char alloc_map[];
public:
enum { PSIZE = 100 };
Framis() { out << "framis()\n"; };
~Framis() { out << "~framis()...\n"; };
void * operator new (size_t);
void operator delete(void *);
};

unsigned char Framis::pool[PSIZE * sizeof(Framis)];
unsigned char Framis::alloc_map[PSIZE] = { 0} ;

void * Framis::operator new(size_t sz)
{
for(int i = 0; i < PSIZE; i++)
if(!alloc_map[i])
{
out << "using block " << i << "...";
alloc_map[i] = 1;
return pool + (i * sizeof(Framis

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