哪位高手进来指点一下？我的类重载new和delete有问题

[yangyanglei]

#include <iostream>
#include <cstring>
#include <cstddef>
#include <new>
const int maxnames=5;
class Names
{
char name[25];
static char Names::pool[];
static bool Names::inuse[maxnames];
public:
Names (char* s)
{ strncpy(name,s,sizeof(name));}
void* operator new(size_t) throw (bad_alloc);
void operator delete(void*)throw();
void display()
{std::cout<<name<<std::endl;}
};
char Names::pool[maxnames*sizeof(Names)];
bool Names::inuse[maxnames];
void* Names::operator new(size_t) throw(bad_alloc)
{
for(int p=0;p<maxnames;p++)
if(!inuse[p])
{
inuse[p]=true;
return pool+p*sizeof(Names);
}
throw bad_alloc();
}
void Names::operator delete(void* p) throw()
{
if(0!=p)
inuse[((char*)p-pool)/sizeof(Names)]=false;
}
int main()
{
Names* nm[maxnames];
int i;
for(i=0;i<maxnames;i++)
{
std::cout<<std::endl<<"Enter name # "<<i+1<<":";
char name[25];
std::cin>>name;
nm[i]=new Names(name);
}
for(i=0;i<maxnames;i++)
{
nm[i]->display();
delete nm[i];
}
return 0;
}

[lgccaa]

有什么问题啊？描述下
问问题要明确一点，还有就是说明白一点，答问题的可以比较快知道问题的所在和楼主不明白的地方，这样对楼主也比较有益的，经过思考的问题解决了会比较深刻的

[mengde007]

#include <iostream>
#include <cstring>
#include <cstddef>
//#include <new>//既然你要重载，为什么还包含呢，去掉
const int maxnames=5;
class Names
{
char name[25];
static char Names::pool[];
static bool Names::inuse[maxnames];
public:
    Names (char* s)
{ strncpy(name,s,sizeof(name));}
void* operator new(size_t) throw (std::bad_alloc);//标准的
void operator delete(void*)throw();
void display()
{std::cout <<name <<std::endl;}
};
char Names::pool[maxnames*sizeof(Names)];
bool Names::inuse[maxnames];
void* Names::operator new(size_t) throw(std::bad_alloc)
{
	try
	{
		for(int p=0;p <maxnames;p++)
			if(!inuse[p])
			{
				inuse[p]=true;
				return pool+p*sizeof(Names);
			}
	}	
	catch(std::bad_alloc & ba)
	{
		std::cout<<ba.what()<<std::endl;
	}
	return NULL;
}
void Names::operator delete(void* p) throw(std::bad_alloc)
{
if(0!=p)
inuse[((char*)p-pool)/sizeof(Names)]=0;
}
int main()
{
Names* nm[maxnames];
int i;
for(i=0;i <maxnames;i++)
{
std::cout <<std::endl <<"Enter name # " <<i+1 <<":";
char name[25];
std::cin>>name;
nm[i]=new Names(name);
}
for(i=0;i <maxnames;i++)
{
nm[i]->display();
delete nm[i];
}
return 0;
}

//以上程序经过测试，完全通过，楼主可验证

[mengde007]

楼主，结贴给分吧，我可忙了一段时间，呵呵