[CODE]#include<iostream>
using namespace std;

void show_bytes(char*, int);
template <class T>
void show_object(const T);

class test
{
int a;
int b;
public:
test(int m=9,int n=10){ a = m; b = n; }
};

int main()
{
test x;
cout<<"object in memory\n";
show_object(x);

system("pause");
return 0;
}

void show_bytes(char*p, int n)
{
ios_base::fmtflags old = cout.setf(ios_base::hex, ios_base::basefield);
cout.setf(ios_base::uppercase);
//hexadecimal format

for(int i=0; i<n; i++)
cout<<int(p[i])<<' ';
cout<<endl;

cout.setf(old,ios_base::basefield);
//restore format
}

template <class T>
void show_object(const T n)
{
show_bytes((char*)&n, sizeof(n));
}[/CODE]

这个例子可以说明一些问题