| 发表于：2007-10-30 17:56:19 楼主 |
#include <stdio.h>
#include <iostream>
#include <iomanip>
#include <stdlib.h>
using namespace std;
class base {
static int num;
public:
~base（){cout < < "base des" < <endl; num--; }
base（){cout < < "base con" < <endl; num++; }
void print（){cout < < num < <endl;}
};
class derived :public base {
public: ~derived（) { cout < < "derived des" < <endl;}
derived（) { cout < < "derived con" < <endl;}
};
void fn（base b)
{
cout < < "fn" < < endl;
b.print（);
}
int base::num =0;
int main（void)
{
base b;
derived d;
fn（d);
b.print（);
}
/*
base con
base con
derived con
fn
base des
2
derived des
base des
base des
*/ |
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