输出结果

#include<iostream>
#include<complex>
using namespace std;
class Base
{
public:
 virtual void f( int iParam)
 {
  cout << "Base::f(int)" << endl;
 };
 virtual void f( double dParam)
 {
  cout << "Base::f(double)" << endl;
 };
};

class Derived: public Base
{
public:
 void f( complex<double> Param)
 {
  cout << "Derived::f(complex)" << endl;
 };
};
int main()
{
 Base   b;
 Derived d;
 Base*   pb = new Derived;
 b.f(1.0);
 d.f(1.0);
 pb->f(1.0);
 delete pb;
 return 0;
}

输出结果：

Base::f(double)

Derived::f(complex)

Base::f(double)