9-10.cpp

能理解C++中运算符重载的需要性

#include <iostream.h>

double* fn(const double* pd)
{
	static double ad=32;
	ad+=*pd;
	cout<<"fn being called...the value is:"<<*pd<<endl;
	return &ad;
}

void main()
{
	double a=345.6;
	const double* pa=fn(&a);
	cout<<*pa<<endl;
	a=55.5;
    pa=fn(&a);
	cout<<*pa<<endl;
}