l8_4.cpp

《C++程序设计教程》-杨国兴-电子教案及例题 C++程序设计PPT课件 html课件 例题

#include "iostream.h"
#include "string.h"
class  A 
{
private:
	char *str;
public:
	A(char *s="no data");
	~A();
	void print();
};
A::A (char *s)
{ 
	int len = strlen(s);
	str = new char[len+1];
	strcpy(str,s);
}
A::~A ()
{ 
	if(str)
		delete []str;
}
void A::print()
{
	cout << str << endl;
}
void main(void)
{
    A *p = new A("AAAA");
	A a1;
	a1=*p;
	a1.print();
	delete p;
	a1.print();
}