拷贝构造 赋值构造

#include <iostream>

using namespace std;

class CA

{

	public:

	CA(int b, char *cstr)

	{

	a = b;

	str = new char[b];

	strcpy(str, cstr);

	}

	CA(const CA& Other)

	{

	a = Other.a;

	str = new char[a];

	if(str!=0)

	strcpy(str,Other.str);	

	}

	CA & operator = (CA & Other)

	{

	if(this == &Other)

	return *this;

	a = Other.a;

	delete []str;

	str = new char[a];

	strcopy(str, cstr);

	return this;

	}

	~CA()

	{

	delete str;

	}

	private:

	int a;

	char *str;

};