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;

};