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#2
rjsp2017-10-23 10:34
从你的上个帖子中的代码来看，你的老师教的是假C++（会点C，补点儿C++语法，就误以为自己会C++了）
所以我写个真正的C++代码，估计反而不能符合你老师的要求。 略尽人事吧  程序代码：#include <iostream> #include <cstring> class homepage { public: homepage( const char* photo, int height, int width ) try : photo_(new char[strlen(photo)+1]), height_(height), width_(width) { strcpy( photo_, photo ); } catch( ... ) { throw; } homepage( const homepage& obj ) try : photo_(new char[strlen(obj.photo_)+1]), height_(obj.height_), width_(obj.width_) { strcpy( photo_, obj.photo_ ); } catch( ... ) { throw; } homepage( homepage&& obj ) noexcept : photo_(obj.photo_), height_(obj.height_), width_(obj.width_) { obj.photo_ = nullptr; } homepage& operator=( const homepage& obj ) { if( this != &obj ) { delete[] photo_; try { photo_ = new char[strlen(obj.photo_)+1]; } catch( ... ) { throw; } strcpy( photo_, obj.photo_ ); height_ = obj.height_; width_ = obj.width_; } return *this; } homepage& operator=( homepage&& obj ) noexcept { if( this != &obj ) { delete[] photo_; photo_ = obj.photo_; height_ = obj.height_; width_ = obj.width_; obj.photo_ = nullptr; } return *this; } ~homepage() { delete[] photo_; } private: char* photo_; int height_; int width_; friend std::ostream& operator<<( std::ostream& os, const homepage& obj ) { return os << "photo = " << obj.photo_ << ", height = " << obj.height_ << ", width = " << obj.width_; } }; using namespace std; int main( void ) { homepage a = { "a", 1, 2 }; cout << a << endl; homepage a2 = a; cout << a2 << endl; homepage a3 = std::move(a2); cout << a3 << endl; a = a3; cout << a << endl; a = std::move(a3); cout << a << endl; return 0; } |
程序代码：#include "stdafx.h"
#include<iostream>
using namespace std;
class homepage {
private:
char *photo;
int height;
int width;
public:
homepage(char*p, int h, int w)
{}
homepage()
{}
void set(char*p, int h, int w)
{}
homepage(homepage &hp)
{}
void print()const
{
cout << "photo:" << photo<< "," << "height:" << height << "," << "width:" <<width << endl;
}
~homepage()
{
delete homepage;
}
};
homepage::homepage(char*p, int h, int w)
{
photo = p;
height = h;
width = w;
}
int main()
{
return 0;
}
#include<iostream>
using namespace std;
class homepage {
private:
char *photo;
int height;
int width;
public:
homepage(char*p, int h, int w)
{}
homepage()
{}
void set(char*p, int h, int w)
{}
homepage(homepage &hp)
{}
void print()const
{
cout << "photo:" << photo<< "," << "height:" << height << "," << "width:" <<width << endl;
}
~homepage()
{
delete homepage;
}
};
homepage::homepage(char*p, int h, int w)
{
photo = p;
height = h;
width = w;
}
int main()
{
return 0;
}
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