原型模式

浅克隆：

#include <iostream>
#include <string.h>
#include <stdlib.h>
using namespace std;

class vector{
    private:
        char *name;
        int len;
    public:
        int *p;
        bool changeLength1D(int *&a,int oldLength, int newLength)
        {
            if(newLength < 0){
                printf("输入有误！数组长度不能为负！");
                return false;
            }
            int* temp = new int[newLength];
            int number = std::min(oldLength, newLength);
            std::copy(a, a+number, temp);
            delete [] a;
            a = temp;
            return true;
        }
        vector(const char *Name,int Len)//构造函数
        {
            name=new char[strlen(Name)+1];
            strcpy(name,Name);
            len=Len;
            p = new int[len];
            for(int i=0;i<len;i++){
                p[i] = i;
            }
            cout<<"construct ..."<<endl;
        }
        
        ~vector()
        {
            cout<<"destruct ..."<<len<<endl;
            delete name;
        }
        void dispaly()
        {
            cout<<"name:"<<name<<" len:"<<len<<endl;
        }
        void setLen(int x)
        {
            len=x;
        }

};

int main()
{
        int oldlen = 2,newlen = 6;
        vector v("1",oldlen);
        if(v.changeLength1D(v.p,oldlen,newlen)){
            v.setLen(newlen);
        }
        for(int i=2;i<6;i++)
            v.p[i]=i;

        for(int i=0;i<6;i++)
            cout << v.p[i] << endl;
            
        vector v2 = v;
        for(int i=0;i<6;i++)
            cout << v2.p[i] << endl;
        return 0;
    
}

深克隆：

#include <iostream>
#include <string.h>
#include <stdlib.h>
using namespace std;

class vector{
    private:
        char *name;
        int len;
    public:
        int *p;
        bool changeLength1D(int *&a,int oldLength, int newLength)
        {
            if(newLength < 0){
                printf("输入有误！数组长度不能为负！");
                return false;
            }
            int* temp = new int[newLength];
            int number = std::min(oldLength, newLength);
            std::copy(a, a+number, temp);
            delete [] a;
            a = temp;
            return true;
        }
        vector(const char *Name,int Len)//构造函数
        {
            name=new char[strlen(Name)+1];
            strcpy(name,Name);
            len=Len;
            p = new int[len];
            for(int i=0;i<len;i++){
                p[i] = i;
            }
            cout<<"construct ..."<<endl;
        }
        vector(const vector &v)//拷贝构造函数
        {
            name=new char[strlen(v.name)+1];
            strcpy(name,v.name);
            len=v.len;
            p = v.p;
            cout<<"copy construct ..."<<endl;
        }
        ~vector()
        {
            cout<<"destruct ..."<<len<<endl;
            delete name;
        }
        void dispaly()
        {
            cout<<"name:"<<name<<" len:"<<len<<endl;
        }
        void setLen(int x)
        {
            len=x;
        }

};

int main()
{
        int oldlen = 2,newlen = 6;
        vector v("1",oldlen);
        if(v.changeLength1D(v.p,oldlen,newlen)){
            v.setLen(newlen);
        }
        for(int i=2;i<6;i++)
            v.p[i]=i;

        for(int i=0;i<6;i++)
            cout << v.p[i] << endl;
            
        vector v2 = v;
        for(int i=0;i<6;i++)
            cout << v2.p[i] << endl;
        return 0;
    
}