原型模式

用C++完成数学中向量的封装，其中，用指针和动态申请支持向量长度的改变，使用浅克隆和深克隆复制向量类，比较这两种克隆方式的异同。

类图

浅克隆

 

#include <iostream>
using namespace std;

class Vector{
private:
    int* xl;
    int len;
public:
    Vector(int len1){
        xl = new int[len]();
        len = len1;
    }
    ~Vector(){}
    Vector(const Vector& fs){
        //浅克隆
        xl = fs.xl;
        len = fs.len;
    }
    void show(){
        int i = 0;
        cout << "向量为:";
        for (i = 0; i < (len - 1); i++){
            cout << xl[i] << ",";
        }
        cout << xl[len - 1] << endl;
    }
    void setXl(){
        int i = 0;
        for (i = 0; i < len; i++){
            cout << "请输入向量的第" << i + 1 << "个值:";
            cin >> xl[i];
        }
        cout << "录入完成!" << endl;
    }
};



int main(){
    cout << "请输入向量的维数:";
    int n;
    cin >> n;
    Vector v1(n);
    Vector v2 = v1;
    v1.setXl();
    cout << "v1:";
    v1.show();
    cout << "v2:";
    v2.show();
    cout << "修改v1" << endl;
    v1.setXl();
    v1.show();
    v2.show();

    return 0;
}

 

 

深克隆

 

 

 

#include <iostream>
using namespace std;

class Vector {
private:
    int* xl;
    int len;
public:
    Vector(int len1) {
        xl = new int[len]();
        len = len1;
    }
    ~Vector() {}
    Vector(const Vector& fs) {
        //深克隆
        int i;
        xl = new int[fs.len]();
        for (i = 0; i < fs.len; i++) {
            xl[i] = fs.xl[i];
        }
        int temp = fs.len;
        len = temp;
    }
    void show() {
        int i = 0;
        cout << "向量为:";
        for (i = 0; i < (len - 1); i++) {
            cout << xl[i] << ",";
        }
        cout << xl[len - 1] << endl;
    }
    void setXl() {
        int i = 0;
        for (i = 0; i < len; i++) {
            cout << "请输入向量的第" << i + 1 << "个值:";
            cin >> xl[i];
        }
        cout << "录入完成!" << endl;
    }
};

    int main() {
        cout << "请输入向量的维数:";
        int n;
        cin >> n;
        Vector v1(n);
        v1.setXl();
        Vector v2 = v1;
        cout << "v1:";
        v1.show();
        cout << "v2:";
        v2.show();
        cout << "修改v1" << endl;
        v1.setXl();
        v1.show();
        v2.show();

        return 0;
    }

 

 

 

运行截图