实验六

[实验任务一]：向量的原型

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。

实验要求：

1.画出对应的类图；

2.提交源代码（用C++完成）；

3.注意编程规范。

 

#include <iostream>
using namespace std;
//向量类
class Vector {
private:
    int* p;
    int len;
public:
    Vector(int len);
    Vector(const Vector& vector);  //拷贝构造函数
    ~Vector();
    int operator[](int i) const { return p[i]; }
    int& operator[](int i) { return p[i]; }
    int length() const { return len; }
};
Vector::Vector(int len) : len(len) {
    p = (int*)calloc(len, sizeof(int));
}
//拷贝构造函数
Vector::Vector(const Vector& vector) {
    this->len = vector.len;
    this->p = vector.p;
}
Vector::~Vector() { free(p); }
//打印
void display(const Vector& vector) {
    int len = vector.length();
    for (int i = 0; i < len; i++) {
        if (i == len - 1) {
            cout << vector[i] << endl;
        }
        else {
            cout << vector[i] << ", ";
        }
    }
}
int main() {
    Vector v1(10);
    for (int i = 0; i < 10; i++) {
        v1[i] = i;
    }
    Vector v2 = v1;
    v2[6] = 55;
    v2[2] = 20;
    cout << "浅克隆：" << endl;
    cout << "更改copyVector后vector的数据：" << endl;
    display(v1);
    cout << "更改copyVector后copyVector的数据：" << endl;
    display(v2);
    return 0;
}

#include <iostream>
using namespace std;
//向量类
class Vector {
private:
    int* p;
    int len;
public:
    Vector(int len);
    Vector(const Vector& vector);  //拷贝构造函数
    ~Vector();
    int operator[](int i) const { return p[i]; }
    int& operator[](int i) { return p[i]; }
    int length() const { return len; }
};
Vector::Vector(int len) : len(len) {
    p = (int*)calloc(len, sizeof(int));
}
//拷贝构造函数
Vector::Vector(const Vector& vector) {
    this->len = vector.len;
    this->p = (int*)calloc(this->len, sizeof(int));
    memcpy(this->p, vector.p, len * sizeof(int));
}
Vector::~Vector() { free(p); }
//打印
void display(const Vector& vector) {
    int len = vector.length();
    for (int i = 0; i < len; i++) {
        if (i == len - 1) {
            cout << vector[i] << endl;
        }
        else {
            cout << vector[i] << ", ";
        }
    }
}
int main() {
    Vector v1(10);
    for (int i = 0; i < 10; i++) {
        v1[i] = i;
    }
    Vector v2 = v1;
    v2[6] = 55;
    v2[2] = 20;
    cout << "深克隆：" << endl;
    cout << "更改copyVector后vector的数据：" << endl;
    display(v1);
    cout << "更改copyVector后copyVector的数据：" << endl;
    display(v2);
    return 0;
}