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。
浅克隆：
#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;
}
深克隆：
#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;
}
