实验三

任务一

#pragma once
#include <iostream>
using std::cout;
using std::endl;
class Point {
public:
Point(int x0 = 0, int y0 = 0);
~Point() = default;
int get_x() const;
int get_y() const;
void show() const;
void move(int new_x, int new_y);
private:
int x, y;
};
Point::Point(int x0, int y0): x{x0}, y{y0} {
}
int Point::get_x() const {
return x;
}
int Point::get_y() const {
return y;
}
void Point::show() const {
cout << "(" << x << ", " << y << ")" << endl;
}
void Point::move(int new_x, int new_y) {
x = new_x;
y = new_y;
}

#include "vectorPoint.hpp"
#include <iostream>
void output(const vectorPoint &v) {
for(auto i = 0; i < v.get_size(); ++i)
v.at(i).show();
}
void test() {
using namespace std;
int n;
cout << "输入vectorPoint对象中元素个数: ";
cin >> n;
vectorPoint x(n);
cout << "x对象中所有点坐标信息: " << endl;
output(x);
vectorPoint y(x);
cout << "\ny对象中所有点坐标信息: " << endl;
复制代码
 

t {
cout << "(" << x << ", " << y << ")" << endl;}
void Point::move(int new_x, int new_y) {
x = new_x;
y = new_y;}

 

 

任务二

#pragma once
#include <iostream>
using std::cout;
using std::endl;
class Point {
public:
Point(int x0 = 0, int y0 = 0);
~Point() = default;
int get_x() const;
int get_y() const;
void show() const;
void move(int new_x, int new_y);
private:
int x, y;
};
Point::Point(int x0, int y0): x{x0}, y{y0} {
}
int Point::get_x() const {
return x;
}
int Point::get_y() const {
return y;
}
void Point::show() const {
cout << "(" << x << ", " << y << ")" << endl;
}
void Point::move(int new_x, int new_y) {
x = new_x;
y = new_y;
}

#pragma once
#include "point.hpp"
#include <cassert>
#include <iostream>
class vectorPoint{
public:
vectorPoint(int n);
~vectorPoint();
int get_size() const; // 获得当前动态数组内元素个数
Point& at(int index); // 返回下标为index的元素引用
Point& at(int index) const; // 返回下标为index的元素const引用
private:
int size; // 动态数组的大小
Point *ptr;
};
vectorPoint::vectorPoint(int n) : size{n} {
ptr = new Point[n];
}
vectorPoint::~vectorPoint() {
delete[] ptr;
}
int vectorPoint::get_size() const {
return size;
}
Point& vectorPoint::at(int index) {
assert(index >= 0 && index < size); // 宏，在测试模式下工作。如果不满足条件，
则程序终止
return ptr[index];
}
Point& vectorPoint::at(int index) const {
assert(index >= 0 && index < size);
return ptr[index];
}

#include "vectorPoint.hpp"
#include <iostream>
// 输出vectorPoint对象内的所有数据
void output(const vectorPoint &v) {
for(auto i = 0; i < v.get_size(); ++i)
v.at(i).show();
}
// 测试vectorPoint类：构造对象、复制构造对象
void test() {
using namespace std;
int n;
cout << "输入vectorPoint对象中元素个数: ";
cin >> n;
vectorPoint x(n);
cout << "x对象中所有点坐标信息: " << endl;
output(x);
vectorPoint y(x);
cout << "\ny对象中所有点坐标信息: " << endl;
output(y);
cout << "\n更新x对象中点坐标信息......" << endl;
x.at(0).move(30, 50);
x.at(1).move(-1, -1);
cout << "x对象中所有点坐标信息: " << endl;
output(x);
cout << "\ny对象中所有点坐标信息: " << endl;
output(y);
}
int main() {
test();
}

 

任务三

#pragma once
#include "point.hpp"
#include <cassert>
#include <iostream>
class vectorPoint{
public:
vectorPoint(int n);
vectorPoint(const vectorPoint &vp);
~vectorPoint();
int get_size() const; // 获得当前动态数组内元素个数
Point& at(int index); // 返回下标为index的元素引用
Point& at(int index) const; // 返回下标为index的元素const引用
private:
int size; // 动态数组的大小
Point *ptr;
};
vectorPoint::vectorPoint(int n) : size{n} {
ptr = new Point[n];
}
vectorPoint::vectorPoint(const vectorPoint &vp): size{vp.size}, ptr{new
Point[size]} {
for(auto i = 0; i < size; ++i)
ptr[i] = vp.ptr[i];
}
vectorPoint::~vectorPoint() {
delete[] ptr;
}
int vectorPoint::get_size() const {
return size;
}
Point& vectorPoint::at(int index) {
assert(index >= 0 && index < size); // 宏，在测试模式下工作。如果不满足条件，
则程序终止
return ptr[index];
}
Point& vectorPoint::at(int index) const {
assert(index >= 0 && index < size);
return ptr[index];
}

#pragma once
#include "point.hpp"
#include <cassert>
#include <iostream>
class vectorPoint{
public:
vectorPoint(int n);
vectorPoint(const vectorPoint &vp);
~vectorPoint();
int get_size() const; // 获得当前动态数组内元素个数
Point& at(int index); // 返回下标为index的元素引用
Point& at(int index) const; // 返回下标为index的元素const引用
private:
int size; // 动态数组的大小
Point *ptr;
};
vectorPoint::vectorPoint(int n) : size{n} {
ptr = new Point[n];
}
vectorPoint::vectorPoint(const vectorPoint &vp): size{vp.size}, ptr{new
Point[size]} {
for(auto i = 0; i < size; ++i)
ptr[i] = vp.ptr[i];
}
vectorPoint::~vectorPoint() {
delete[] ptr;
}
int vectorPoint::get_size() const {
return size;
}
Point& vectorPoint::at(int index) {
assert(index >= 0 && index < size); // 宏，在测试模式下工作。如果不满足条件，
则程序终止
return ptr[index];
}
Point& vectorPoint::at(int index) const {
assert(index >= 0 && index < size);
return ptr[index];
}

#include "vectorPoint.hpp"
#include <iostream>
// 输出vectorPoint对象内的所有数据
void output(const vectorPoint &v) {
for(auto i = 0; i < v.get_size(); ++i)
v.at(i).show();
}
// 测试vectorPoint类：构造对象、复制构造对象
void test() {
using namespace std;
int n;
cout << "输入vectorPoint对象中元素个数: ";
cin >> n;
vectorPoint x(n);
cout << "x对象中所有点坐标信息: " << endl;
output(x);
vectorPoint y(x);
cout << "\ny对象中所有点坐标信息: " << endl;
output(y);
cout << "\n更新x对象中点坐标信息......" << endl;
x.at(0).move(30, 50);
x.at(1).move(-1, -1);
cout << "x对象中所有点坐标信息: " << endl;
output(x);
cout << "\ny对象中所有点坐标信息: " << endl;
output(y);
}
int main() {
test();
}

 

任务四

#include <iostream>
using namespace std;
// 函数声明
void swap1(int &rx, int &ry); // 引用作为形参
void swap2(int *px, int *py); // 指针作为形参
void print(int x, int y); // 普通变量作为形参
// 测试代码
void test() {
int x = 3, y = 4;
print(x, y);
swap1(x, y); // 函数调用，注意：引用作为形参时，实参形式
print(x, y);
cout << endl;
x = 3, y = 4;
print(x, y);
swap2(&x, &y); // 函数调用，注意：指针作为形参时，实参形式
print(x, y);
}
int main() {
test();
}
// 函数定义：交换两个变量（引用变量作为形参）
void swap1(int &rx, int &ry) {
int t;
t = rx; rx = ry; ry = t;
}
// 函数定义：交换两个变量（指针变量作为形参）
void swap2(int *px, int *py) {
int t;
t = *px; *px = *py; *py = t;
}
// 函数定义：输出两个变量（普通变量作为形参）
void print(int x, int y) {
std::cout << "x = " << x << ", y = " << y << "\n";
}

 

#include <iostream>
#include <typeinfo>
using namespace std;
int main() {
int a;
int &ra = a;
ra = 4;
int *pa = &a;
*pa = 5;
// 以十六进制形式输出普通变量a, 引用变量ra，指针变量pa的地址
cout << "&a = " << hex << &a << endl;
cout << "&ra = " << hex << &ra << endl;
cout << "&pa = " << hex << &pa << "\n\n";
// 输出普通变量a, 引用变量ra，指针变量pa的值
cout << "a = " << a << endl;
cout << "ra = " << a << endl;
cout << "pa = " << hex << pa << endl;
// 输出指针变量pa指向的变量的值
cout << "*pa = " << *pa << "\n\n";
// 输出普通变量a，引用变量ra, 指针变量pa的类型信息
cout << "type a: " << typeid(a).name() << endl;
cout << "type ra: " << typeid(ra).name() << endl;
cout << "type pa: " << typeid(pa).name() << endl;
}

#include <iostream>
#include <vector>
using namespace std;
template<typename T>
void output(const T &x) {
for(auto i: x)
std::cout << i << ", ";
std::cout << "\b\b \n";
}
template<typename T>
void square1(T &x) {
for(auto i: x) // i是普通类型
i *= i;
}
template<typename T>
void square2(T &x) {
for(auto &i: x) // i是引用类型
i *= i;
}
void test1() {
vector<int> x {1, 2, 3, 4, 5};
cout << "动态int型数组对象x内的元素值: ";
output(x);
cout << "调用函数square1()......" << endl;
square1(x);
cout << "动态int型数组对象x内的元素值: ";
output(x);
}
void test2() {
vector<int> x {1, 2, 3, 4, 5};
cout << "动态int型数组对象x内的元素值: ";
output(x);
cout << "调用函数square2()......" << endl;
square2(x);
cout << "动态int型数组对象x内的元素值: ";
output(x);
}
int main() {
cout << "测试1: " << endl;
test1();
cout << "\n测试2: " << endl;
test2();
}

 任务五

#include "vectorInt.hpp"  
#include <iostream>  
using std::cout;  
using std::cin;  
using std::endl;  
  
class vectorInt {  
    std::vector<int> vec;  
public:  
    vectorInt(int n) : vec(n) {} // 初始化为n个元素，值未初始化  
    vectorInt(const vectorInt &other) : vec(other.vec) {} // 使用其他vectorInt对象构造  
    void at(int i, int val) { vec.at(i) = val; } // 设置元素值  
    int at(int i) const { return vec.at(i); } // 获取元素值  
};  
  
// 函数output()的定义：遍历输出vectorInt对象内的所有元素  
void output(const vectorInt &vi) {  
    for (int i = 0; i < vi.vec.size(); ++i) {  
        cout << vi.vec.at(i) << " ";  
    }  
    cout << endl;  
}  
  
void test() {  
    int n;  
    cout << "输入vectorInt对象中元素个数: ";  
    cin >> n;  
    vectorInt x1(n); // 构造动态int数组对象x1，包含n个元素，不对元素初始化  
    for (auto i = 0; i < n; ++i) {  
        x1.at(i) = i * i;  
    }  
    cout << "vectorInt对象x1: ";  
    output(x1);  
    vectorInt x2(n, 42); // 构造动态int数组对象x1，包含n个元素，每个元素初始值为42  
    cout << "vectorInt对象x2: ";  
    output(x2);  
    vectorInt x3(x2); // 使用x2构造x3  
    cout << "vectorInt对象x3: ";  
    output(x3);  
    cout << "更新vectorInt对象x2......\n";  
    x2.at(0) = 77;  
    x2.at(1) = -999;  
    cout << "vectorInt对象x2: ";  
    output(x2);  
    cout << "vectorInt对象x3: ";  
    output(x3);  
}  
  
int main() {  
    test();  
}