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实验三 类与数组、指针

时间：2023-11-05 20:01:16浏览次数：28  
标签：index const vectorPoint Point int 实验 数组 include 指针

任务一

point.hpp

#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;
}
View Code

task1.cpp

#include <iostream>
#include "point.hpp"
#include <vector>
using std::vector;
using std::cin;
void output(const vector<Point> &v) {
for(auto &t: v)
t.show();
}
void test() {
int n;
cin >> n;
vector<Point> x(n);
cout << "x" << endl;
output(x);
vector<Point> y(x);
cout << "\nx " << endl;
output(y);
cout << "\nupdate x" << endl;
x.at(0).move(30, 50);
x.push_back(Point(2, 2));
cout << "\nx total:" << endl;
output(x);
cout << "\ny total: " << endl;
output(y);
}
int main() {
test();
}
View Code

运行结果

 

任务二

Point.hpp

#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;
}
View Code

vectorPoint.hpp

#pragma once
#include "point.hpp"
#include <cassert>
#include <iostream>
class vectorPoint{
public:
vectorPoint(int n);
~vectorPoint();
int get_size() const;
Point& at(int index);
Point& at(int index) const;
private:
int size;
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);
return ptr[index];
}
Point& vectorPoint::at(int index) const {
assert(index >= 0 && index < size);
return ptr[index];
}
View Code

task2.cpp

#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 << "vectorPoint yuansugeshu: ";
cin >> n;
vectorPoint x(n);
cout << "x information: " << endl;
output(x);
vectorPoint y(x);
cout << "\ny information: " << endl;
output(y);
cout << "\nupdate x information......" << endl;
x.at(0).move(30, 50);
x.at(1).move(-1, -1);
cout << "x information: " << endl;
output(x);
cout << "\ny information: " << endl;
output(y);
}
int main() {
test();
}
View Code

运行结果

 

任务三

Point.hpp

#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;
}
View Code

vectorPoint.hpp

#pragma once
#include "point.hpp"
#include <cassert>
#include <iostream>
class vectorPoint{
public:
vectorPoint(int n);
vectorPoint(const vectorPoint &vp);
~vectorPoint();
int get_size() const;
Point& at(int index);
Point& at(int index) const;
private:
int size;
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);
return ptr[index];
}
Point& vectorPoint::at(int index) const {
assert(index >= 0 && index < size);
return ptr[index];
}
View Code

task3.cpp

#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 << "input vectorPoint how much number: ";
cin >> n;
vectorPoint x(n);
cout << "x information: " << endl;
output(x);
vectorPoint y(x);
cout << "\ny information: " << endl;
output(y);
cout << "\nupdate x information......" << endl;
x.at(0).move(30, 50);
x.at(1).move(-1, -1);
cout << "x information: " << endl;
output(x);
cout << "\ny information: " << endl;
output(y);
}
int main() {
test();
}
View Code

运行结果

 

任务四

task4_1.cpp

#include <iostream>
using namespace std;

void swap1(int &rx, int &ry);
void swap2(int *px, int *py);
void print(int x, int y);

void test() {
    int x = 3, y = 4;

    print(x, y);
    swap1(x, y);
    print(x, y);

    cout << endl;

    x = 3, y = 4;
    print(x, y);
    swap2(&x, &y);
    print(x, y);
}

int main() {
    test();
}

void swap1(int &rx, int &ry) {
    int t;

    t = rx;  rx = ry;  ry = t;
}

void swap2(int *px, int *py) {
    int t;

    t = *px;  *px = *py;  *py = t;
}

void print(int x, int y) {
    std::cout << "x = " << x << ", y = " << y << "\n";
}
View Code

运行结果

 

task4_2.cpp

#include <iostream>
#include <typeinfo>
using namespace std;

int main() {
    int a;
    
    int &ra = a;
    ra = 4;

    int *pa = &a;
    *pa = 5;

    cout << "&a = " << hex << &a << endl;
    cout << "&ra = " << hex << &ra << endl;
    cout << "&pa = " << hex << &pa << "\n\n";
    
    cout << "a = " << a << endl;
    cout << "ra = " << a << endl;
    cout << "pa = " << hex << pa << endl;
    
    cout << "*pa = " << *pa << "\n\n";

    cout << "type a: " << typeid(a).name() << endl;
    cout << "type ra: " << typeid(ra).name() << endl;
    cout << "type pa: " << typeid(pa).name() << endl;
}
View Code

运行结果

 

task4_3.cpp

#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 *= i;
}

template<typename T>
void square2(T &x) {
    for(auto &i: x) 
        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();
}
View Code

运行结果

 

任务五

task5.cpp

#include "vectorInt.hpp"
#include <iostream>

using std::cout;
using std::cin;
using std::endl;

void output(const vectorInt &vi) {
    for(auto i = 0; i < vi.get_size(); ++i)
        cout << vi.at(i) << ", ";
    cout << "\b\b \n";
}

void test() {
    int n;
    cout << "输入vectorInt对象中元素个数: ";
    cin >> n;

    vectorInt x1(n);
    for(auto i = 0; i < n; ++i)
        x1.at(i) = i*i;
    cout << "vectorInt对象x1: ";
    output(x1);

    vectorInt x2(n, 42);
    cout << "vectorInt对象x2: ";
    output(x2);
    vectorInt x3(x2);
    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();
}
View Code

vectorInt.hpp

#include<iostream>
#include<cassert>
using namespace std;
class vectorInt
{
public:
    vectorInt(int n);
    vectorInt(int n,int m);
    vectorInt(const vectorInt & vc);
    int get_size() const;
    ~vectorInt();
    int& at(int index);
    int& at(int index) const;
private:
    int size;
    int *ptr;
};
vectorInt::vectorInt(int n)
{
    size=n;
    ptr =new int[n];
    cout<<"constructor vectorInt(int n) called."<<endl;
}
vectorInt::vectorInt(int n,int m)
{
    size=n;ptr= new int[n];
    for(int i=0;i<size;i++)
        ptr[i]=m;
    cout<<"constructor vectorInt(int n,int value) called"<<endl;

}
vectorInt::vectorInt(const vectorInt & vc)
{
    size=vc.size;
    ptr=new int[size];
    for(int i = 0; i < size; ++i)
        ptr[i] = vc.ptr[i];
    cout<<"copy constructor called"<<endl;
}
vectorInt::~vectorInt()
{
    delete[] ptr;
    cout<<"destructor called"<<endl;
}
int vectorInt::get_size() const
{
    return size;
}
int& vectorInt::at(int index)
{
    assert(index >= 0 && index < size); 
    return ptr[index];
}
int& vectorInt::at(int index) const
{
    assert(index >= 0 && index < size);
    return ptr[index];
}
View Code

运行结果

 

任务六

task6.cpp

#include <iostream>
#include "matrix.hpp"

using namespace std;

const int N1 = 3;
const int N2 = 2;

void output(const Matrix &m, int index) {
    for(int j = 0; j < m.get_cols(); ++j)
        cout << m.at(index, j) << ", ";
    cout << "\b\b \n";
}

void test() {


    double x[N1*N2] = {1, 2, 3, 4, 5, 6};

    Matrix m1(N1, N2);
    m1.set(x);
    cout << "矩阵对象m1: " << endl;
    m1.print();
    cout << "矩阵对象m1第0行是: " << endl;
    output(m1, 0);
    cout << endl;

    Matrix m2(N2, N1);
    m2.set(x);
    cout << "矩阵对象m2: " << endl;
    m2.print();
    cout << "矩阵对象m2第0行是: " << endl;
    output(m2, 0);
    cout << endl;

    Matrix m3(m2);
    m3.set(0, 0, 999);
    cout << "矩阵对象m3:" << endl;
    m3.print();
    cout << endl;

    Matrix m4(2);
    m4.set(x);
    cout << "矩阵对象m4:" << endl;
    m4.print();
}

int main() {
    test();
}
View Code

matrix.hpp

#include <iostream>
#include <cassert>
using std::cout;
using std::endl;

class Matrix {
public:
    Matrix(int n, int m);
    Matrix(int n); 
    Matrix(const Matrix &x); 
    ~Matrix();
    void set(const double *pvalue); 
    void set(int i, int j, double value); 
    double& at(int i, int j) const;
    double& at(int i, int j); 
    int get_lines() const; 
    int get_cols() const;
    void print() const; 
private:
    int lines;
    int cols; 
    double *ptr;
};
Matrix::Matrix(int n,int m)
{
    lines=n;cols=m;
    ptr= new double[n*m];
}
Matrix::Matrix(int n)
{
    lines=n;cols=n;
    ptr=new double[lines*cols];
}
Matrix::Matrix(const Matrix &x)
{
    lines=x.lines;
    cols=x.cols;
    ptr=new double[cols*lines];
    for(int i=0;i<lines;i++)
        for(int j=0;j<cols;j++)
            ptr[i*cols+j]=x.ptr[i*cols+j];
}
Matrix::~Matrix()
{
    delete[] ptr;
}
void Matrix::set(const double *pvaule)
{
    for(int i=0;i<lines;i++)
        for(int j=0;j<cols;j++)
            ptr[i*cols+j]=pvaule[i*cols+j];
}
void Matrix::set(int i,int j,double value)
{
    ptr[i*cols+j]=value;
}
double& Matrix::at(int i,int j)
{
    return ptr[i*cols+j];
}
double& Matrix::at(int i,int j) const
{
    return ptr[i*cols+j];
}
int Matrix::get_lines() const
{
    return lines;
}
int Matrix::get_cols() const
{
    return cols;
}
void Matrix::print() const
{
    for(int i=0;i<lines;i++)
    {
        for(int j=0;j<cols;j++)
        {
            cout<<ptr[i*cols+j]<<"  ";
        }
    cout<<endl;
    }
}
View Code

运行结果

 

标签：index,const,vectorPoint,Point,int,实验,数组,include,指针
From： https://www.cnblogs.com/NFurioso/p/17811033.html

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