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实验三

时间：2023-11-03 18:56:14浏览次数：27  
标签：index const Point int 实验 vectorPoint size

任务一

task1.cpp 
 1 #include <iostream>
 2 #include "point.hpp"
 3 #include <vector>
 4 using std::vector;
 5 using std::cin;
 6 void output(const vector<Point> &v) {
 7 for(auto &t: v)
 8 t.show();
 9 }
10 void test() {
11 int n;
12 cin >> n;
13 vector<Point> x(n);
14 cout << "x" << endl;
15 output(x);
16 vector<Point> y(x);
17 cout << "\nx " << endl;
18 output(y);
19 cout << "\nupdate x" << endl;
20 x.at(0).move(30, 50); 
21 x.push_back(Point(2, 2)); 
22 cout << "\nx total:" << endl;
23 output(x);
24 cout << "\ny total: " << endl;
25 output(y);
26 }
27 int main() {
28 test();
29 }
View Code Point.cpp 
 1 #pragma once
 2 #include <iostream>
 3 using std::cout;
 4 using std::endl;
 5 class Point {
 6 public:
 7 Point(int x0 = 0, int y0 = 0);
 8 ~Point() = default;
 9 int get_x() const;
10 int get_y() const;
11 void show() const;
12 void move(int new_x, int new_y);
13 private:
14 int x, y;
15 };
16 Point::Point(int x0, int y0): x{x0}, y{y0} {
17 }
18 int Point::get_x() const {
19 return x;
20 }
21 int Point::get_y() const {
22 return y;
23 }
24 void Point::show() const {
25 cout << "(" << x << ", " << y << ")" << endl;
26 }
27 void Point::move(int new_x, int new_y) {
28 x = new_x;
29 y = new_y;
30 }
View Code

 

  任务二 task2.cpp 
 1 #include "vectorPoint.hpp"
 2 #include <iostream>
 3 void output(const vectorPoint &v) {
 4 for(auto i = 0; i < v.get_size(); ++i)
 5 v.at(i).show();
 6 }
 7 void test() {
 8 using namespace std;
 9 int n;
10 cout << "vectorPoint yuansugeshu: ";
11 cin >> n;
12 vectorPoint x(n);
13 cout << "x information: " << endl;
14 output(x);
15 vectorPoint y(x);
16 cout << "\ny information: " << endl;
17 output(y);
18 cout << "\nupdate x information......" << endl;
19 x.at(0).move(30, 50);
20 x.at(1).move(-1, -1);
21 cout << "x information: " << endl;
22 output(x);
23 cout << "\ny information: " << endl;
24 output(y);
25 }
26 int main() {
27 test();
28 }
View Code vectorPoint.hpp 
 1 #pragma once
 2 #include "point.hpp"
 3 #include <cassert>
 4 #include <iostream>
 5 class vectorPoint{
 6 public:
 7 vectorPoint(int n);
 8 ~vectorPoint();
 9 int get_size() const; 
10 Point& at(int index);
11 Point& at(int index) const;
12 private:
13 int size; 
14 Point *ptr;
15 };
16 vectorPoint::vectorPoint(int n) : size{n} {
17 ptr = new Point[n];
18 }
19 vectorPoint::~vectorPoint() {
20 delete[] ptr;
21 }
22 int vectorPoint::get_size() const {
23 return size;
24 }
25 Point& vectorPoint::at(int index) {
26 assert(index >= 0 && index < size); 
27 return ptr[index];
28 }
29 Point& vectorPoint::at(int index) const {
30 assert(index >= 0 && index < size);
31 return ptr[index];
32 }
View Code Point.hpp 
 1 #pragma once
 2 #include <iostream>
 3 using std::cout;
 4 using std::endl;
 5 class Point {
 6 public:
 7 Point(int x0 = 0, int y0 = 0);
 8 ~Point() = default;
 9 int get_x() const;
10 int get_y() const;
11 void show() const;
12 void move(int new_x, int new_y);
13 private:
14 int x, y;
15 };
16 Point::Point(int x0, int y0): x{x0}, y{y0} {
17 }
18 int Point::get_x() const {
19 return x;
20 }
21 int Point::get_y() const {
22 return y;
23 }
24 void Point::show() const {
25 cout << "(" << x << ", " << y << ")" << endl;
26 }
27 void Point::move(int new_x, int new_y) {
28 x = new_x;
29 y = new_y;
30 }
View Code

 

任务三 task3.cpp 
 1 #include "vectorPoint.hpp"
 2 #include <iostream>
 3 void output(const vectorPoint &v) {
 4 for(auto i = 0; i < v.get_size(); ++i)
 5 v.at(i).show();
 6 }
 7 void test() {
 8 using namespace std;
 9 int n;
10 cout << "input vectorPoint how much number: ";
11 cin >> n;
12 vectorPoint x(n);
13 cout << "x information: " << endl;
14 output(x);
15 vectorPoint y(x);
16 cout << "\ny information: " << endl;
17 output(y);
18 cout << "\nupdate x information......" << endl;
19 x.at(0).move(30, 50);
20 x.at(1).move(-1, -1);
21 cout << "x information: " << endl;
22 output(x);
23 cout << "\ny information: " << endl;
24 output(y);
25 }
26 int main() {
27 test();
28 }
View Code Point.hpp 
 1 #pragma once
 2 #include "point.hpp"
 3 #include <cassert>
 4 #include <iostream>
 5 class vectorPoint{
 6 public:
 7 vectorPoint(int n);
 8 vectorPoint(const vectorPoint &vp);
 9 ~vectorPoint();
10 int get_size() const; 
11 Point& at(int index); 
12 Point& at(int index) const; 
13 private:
14 int size;
15 Point *ptr;
16 };
17 vectorPoint::vectorPoint(int n) : size{n} {
18 ptr = new Point[n];
19 }
20 vectorPoint::vectorPoint(const vectorPoint &vp): size{vp.size}, ptr{new Point[size]} {
21 for(auto i = 0; i < size; ++i)
22 ptr[i] = vp.ptr[i];
23 }
24 vectorPoint::~vectorPoint() {
25 delete[] ptr;
26 }
27 int vectorPoint::get_size() const {
28 return size;
29 }
30 Point& vectorPoint::at(int index) {
31 assert(index >= 0 && index < size);
32 return ptr[index];
33 }
34 Point& vectorPoint::at(int index) const {
35 assert(index >= 0 && index < size);
36 return ptr[index];
37 }
View Code vectorPoint.hpp 
 1 #pragma once
 2 #include "point.hpp"
 3 #include <cassert>
 4 #include <iostream>
 5 class vectorPoint{
 6 public:
 7 vectorPoint(int n);
 8 vectorPoint(const vectorPoint &vp);
 9 ~vectorPoint();
10 int get_size() const;
11 Point& at(int index);
12 Point& at(int index) const;
13 private:
14 int size;
15 Point *ptr;
16 };
17 vectorPoint::vectorPoint(int n) : size{n} {
18 ptr = new Point[n];
19 }
20 vectorPoint::vectorPoint(const vectorPoint &vp): size{vp.size}, ptr{new
21 Point[size]} {
22 for(auto i = 0; i < size; ++i)
23 ptr[i] = vp.ptr[i];
24 }
25 vectorPoint::~vectorPoint() {
26 delete[] ptr;
27 }
28 int vectorPoint::get_size() const {
29 return size;
30 }
31 Point& vectorPoint::at(int index) {
32 assert(index >= 0 && index < size); 
33 return ptr[index];
34 }
35 Point& vectorPoint::at(int index) const {
36 assert(index >= 0 && index < size);
37 return ptr[index];
38 }
View Code

 

  任务四 task4_1.cpp 
 1 #include <iostream>
 2 using namespace std;
 3 
 4 // 函数声明
 5 void swap1(int &rx, int &ry);    // 引用作为形参
 6 void swap2(int *px, int *py);    // 指针作为形参
 7 void print(int x, int y);        // 普通变量作为形参
 8 
 9 // 测试代码
10 void test() {
11     int x = 3, y = 4;
12 
13     print(x, y);
14     swap1(x, y);        // 函数调用，注意：引用作为形参时，实参形式
15     print(x, y);
16 
17     cout << endl;
18 
19     x = 3, y = 4;
20     print(x, y);
21     swap2(&x, &y);        // 函数调用，注意：指针作为形参时，实参形式
22     print(x, y);
23 }
24 
25 int main() {
26     test();
27 }
28 
29 // 函数定义：交换两个变量（引用变量作为形参）
30 void swap1(int &rx, int &ry) {
31     int t;
32 
33     t = rx;  rx = ry;  ry = t;
34 }
35 
36 // 函数定义：交换两个变量（指针变量作为形参）
37 void swap2(int *px, int *py) {
38     int t;
39 
40     t = *px;  *px = *py;  *py = t;
41 }
42 
43 // 函数定义：输出两个变量（普通变量作为形参）
44 void print(int x, int y) {
45     std::cout << "x = " << x << ", y = " << y << "\n";
46 }
View Code task4_2.cpp 
 1 #include <iostream>
 2 #include <typeinfo>
 3 using namespace std;
 4 
 5 int main() {
 6     int a;
 7     
 8     int &ra = a;
 9     ra = 4;
10 
11     int *pa = &a;
12     *pa = 5;
13 
14     // 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
15     cout << "&a = " << hex << &a << endl;
16     cout << "&ra = " << hex << &ra << endl;
17     cout << "&pa = " << hex << &pa << "\n\n";
18     
19     // 输出普通变量a, 引用变量ra，指针变量pa的值
20     cout << "a = " << a << endl;
21     cout << "ra = " << a << endl;
22     cout << "pa = " << hex << pa << endl;
23     
24     // 输出指针变量pa指向的变量的值
25     cout << "*pa = " << *pa << "\n\n";
26 
27     // 输出普通变量a，引用变量ra, 指针变量pa的类型信息
28     cout << "type a: " << typeid(a).name() << endl;
29     cout << "type ra: " << typeid(ra).name() << endl;
30     cout << "type pa: " << typeid(pa).name() << endl;
31 }
View Code task4_3.cpp 
 1 #include <iostream>
 2 #include <vector>
 3 
 4 using namespace std;
 5 
 6 template<typename T>
 7 void output(const T &x) {
 8     for(auto i: x)  
 9         std::cout << i << ", ";
10     std::cout << "\b\b \n";
11 }
12 
13 template<typename T>
14 void square1(T &x) {
15     for(auto i: x) // i是普通类型
16         i *= i;
17 }
18 
19 template<typename T>
20 void square2(T &x) {
21     for(auto &i: x)  // i是引用类型
22         i *= i;
23 }
24 
25 void test1() {
26     vector<int> x {1, 2, 3, 4, 5};
27 
28     cout << "动态int型数组对象x内的元素值: ";
29     output(x);
30 
31     cout << "调用函数square1()......" << endl;
32     square1(x);
33 
34     cout << "动态int型数组对象x内的元素值: ";
35     output(x);
36 }
37 
38 void test2() {
39     vector<int> x {1, 2, 3, 4, 5};
40 
41     cout << "动态int型数组对象x内的元素值: ";
42     output(x);
43 
44     cout << "调用函数square2()......" << endl;
45     square2(x);
46 
47     cout << "动态int型数组对象x内的元素值: ";
48     output(x);
49 }
50 
51 int main() {
52     cout << "测试1: " << endl;
53     test1();
54 
55     cout << "\n测试2: " << endl;
56     test2();
57 }
View Code

 

任务五 task5.cpp 
 1 #include "vectorInt.hpp"
 2 #include <iostream>
 3 
 4 using std::cout;
 5 using std::cin;
 6 using std::endl;
 7 
 8 void output(const vectorInt &vi) {
 9     for(int i = 0; i < vi.get_size(); ++i)
10         cout << vi.at(i) << ", ";
11     cout << "\b\b \n";
12 }
13 
14 void test() {
15     int n;
16     cout << "输入vectorInt对象中元素个数: ";
17     cin >> n;
18 
19     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
20     for(int i = 0; i < n; ++i)
21         x1.at(i) = i*i;
22     cout << "vectorInt对象x1: ";
23     output(x1);
24 
25     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
26     cout << "vectorInt对象x2: ";
27     output(x2);
28     vectorInt x3(x2);    // 使用x2构造x3
29     cout << "vectorInt对象x3: ";
30     output(x3);
31 
32     cout << "更新vectorInt对象x2......\n";
33     x2.at(0) = 77;
34     x2.at(1) = -999;
35 
36     cout << "vectorInt对象x2: ";
37     output(x2);
38     cout << "vectorInt对象x3: ";
39     output(x3);
40 }
41 
42 int main() {
43     test();
44 }
View Code vectorInt.hpp 
 1 #include<iostream>
 2 #include<cassert>
 3 using namespace std;
 4 class vectorInt
 5 {
 6 public:
 7     vectorInt(int n);
 8     vectorInt(int n,int m);
 9     vectorInt(const vectorInt & vc);
10     int get_size() const;
11     ~vectorInt();
12     int& at(int index);
13     int& at(int index) const;
14 private:
15     int size;
16     int *ptr;
17 };
18 vectorInt::vectorInt(int n)
19 {
20     size=n;
21     ptr =new int[n];
22     cout<<"constructor vectorInt(int n) called."<<endl;
23 }
24 vectorInt::vectorInt(int n,int m)
25 {
26     size=n;ptr= new int[n];
27     for(int i=0;i<size;i++)
28         ptr[i]=m;
29     cout<<"constructor vectorInt(int n,int value) called"<<endl;
30     
31 } 
32 vectorInt::vectorInt(const vectorInt & vc)
33 {
34     size=vc.size;
35     ptr=new int[size];
36     for(int i = 0; i < size; ++i)
37         ptr[i] = vc.ptr[i];    
38     cout<<"copy constructor called"<<endl; 
39 }
40 vectorInt::~vectorInt()
41 {
42     delete[] ptr;
43     cout<<"destructor called"<<endl;
44 }
45 int vectorInt::get_size() const 
46 {
47     return size;
48 }
49 int& vectorInt::at(int index) 
50 {
51     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
52     return ptr[index];
53 }
54 int& vectorInt::at(int index) const 
55 {
56     assert(index >= 0 && index < size);
57     return ptr[index];
58 }
View Code

 

任务六 task6.cpp 
 1 #include <iostream>
 2 #include "matrix.hpp"
 3 
 4 using namespace std;
 5 
 6 const int N1 = 3;
 7 const int N2 = 2;
 8 
 9 // 输出一个矩阵对象中索引为index对应的行的所有元素值
10 void output(const Matrix &m, int index) {
11     for(int j = 0; j < m.get_cols(); ++j)
12         cout << m.at(index, j) << ", ";
13     cout << "\b\b \n";
14 }
15 
16 void test() {
17 
18 
19     double x[N1*N2] = {1, 2, 3, 4, 5, 6};
20 
21     Matrix m1(N1, N2);      // 创建一个N1×N2矩阵
22     m1.set(x);              // 用一维数组x的值按行为矩阵m1赋值
23     cout << "矩阵对象m1: " << endl;
24     m1.print();             // 打印矩阵m1的值
25     cout << "矩阵对象m1第0行是: " << endl;
26     output(m1, 0);
27     cout << endl;
28 
29     Matrix m2(N2, N1);
30     m2.set(x);
31     cout << "矩阵对象m2: " << endl;
32     m2.print();         
33     cout << "矩阵对象m2第0行是: " << endl;
34     output(m2, 0);
35     cout << endl;
36 
37     Matrix m3(m2);      // 用矩阵m2构造新的矩阵m3
38     m3.set(0, 0, 999);  // 讲矩阵对象m2索引(0,0)元素设为999
39     cout << "矩阵对象m3:" << endl;
40     m3.print();
41     cout << endl;
42 
43     Matrix m4(2);       // 创建一个2*2矩阵对象
44     m4.set(x);          // 用一维数组x的值按行为矩阵m4赋值
45     cout << "矩阵对象m4:" << endl;
46     m4.print();
47 }
48 
49 int main() {
50     test();
51 }
View Code matrix.hpp 
 1 #include <iostream>
 2 #include <cassert>
 3 using std::cout;
 4 using std::endl;
 5 // 类Matrix的声明
 6 class Matrix {
 7 public:
 8     Matrix(int n, int m); // 构造函数，构造一个n*m的矩阵
 9     Matrix(int n); // 构造函数，构造一个n*n的矩阵
10     Matrix(const Matrix &x); // 复制构造函数， 使用已有的矩阵X构造
11     ~Matrix();
12     void set(const double *pvalue); // 用pvalue指向的连续内存块数据按行为矩阵赋值
13     void set(int i, int j, double value); // 设置矩阵对象索引(i,j)的元素值为value
14     double& at(int i, int j) const; // 返回矩阵对象索引(i,j)的元素引用
15     double& at(int i, int j); // 返回矩阵对象索引(i,j)的元素引用
16     int get_lines() const; // 返回矩阵对象行数
17     int get_cols() const; // 返回矩阵对象列数
18     void print() const; // 按行打印输出矩阵对象元素值
19 private:
20     int lines; // 矩阵对象内元素行数
21     int cols; // 矩阵对象内元素列数
22     double *ptr;
23 };
24 Matrix::Matrix(int n,int m) 
25 {
26     lines=n;cols=m;
27     ptr= new double[n*m];
28 }
29 Matrix::Matrix(int n)
30 {
31     lines=n;cols=n;
32     ptr=new double[lines*cols];
33 }
34 Matrix::Matrix(const Matrix &x)
35 {
36     lines=x.lines;
37     cols=x.cols;
38     ptr=new double[cols*lines];
39     for(int i=0;i<lines;i++)
40         for(int j=0;j<cols;j++)
41             ptr[i*cols+j]=x.ptr[i*cols+j];    
42 }
43 Matrix::~Matrix()
44 {
45     delete[] ptr;
46 }
47 void Matrix::set(const double *pvaule)
48 {
49     for(int i=0;i<lines;i++)
50         for(int j=0;j<cols;j++)
51             ptr[i*cols+j]=pvaule[i*cols+j];
52 }
53 void Matrix::set(int i,int j,double value)
54 {
55     ptr[i*cols+j]=value;
56 }
57 double& Matrix::at(int i,int j)
58 {
59     return ptr[i*cols+j];
60 }
61 double& Matrix::at(int i,int j) const
62 {
63     return ptr[i*cols+j];
64 }
65 int Matrix::get_lines() const
66 {
67     return lines;
68 }
69 int Matrix::get_cols() const
70 {
71     return cols;
72 }
73 void Matrix::print() const
74 {
75     for(int i=0;i<lines;i++)
76     {
77         for(int j=0;j<cols;j++)
78         {
79             cout<<ptr[i*cols+j]<<"  ";
80         }
81     cout<<endl;
82     }
83 }
View Code

 

 

标签：index,const,Point,int,实验,vectorPoint,size
From： https://www.cnblogs.com/dmsx/p/17808207.html

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