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  1. #include <iostream>
  2. #include <cmath>
  3. #include <ctime>
  4.  
  5. class Matrix {
  6.     int **ptr = nullptr;
  7.     int x = NULL, y = NULL;
  8. public:
  9.     Matrix() = default;
  10.     Matrix(int i, int j) :x(i), y(j)
  11.     {
  12.         ptr = new int*[x];
  13.         for (int i = 0; i < x; i++)
  14.             ptr[i] = new int[y];
  15.     }
  16.     Matrix(int i) :Matrix(i, i) {}
  17.     Matrix(const Matrix &ob) : x(ob.x), y(ob.y)
  18.     {
  19.         //ўл¤Ґ«пҐ¬ Ї ¬пвм ¤«п Є®ЇЁЁ.
  20.         ptr = new int*[ob.x];               
  21.         for (int i = 0; i < ob.x; i++)
  22.             ptr[i] = new int[ob.y];
  23.  
  24.         //Є®ЇЁа㥬.
  25.         for (int i = 0; i < ob.x; i++)
  26.             for (int j = 0; j < ob.y; j++)
  27.                 ptr[i][j] = ob.ptr[i][j];
  28.     }
  29.     Matrix& operator=(Matrix rhs);
  30.     ~Matrix();
  31.  
  32.     void fill();
  33.     void show();    
  34. };
  35.  
  36. Matrix& Matrix::operator=(Matrix rhs)
  37. {
  38.     int tmp = x; x = rhs.x; rhs.x = tmp;
  39.     tmp = y; y = rhs.y; rhs.y = tmp;
  40.     int ** t = ptr; ptr = rhs.ptr; rhs.ptr = t;
  41.     return *this;
  42. }
  43.  
  44. Matrix::~Matrix()
  45. {
  46.     for (int i = 0; i < x; i++)
  47.         delete[] ptr[i];
  48.     delete[] ptr;
  49. }
  50.  
  51. void Matrix::fill()
  52. {
  53.     std::srand(std::time(NULL));
  54.     for (int i = 0; i < x; i++) {
  55.         for (int j = 0; j < y; j++)
  56.             ptr[i][j] = rand() % 10;
  57.     }
  58. }
  59.  
  60. void Matrix::show()
  61. {
  62.     for (int i = 0; i < x; i++) {
  63.         for (int j = 0; j < y; j++) {
  64.             std::cout << ptr[i][j] << ' ';
  65.         } std::cout << std::endl;
  66.     } std::cout << std::endl;
  67. }
  68.  
  69. int main()
  70. {   
  71.     Matrix A(2), B;
  72.  
  73.     A.fill();
  74.     A.show();
  75.  
  76.     B = A;
  77.  
  78.     std::cout << std::endl;
  79.     B.show();
  80.  
  81.     return 0;
  82. }
Success #stdin #stdout 0s 3472KB
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https://ideone.com/GjqQ95
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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