Задачи и решения: Классы C++

34 thoughts on “Задачи и решения: Классы C++”

1. #include <iostream> using namespace std; class Matrix { private: int** arr; int** arr2; int rows, cols; public: void Fill_array(int rows_value, int cols_value) { rows = rows_value; cols = cols_value; arr = new int* [rows]; for (int i = 0; i < rows; i++) { arr[i] = new int[cols]; } for (int i = 0; i < rows; i++) { for (int j = 0; j < cols; j++) { arr[i][j] = 10 + rand()% + 50; cout << arr[i][j]<< "\t"; } cout << endl; } } void Change_rows_with_cols() { arr2 = new int* [cols]; for (int i = 0; i < cols; i++) { arr2[i] = new int[rows]; } cout << endl << endl; for (int i = 0; i < cols; i++) { for (int j = 0; j < rows; j++) { arr2[i][j] = arr[j][i]; cout << arr2[i][j] << "\t"; } cout << endl; } } ~ Matrix() { for (int i = 0; i < cols; i++) { delete[]arr2[i]; } cout << "Destructor for second matrix" << endl; delete[]arr2; for (int i = 0; i < rows; i++) { delete[]arr[i]; } cout << "Destructor for first matrix" << endl; delete[]arr; } }; int main() { Matrix first; first.Fill_array(2, 4); first.Change_rows_with_cols(); }

   1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

   #include <iostream> using namespace std;   class Matrix { private:       int** arr;     int** arr2;     int rows, cols;   public:       void Fill_array(int rows_value, int cols_value)     {         rows = rows_value;         cols = cols_value;           arr = new int* [rows];         for (int i = 0; i < rows; i++)         {             arr[i] = new int[cols];         }           for (int i = 0; i < rows; i++)         {             for (int j = 0; j < cols; j++)             {                 arr[i][j] = 10 + rand()% + 50;                 cout << arr[i][j]<< "\t";             }             cout << endl;         }       }       void Change_rows_with_cols()     {         arr2 = new int* [cols];         for (int i = 0; i < cols; i++)         {             arr2[i] = new int[rows];         }         cout << endl << endl;           for (int i = 0; i < cols; i++)         {             for (int j = 0; j < rows; j++)             {                 arr2[i][j] = arr[j][i];                 cout << arr2[i][j] << "\t";             }             cout << endl;         }     }       ~ Matrix()     {         for (int i = 0; i < cols; i++)         {             delete[]arr2[i];         }         cout << "Destructor for second matrix" << endl;         delete[]arr2;           for (int i = 0; i < rows; i++)         {             delete[]arr[i];         }         cout << "Destructor for first matrix" << endl;         delete[]arr;     } };   int main() {     Matrix first;     first.Fill_array(2, 4);     first.Change_rows_with_cols(); }

   Ответить

2. #include

   using namespace std;

   class Matrix {

   private:
   int **matrix;
   public:
   void setData(int row, int col) {
   matrix = new int* [row];
   for (int i = 0; i < row; i++) {
   matrix[i] = new int[col];
   }
   for (int i = 0; i < row; i++) {
   cout << '\n';
   for (int j = 0; j < col; j++) {
   matrix[i][j] = 1 + rand() % 9;
   cout << matrix[i][j] << '\t';
   }
   }
   cout << "\n====================================================\n";
   };
   void getData(int row,int col) {
   for (int i = 0; i < col; i++) {
   cout << '\n';
   for (int j = 0; j < row; j++) {
   cout << matrix[j][i] << '\t';
   }
   }
   for (int i = 0; i < row; i++) {
   delete[]matrix[i];
   }
   delete[]matrix;
   };
   };
   int main() {
   Matrix a;
   a.setData(3,6);
   a.getData(3,6);
   return 0;
   }

   Ответить

3. Я початківець, і ось мій код:

   #include

   using namespace std;

   class ArrayConverter{
   public:
   int numbers[7][3] = {
   0,0,0,
   0,0,0,
   0,0,0,
   0,0,0,
   0,0,0,
   0,0,0,
   0,0,0
   };
   int convertedNumbers[3][7] = {
   0,0,0,0,0,0,0,
   0,0,0,0,0,0,0,
   0,0,0,0,0,0,0
   };

   void SetRandomElements(){
   for(int i = 0; i < 7; i++){
   for(int j = 0; j < 3; j++){
   numbers[i][j] = rand() % 11;
   }
   }
   }
   void ShowOriginalArray(){
   for(int i = 0; i < 7; i++){
   for(int j = 0; j < 3; j++){
   cout << numbers[i][j] << " ";
   }
   cout << endl;
   }
   }

   void ConvertColumnsToRows(){
   for(int i = 0; i < 3; i++){
   for(int j = 0; j < 7; j++){
   convertedNumbers[i][j] = numbers[j][i];
   }
   }
   }
   void ShowConvertedArray(){
   for(int i = 0; i < 3; i++){
   for(int j = 0; j < 7; j++){
   cout << convertedNumbers[i][j] << " ";
   }
   cout << endl;
   }
   }

   ArrayConverter(){
   SetRandomElements();
   }
   };

   int main(){
   ArrayConverter converter;
   converter.ShowOriginalArray();
   converter.ConvertColumnsToRows();
   cout << endl;
   converter.ShowConvertedArray();
   return 0;
   }

   Ответить