Bài 2

#include <iostream>
using namespace std;

#define MATRIX_SIZE 3

class MyMatrix{
private:
    int m_matrix[MATRIX_SIZE][MATRIX_SIZE];
public:
    MyMatrix():m_matrix{}{

    }
    ~MyMatrix(){

    }

    void Intput(){
        cout << "input\ntwo_dimemsion_array =\n " << endl;

        for(int i = 0; i<MATRIX_SIZE; i++){
            cout << "Row " << i << ": \n";
            for(int j = 0; j<MATRIX_SIZE; j++){
                cin >> m_matrix[i][j];
            }
        }
    }

    void OutputToConsole(){
        for(int i = 0; i<MATRIX_SIZE; i++){
            cout << "\t[";
            for(int j = 0; j<MATRIX_SIZE; j++){
                cout << m_matrix[i][j];
                if(j + 1 < MATRIX_SIZE){
                    cout << ", ";
                }
            }
            cout << "],\n";
        }
        cout << "]" << endl;
    }

    void Rotate90Clockwise(){
        //brute force
        for(int j = 0; j<=MATRIX_SIZE / 2; j++){
            int temp = m_matrix[0][j];
            //left-top replaced by left-bottom
            m_matrix[0][j] = m_matrix [MATRIX_SIZE - 1 - j][0];
            //left-top replaced by right-bottom
            m_matrix[MATRIX_SIZE - 1 - j][0] = m_matrix[MATRIX_SIZE - 1][MATRIX_SIZE - 1 - j];
             //right-bottom replaced by right-top
            m_matrix[MATRIX_SIZE - 1][MATRIX_SIZE - 1 - j] = m_matrix[j][MATRIX_SIZE - 1];
            //temp to right-top
            m_matrix[j][MATRIX_SIZE - 1] = temp;
        }
    }
};
int main(){
    MyMatrix obj;

    obj.Intput();
    cout << "#input" << endl;
    obj.OutputToConsole();
    obj.Rotate90Clockwise();
    cout << "#output\n[\n" << endl;
    obj.OutputToConsole();

    return 0;
}