C++ Program to Rotate the matrix right by K times

// CPP program to rotate a matrix right by k times
#include <iostream>

// size of matrix
#define M 3
#define N 3

using namespace std;

// function to rotate matrix by k times
void rotateMatrix(int matrix[][M], int k) {
  // temporary array of size M
  int temp[M];

  // within the size of matrix
  k = k % M;

  for (int i = 0; i < N; i++) {

    // copy first M-k elements to temporary array
    for (int t = 0; t < M - k; t++)
      temp[t] = matrix[i][t];

    // copy the elements from k to end to starting
    for (int j = M - k; j < M; j++)
      matrix[i][j - M + k] = matrix[i][j];

    // copy elements from temporary array to end
    for (int j = k; j < M; j++)
      matrix[i][j] = temp[j - k];
  }
}

// function to display the matrix
void displayMatrix(int matrix[][M]) {
  for (int i = 0; i < N; i++) {
    for (int j = 0; j < M; j++)
      cout << matrix[i][j] << " ";
    cout << endl;
  }
}

// Driver's code
int main() {
  int matrix[N][M] = {{12, 23, 34},
                     {45, 56, 67}, 
                     {78, 89, 91}};
  int k = 2;

  // rotate matrix by k
  rotateMatrix(matrix, k);

  // display rotated matrix
  displayMatrix(matrix);

  return 0;
}