#include #include using namespace std; template inline void do_rotate(Type* rotated_matrix, const pair& position, const unsigned &row, const unsigned &columm, const uint8_t inside_row, const uint8_t inside_columm, const uint8_t rotation_position, const Type* const element) { int*rotated_matrix_walker = (rotated_matrix + position.first * columm + (position.second)); int offset = 1, element_index = -1; while (true) { if (++element_index == rotation_position) { *rotated_matrix_walker = *element; return; } rotated_matrix_walker += offset; if (rotated_matrix + ((position.first * columm) + position.second + inside_columm - 1) == rotated_matrix_walker) offset = columm; else if (rotated_matrix + ((position.first * columm) + position.second + ((inside_row - 1) * columm) + inside_columm - 1) == rotated_matrix_walker) offset = -1; else if (rotated_matrix + ((position.first * columm) + position.second + ((inside_row - 1) * columm)) == rotated_matrix_walker) offset = -1 * columm; } } template Type* matrix_rotation(Type * const matrix, const unsigned row, const unsigned column, const unsigned rotation) { pair position = make_pair(0, 0); Type *rotated_matrix = new Type[row * column]; int offset = 1; int *matrix_walker = matrix; uint8_t inside_row = row, inside_column = column; int32_t array_lenght(0), element_index(0); while (inside_row > 0 && inside_column > 0) { array_lenght = (2 * inside_column + ((inside_row - 2) * 2)); do { do_rotate(rotated_matrix, position, row, column, inside_row, inside_column, (rotation + element_index) % array_lenght, matrix_walker); matrix_walker += offset; element_index++; if (matrix + ((position.first * column) + position.second + inside_column - 1) == matrix_walker) offset = column; else if (matrix + ((position.first * column) + position.second + ((inside_row - 1) * column) + inside_column - 1) == matrix_walker) offset = -1; else if (matrix + ((position.first * column) + position.second + ((inside_row - 1) * column)) == matrix_walker) offset = -1 * column; } while ((matrix + (position.first * column + position.second)) != matrix_walker); position.first++; position.second++; inside_row -= 2; inside_column -= 2; offset = 1; matrix_walker = matrix + (position.first * column) + (position.second); } return rotated_matrix; } int main() { int *matrix = new int[16]{7,20,31,90,9,10,40,8,50,2,70,10,10,20,25,49}; int*rotated_matrix = matrix_rotation(matrix,4,4,1); return 0; }