#ifndef GRAY_H#define GRAY_H#include "wm.h"#include "pgm.h"gray **alloc_grays(int cols, int rows);gray **alloc_grays_8x8();void free_grays(gray **grays);void copy_grays_to_block(gray ** block_grays, gray ** image_grays, int col, int row, int width, int height);void copy_grays_from_block(gray ** image_grays, gray ** block_grays, int col, int row, int width, int height);void print_grays(gray **grays, int col, int row, int width, int height);void print_grays_8x8(gray **grays);#endif