2. Save your array2d3.c program from the previous problem as array2d3-better.c.

Q: 2. Save your array2d3.c program from the previous problem as array2d3-better.c.

include the stdlib library #include

ID: 3543268 • Letter: 2

Question

2. Save your array2d3.c program from the previous problem as array2d3-better.c. Edit array2d3-better.c so that the definitions of the four matrix-handling functions conform to the following prototypes:

ra_2d display2d( ra_2d a, size_t nrows, size_t ncols, char *caption );

ra_2d hflip( ra_2d a, size_t nrows, size_t ncols );

ra_2d vflip( ra_2d a, size_t nrows, size_t ncols );

ra_2d rotate( ra_2d a, size_t n );

You must define ra_2d to stand for the type "pointer to array of MAXCOLS ints". The return value for each of the above functions is simply its first parameter. Note that a fourth parameter, caption, of string type (that is, of char * type), has been added for display2d; your definition of this function should display this parameter value before displaying the matrix parameter a.

Returning the matrix parameter allows users of these functions to chain a series of matrix operations in a single nested function call expression. For example, the nested call:

display2d( rotate( t, MAXROWS ), MAXROWS, MAXCOLS, "After rotating 90 degrees clockwise: " )

will rotate the numbers contained in the square matrix a (remember, we're assuming MAXROWS = MAXCOLS) then display the caption "After rotating 90 degrees clockwise:" on a line by itself, followed by a display of the rotated matrix.

Here is array2d3.c

#include <stdio.h>

#include <stddef.h> /* for size_t type definition */

#define MAXROWS 3

#define MAXCOLS 3

/* function prototypes */

void display2d( int a[][MAXCOLS], size_t nrows, size_t ncols );

void hflip( int a[][MAXCOLS], size_t nrows, size_t ncols );

void vflip( int a[][MAXCOLS], size_t nrows, size_t ncols );

void rotate( int a[][MAXCOLS], size_t n );

int main( void )

{

int t[MAXROWS][MAXCOLS] = { {1, 2, 3}, {4, 5, 6}, {7,8,9} };