#include <stdio.h>
#define ROWS 3
#define COLS 4
void sum_rows(int ar[][COLS], int rows);
void sum_cols(int [][COLS], int rows);
int sum2d(int (*ar) [COLS], int rows);
int main(void)
{
	int junk[ROWS][COLS] = {
		{2,4,6,8},
		{3,5,7,9},
		{12,10,8,6}
};
sum_rows(junk, ROWS);
sum_cols(junk, ROWS);
printf("Sum of all elements = %d\n", sum2d(junk, ROWS));
 
	   return 0;
}
 
void sum_rows(int ar[][COLS], int rows)
{
	int r;
	int c;
	int tot;
 
		for  (r = 0; r < rows; r++)
		{
			tot = 0;
				for (c = 0; c <COLS; c++)
					tot += ar[r][c];
			printf("row %d sum = %d\n", r, tot);
		}
}
 
void sum_cols(int ar[][COLS], int rows)
{
	int r;
	int c;
	int tot;
 
	for(c = 0; c < COLS; c++)
	{
			tot = 0;
			for (r = 0; r < rows; r++)
				tot += ar [r][c];
			printf("col %d sum = d%\n", c, tot);
}
}
 
int sum2d(int ar[][COLS], int rows)
{
	int r;
	int c;
	int tot = 0;
 
	for (r = 0; r < rows; r++)
		for (c = 0; c < COLS; c++)
			tot += ar[r][c];
	return tot;
}