Pointers 301
9.6 POINTERS AND TWO-DIMENSIONAL ARRAYS
A matrix can represent two-dimensional elements of an array. Details about it are explained in the
chapter 9 ] Array. Here, the first argument is row number and second column number. To display the
elements of two-dimensional array using pointer it is essential to have ' &' operator as pre-fix with an
array name followed by element numbers, otherwise compiler shows an error.
9.23 Write a program to display array elements and their address using pointers.
# include <stdio.h>
# include <canio.h>
void main ()
{
int i, j= l,*p ;
int a [3 ][3 ]= {{1 ,2 ,3 },{4 ,5 ,6 },{7 ,8 ,9 }};
clrscr();
printf ("\tElements of An Array with their addresses\n\n");
p=ba[0][0];
for (i=0,i<9,i++,j++)
I
printf ("%5d [%5u ]",*(p),p);
P++;
if(j==3)
I
printf ( " W ');
j=0;
I
I
OUTPUT:
Elements of An Array with their addresses.
1 [40521 2 [4054] 3 [4056]
4 [4058] 5 [4060] 6 [4062]
7 [4064] 8 [4066] 9 [4068]
Explanation In the above program two-dimensional array is declared and initialized. The base
address of an array is assigned to integer pointer ' p ' . While assigning the base address of two-
dimensional array, operator is to .be pre-fixed with array name followed by element numbers
which are necessary otherwise the compiler shows an error. The statement p=&a [ 0 ] [ 0 ] is used in this
context. The pointer 'p ' is printed and increased in for loop till it prints entire array elements. The i f
statement splits a line when three elements in each row are printed.

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