# Wipro: Given a 2D array, print it in spiral form?

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## Wipro Coding Questions

Given a 2D array, print it in spiral form?

Exampleâ€™s:

``````Input:
1    2   3   4
5    6   7   8
9   10  11  12
13  14  15  16
Output:
1 2 3 4 8 12 16 15 14 13 9 5 6 7 11 10

Input:
1   2   3   4  5   6
7   8   9  10  11  12
13  14  15 16  17  18
Output:
1 2 3 4 5 6 12 18 17 16 15 14 13 7 8 9 10 11``````

Program: 2D Array in Spiral form

``````#include
#define R 3
#define C 6
void spiralPrint(int m, int n, int a[R][C])
{
int i, k = 0, l = 0;

/* k â€“ starting row index
m â€“ ending row index
l â€“ starting column index
n â€“ ending column index
i â€“ iterator
*/

while (k < m && l < n)
{
/* Print the first row from the remaining rows */
for (i = l; i < n; ++i)
{
printf(â€œ%d â€œ, a[k][i]);
}
k++;

/* Print the last column from the remaining columns */
for (i = k; i < m; ++i)
{
printf(â€œ%d â€œ, a[i][n-1]);
}
n-â€“;

/* Print the last row from the remaining rows */
if ( k < m)
{
for (i = n-1; i >= l; â€“i)
{
printf(â€œ%d â€œ, a[m-1][i]);
}
m-â€“;
}

/* Print the first column from the remaining columns */
if (l < n)
{
for (i = m-1; i >= k; â€“i)
{
printf(â€œ%d â€œ, a[i][l]);
}
l++;
}
}
}

/* Driver program to test above functions */
int main()
{
int a[R][C] = { {1, 2, 3, 4, 5, 6},
{7, 8, 9, 10, 11, 12},
{13, 14, 15, 16, 17, 18}
};

spiralPrint(R, C, a);
return 0;
}

OUTPUT: 1 2 3 4 5 6 12 18 17 16 15 14 13 7 8 9 10 11 ``````