#include <stdio.h>
#define R 4
#define C 5
void spiralOfMatrix(int enrow, int encol, int arr1[R][C])
{
int i, rowind = 0, colind = 0;
while (rowind < enrow && colind < encol)
{
for (i = colind; i < encol; ++i)
{
printf("%d ", arr1[rowind][i]);
}
rowind++;
for (i = rowind; i < enrow; ++i)
{
printf("%d ", arr1[i][encol - 1]);
}
encol--;
if (rowind < enrow)
{
for (i = encol - 1; i >= colind; --i)
{
printf("%d ", arr1[enrow - 1][i]);
}
enrow--;
}
if (colind < encol)
{
for (i = enrow - 1; i >= rowind; --i)
{
printf("%d ", arr1[i][colind]);
}
colind++;
}
}
}
int main()
{
int i, j;
int arr1[R][C] = {{1, 2, 3, 4, 5},
{6, 7, 8, 9, 10},
{11, 12, 13, 14, 15},
{16, 17, 18, 19, 20}};
printf("The given array in matrix form is : \n");
for (i = 0; i < R; i++)
{
for (j = 0; j < C; j++)
{
printf("%d ", arr1[i][j]);
}
printf("\n");
}
printf("The spiral form of above matrix is: \n");
spiralOfMatrix(R, C, arr1);
return 0;
}
OUTPUT:
The given array in matrix form is :
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
16 17 18 19 20
The spiral form of above matrix is:
1 2 3 4 5 10 15 20 19 18 17 16 11 6 7 8 9 14 13 12