SpiraPrint

spiralPrint.cpp

#include <iostream>
const int N = 5;

int count = 1;

void spiralPrint(int end_row, int end_col, int arr[N][N])
{
    int start_row = 0, start_col = 0;

    while (start_row < end_row && start_col < end_col)
    {
        /* Print the first row from the remaining rows */
        for (int i = start_col; i < end_col; ++i)
        {
            if (count == 5)
                count = 1;

            arr[start_row][i] = count;
            count++;
        }
        start_row++;

        /* Print the last column from the remaining columns */
        for (int i = start_row; i < end_row; ++i)
        {
            if (count == 5)
                count = 1;
            arr[i][end_col - 1] = count;
            count++;
        }
        end_col--;

        /* Print the last row from the remaining rows */
        if (start_row < end_row)
        {
            for (int i = end_col - 1; i >= start_col; --i)
            {
                if (count == 5)
                    count = 1;
                arr[end_row - 1][i] = count;
                count++;
            }
            end_row--;
        }

        /* Print the first column from the remaining columns */
        if (start_col < end_col)
        {
            for (int i = end_row - 1; i >= start_row; --i)
            {
                if (count == 5)
                    count = 1;
                arr[i][start_col] = count;
                count++;
            }
            start_col++;
        }

    }

    arr[N / 2][N / 2] = 9;

    for (int i = 0; i < N; i++)
    {
        for (int j = 0; j < N; j++)
        {
            std::cout << arr[i][j] << " ";
        }
        std::cout << std::endl;
    }
}

/* Driver program to test above functions */
int main()
{
    int arr[N][N] = {
        {1, 2, 3, 4, 5},
        {4, 5, 6, 5, 8},
        {7, 8, 9, 6, 7},
        {7, 8, 9, 6, 6},
        {7, 8, 9, 6, 8},
    };

    spiralPrint(N, N, arr);
    return 0;
}