算法之美--2.3.3九宫格问题

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/*!
 * \file 九宫格问题.cpp
 *
 * \author ranjiewen
 * \date 十二月 2016
 *
 * 
 */

#include<iostream>
#include<iomanip>

using namespace std;

int main(int agrc, char **argv[])
{
    cout << "请输入幻方的小大n(大于1的奇数):" << endl;
    int n = 1;
    cin >> n;
    cout << endl;
    int **a = new int*[n];
    for (int i = 0; i < n;i++)
    {
        a[i] = new int[n];
        memset(a[i],0,n*sizeof(int));
    }
    int row = 0;
    int col = n / 2;

    for (int i = 1; i <= n*n;i++)
    {
        a[row][col] = i;
        row--;
        col++;
        if (row<0&&col>=n)
        {
            col--;
            row += 2;
        }
        else if (row < 0)
        {
            row = n - 1;
        }
        else if (col>=n)
        {
            col = 0;
        }
        else if (a[row][col]!=0)
        {
            col--;
            row += 2;
        }
    }

    for (int i = 0; i < n;i++)
    {
        for (int j = 0; j < n;j++)
        {
            cout << setw(6) << a[i][j];
        }
        cout << endl;
    }
    for (int i = n-1; i >0 ; i--)
    {
        delete[] a[i];
    }
    delete[] a;

    return 0;
}