#include <iostream>
using namespace std;

void round_print(int **a, int x_temp1, int y_temp1, int x_temp2, int y_temp2, bool reverse)
{
    if(reverse)
        while(x_temp1 <= x_temp2)
        {
            cout << a[x_temp1][y_temp1] << ' ';
            x_temp1 = x_temp1 + 1;
            y_temp1 =
 
 y_temp1 - 1;
        }
    else
        while(x_temp2 >= x_temp1)
        {
            cout << a[x_temp2][y_temp2] << ' ';
            x_temp2 = x_temp2 - 1;
            y_temp2 = y_temp2 + 1;
        }
} 

int main()
{
    cout << "please input rows and columns: ";
    int rows,
 
 columns; cin >> rows >> columns;
    int **nums = new int *[rows];
    for(int i = 0; i < rows; i++)
        nums[i] = new int [columns];

    cout << "please input the data: ";
    for(int i = 0; i < rows; i++)
    {
        for(int ii = 0; ii < columns; ii++)
        {
            cin >>
 
 nums[i][ii];
        }
    }

    cout << "the row data is: " << endl;
    for(int i = 0; i < rows; i++)
    {
        for(int ii = 0; ii < columns; ii++)
        {
            cout << nums[i][ii] << ' ';
        }
        cout << endl;
    }

    cout << "the output data is: " << endl;
    int a_temp1 = 0, a_temp2 = 0, b_temp1 = 0, b_temp2 = 0;bool reverse = false;
    while(a_temp1 < rows)
    {
        round_print(nums, a_temp1, a_temp2, b_temp1, b_temp2, reverse);
        a_temp1 = (a_temp2 == columns - 1? a_temp1 + 1 : 0);
        a_temp2 = (a_temp2 == columns - 1? a_temp2 : a_temp2 + 1);
        b_temp2 = (b_temp1 == rows - 1? b_temp2 + 1 : 0);
        b_temp1 = (b_temp1 == rows - 1? b_temp1 : b_temp1 + 1);
        reverse = !reverse;
    }
    
    delete [] nums;
    system("pause");
    return 0;
}