29.11.17 40a

#include<iostream>
using namespace std;

int main()
{
    int n;
    n = 5;
    int** a = new int*[n];
    for (int i = 0; i < n; i++)
    {
        a[i] = new int[n];
    }
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j<n; j++)
            if (i == j)
            {
                a[i][j] = 1;
            }
            else
            {
                a[i][j] = 0;
            }
    }
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
            cout<< a[i][j] << " ";
        cout<< endl;
    }
    delete[]a;
    system("pause");
    return 0;
}