#include <stdio.h>

#define N 3

int **vynasob(int m1[][N], int k)
{
    int i, j;

    int **m2 = (int *)malloc(N*sizeof(int));

    for (i = 0; i < N; i++)
    {
        m2[i] = (int *)malloc(N*sizeof(int));
    }

    for (i = 0; i < N; i++)
    {
        for (j = 0; j < N; j++)
        {
            if (j < i)
                m2[i][j] = 0;
            else
                m2[i][j] = m1[i][j] * k;
        }
    }

    return m2;
}

int main()
{
    int m1[N][N] = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } };
    int i, j;

    int **m2 = vynasob(m1, 1);

    for (i = 0; i < N; i++)
    {
        for (j = 0; j < N; j++)
        {
            printf("%d ", m2[i][j]);
        }
        printf("\n\n");
    }

    getchar();

    return 0;
}