#include <stdio.h>
#include <stdlib.h>

#define M_ROWS 20
#define M_COLS 30
#define D_FORMAT "%8.3f"

void printDoubleMatrix(double **mtx, int rows, int cols)
{
    printf("%8.3f", mtx[2][2]);
}

void generateMatrix(double ***mtx, int rows, int cols)
{
    *mtx = (double **)calloc(rows, sizeof(double *));
    int i = 0, j = 0;

    if(!mtx)
    {
        printf("mtx == NULL\n");
        return;
    }

    for(i = 0; i < rows; i++)
    {
        (*mtx)[i] = (double *)calloc(cols, sizeof(double));

        for(j = 0; j < cols; j++)
        {
            (*mtx)[i][j] = (i * j - 1);
        }
    }
}

int main(int argc, char* argv[])
{
    double **Matrix = NULL;
    generateMatrix(&Matrix, 4, 5);
    printDoubleMatrix(Matrix, 4, 5);
    return 0;
}