c++11 using std::fill to fill a 2D dynamically allocated array

A discussion along this line could be found in this question and also in here, but my case is slightly different, as I am dealing with a dynamically allocated memory.

also please note, memset does not quite work with double value.

Anyway, I am trying to use std::fill to fill a dynamically allocated 2D array --

#include <iostream>
#include <algorithm>

using std::cout ; using std::endl ;
using std::fill ;

int main()
{
    double **data ;
    int row = 10, col = 10 ;
    data = new double*[row] ;
    for(int i = 0 ; i < col ; i++)
        data[i] = new double[col];

    // fill(&(data[0][0]), 
    //      &(data[0][0]) + (row * col * sizeof(double)), 1); // approach 1
    // fill(&(data[0][0]), &(data[0][0]) + (row * col), 1);   // approach 2
    // fill(data, data + (row * col * sizeof(double)), 1);    // approach 3
    // fill(&(data[0][0]), 
    //      &(data[0][0]) + 
    //       ((row * sizeof(double*)) + 
    //        (col * sizeof(double))), 1);                    // approach 4

    for(int i = 0 ; i < row ; i++) {
        for(int j = 0 ; j < col ; j++)
            cout << data[i][j] << " " ;
        cout << endl ;
    }

    for(int i = 0 ; i < row ; i++)
        delete [] data[i] ;
    delete [] data ;
}

Approach 1: What I understand, the approach 1 should be the correct code, I am starting from the beginning &(data[0][0]) and the end of the array should be located at &(data[0][0]) + (row * col * sizeof(double)), but when I run, I get this error, but the array has been filled --

1 1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 1 
*** Error in `./test': free(): invalid next size (fast): 0x0000000000da3070 ***
Aborted (core dumped)

Approrach 2: However, according to this post, the approach 2 is recommended, but I do not quite understand this code, since sizeof(double) is missing, and I am getting this output --

1 1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 1 
1 1 1 1 1 1 1 1 1 1 
1 1 1 1 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
*** Error in `./test': free(): invalid next size (fast): 0x0000000000bf5070 ***
Aborted (core dumped)

Approach 3: I am not sure why this does not compile, data and &(data[0][0]) should have the same meaning, right?

Approach 4: I am not sure if this is correct or not.

1. How do I do it ?
2. Does std::fill give any extra benefit over two nested loops?