Read binary file into 3d float array [duplicate]

I want to read binary file and store data into 3D float array. I've seen some examples for 1D array, but don't know how to expand it to 3D.

#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main()
{
    int N = 1024;
    // allocate 3d array
    float *** stmp = (float ***)malloc(N * sizeof(float**));
    for (int i = 0; i < N; i++) {
        stmp[i] = (float **)malloc(N * sizeof(float *));
        for (int j = 0; j < N; j++) {
            stmp[i][j] = (float *)malloc(N * sizeof(float));
        }
    }
    string path = "Velocity1_inertHIT.bin";
    ifstream infile;
    infile.open(path);


    return 0;
}