Malloc a 3-Dimensional array in C?

Question

I\'m translating some MATLAB code into C and the script I\'m converting makes heavy use of 3D arrays with 10*100*300 complex entries. The size of the array also depends on t

Answer 1

Are you sure you need to use malloc? C allows creating of multidimentional arrays natively:

int a2[57][13][7];

Or you can use malloc in the following way:

int (*a)[13][7]; // imitates 3d array with unset 3rd dimension
                 // actually it is a pointer to 2d arrays

a = malloc(57 * sizeof *a);    // allocates 57 rows

a[35][7][3] = 12; // accessing element is conventional

free(a); // freeing memory