Initialize mulitdimensional C-array with 0 elements

Question

How could I simple initialize a multidimensional C-array with 0 elements like this:

int a[2][2] = { { 0, 0 }, {0, 0} }

Answer 1

This should work:

int a[2][2] = {0};

EDIT This trick may work for silencing the warning:

int a[2][2] = {{0}};

Answer 2

Use memset:

memset(a,0,sizeof a);