cannot specify explicit initializer for arrays

As everyone else was saying, set the properties of my class to static const and then define them in the cpp file for the class:

header file:

class Player
{
public:
    Player();
    ~Player();

    float x;
    float y;
    float z;
    float velocity;

    static const unsigned short indices[ 6 ];
    static const VertexPositionColor vertices[ 4 ];
};

cpp:

const unsigned short Player::indices[ 6 ] = {
    3, 1, 0,
    4, 2, 1
};

const VertexPositionColor Player::vertices[ 4 ] = {
    { XMFLOAT3( -0.5f, -0.5f, -0.5f ), XMFLOAT3( 0.0f, 0.0f, 0.0f ) },
    { XMFLOAT3( -0.5f, 0.5f, -0.5f ), XMFLOAT3( 0.0f, 0.0f, 1.0f ) },
    { XMFLOAT3( 0.5f, -0.5f, -0.5f ), XMFLOAT3( 0.0f, 1.0f, 0.0f ) },
    { XMFLOAT3( 0.5f, 0.5f, -0.5f ), XMFLOAT3( 0.0f, 1.0f, 1.0f ) }
}