[LinLinLin]

no error and print four time in game.

PHP Code:

enum chancetype
{
    chance_a = 0,
    chance_b,
    chance_c,
    chance_total
};

enum struct Eplayer
{
    float a;
    float chance[view_as<chancetype>(chance_total)];
}

public void OnClientPutInServer(int client)
{
    if( IsFakeClient(client) )
        return;

    Eplayer a;
    for(int i = 0; i <= sizeof( a.chance ); i++)
    {
        PrintToChat(client,"sizeof : %d",i);
    }
} 


and this is in wiki.

To allow implicit conversions of enums back to integers (that is, so functions expecting a value of type 'int' accepts it as one instead of generating a warning), the enum must either be anonymous (unnamed) or must start with a lowercase character.

so if you want to use an enum as an array size, don't set it's name or just use lowercas character in start.