Vipknife

#include <amxmodx>
#include <amxmisc>
#include <hamsandwich>

#define VIP_FLAG "a"
#define is_vip(%0)  (get_user_flags(%0)==read_flags(VIP_FLAG))

#define HELPER_FLAGS "bceij"
#define is_helper(%0)   (get_user_flags(%0)&read_flags(HELPER_FLAGS))

new bool:vk[33],bool:hk[33]

public plugin_init() {
    register_clcmd("say /vipknife","VK")
    register_clcmd("say_team /vipknife","VK")

    register_clcmd("say /helperknife","HK")
    register_clcmd("say_team /helperknife","HK")

    RegisterHam( Ham_TakeDamage, "player", "Player_TakeDamage" );
}

public VK(id)
{
    if(!is_vip(id)) return

    vk[id]=true

    engclient_cmd(id,"weapon_knife")
}

public HK(id)
{
    if(!is_vip(id)) return

    hk[id]=true

    engclient_cmd(id,"weapon_knife")
}

public Player_TakeDamage( iVictim, iInflictor, iAttacker, Float:fDamage )
{
    if(!is_user_alive(iAttacker)||iInflictor != iAttacker||get_user_weapon( iAttacker ) != CSW_KNIFE)   return HAM_IGNORED

    if( vk[iAttacker] )
    {
        SetHamParamFloat( 4, fDamage * 1.55 );
        return HAM_HANDLED;
    }

    if( hk[iAttacker] )
    {
        SetHamParamFloat( 4, fDamage * 1.50 );
        return HAM_HANDLED;
    }

    return HAM_IGNORED;
}