[zmd94]

Then, just use this code:

PHP Code:

#include <amxmodx>
#include <zombieplague>

#define PLUGIN "[ZP] "
#define VERSION "2.1"
#define AUTHOR ""

#define ZP_TEAM_HUMAN (1<<1)

new const g_item_nem_name[] = "Buy Nemesis"
new const g_item_sur_name[] = "Buy Survivor"
new const g_costnemesis = 140
new const g_costsurvivor = 200

new g_maxplayers, g_msgSayText
new g_nemesis, g_survivor
new g_buyable, g_endround, RoundCount, cvar_delay

public plugin_init()
{
    register_plugin(PLUGIN, VERSION, AUTHOR)
    
    register_event("HLTV", "event_round_start", "a", "1=0", "2=0")
    register_logevent("logevent_round_end", 2, "1=Round_End")
    
    g_nemesis = zp_register_extra_item(g_item_nem_name, g_costnemesis, ZP_TEAM_HUMAN)
    g_survivor = zp_register_extra_item(g_item_sur_name, g_costsurvivor, ZP_TEAM_HUMAN)
    
    cvar_delay = register_cvar("zp_buy_classes_delay", "3") 
    
    g_maxplayers = get_maxplayers()
    g_msgSayText = get_user_msgid("SayText")
}

public zp_extra_item_selected(player, itemid)
{
    if(itemid == g_nemesis)
    {
        if (!g_buyable)
        {
            if (RoundCount == get_pcvar_num(cvar_delay))
            {
                zp_colored_print(player, "^x04[ZP]^x01 You have to wait^x04 one^x01 more round before you can buy this item")
            }
            else
            {
                zp_colored_print(player, "^x04[ZP]^x01 You have to wait^x04 %d^x01 rounds until you can buy this item", get_pcvar_num(cvar_delay) - RoundCount + 1)
            }
            return ZP_PLUGIN_HANDLED;
        }
        
        if (zp_has_round_started() == 1 || g_endround)
        {
            zp_colored_print(player, "^x04[ZP]^x01 This item can only be bought before the round mode starts")
            return ZP_PLUGIN_HANDLED;
        }  
        
        zp_make_user_nemesis(player)
        
        new name[32]
        get_user_name(player, name, charsmax(name))
        zp_colored_print(0, "^x04[ReverseZM]^x03 %s^x01 has bought^x04 Nemesis", name) 
        
        g_buyable = false
    }
    else if(itemid == g_survivor)
    {
        if (!g_buyable)
        {
            if (RoundCount == get_pcvar_num(cvar_delay))
            {
                zp_colored_print(player, "^x04[ZP]^x01 You have to wait^x04 one^x01 more round before you can buy this item")
            }
            else
            {
                zp_colored_print(player, "^x04[ZP]^x01 You have to wait^x04 %d^x01 rounds until you can buy this item", get_pcvar_num(cvar_delay) - RoundCount + 1)
            }
            return ZP_PLUGIN_HANDLED;
        }
        
        if (zp_has_round_started() == 1 || g_endround)
        {
            zp_colored_print(player, "^x04[ZP]^x01 This item can only be bought before the round mode starts")
            return ZP_PLUGIN_HANDLED;
        }
        
        zp_make_user_survivor(player)
        
        new name[32]
        get_user_name(player, name, charsmax(name))
        zp_colored_print(0, "^x04[ReverseZM]^x03 %s^x01 has bought^x04 Survivor", name)  
        
        g_buyable = false
        
    }   
    return PLUGIN_CONTINUE
}

public event_round_start()
{
    g_endround = false
    
    if (RoundCount >= get_pcvar_num(cvar_delay))
    {
        g_buyable = true
        RoundCount = 0
    }
}

public logevent_round_end()
{
    g_endround = true
    
    RoundCount++
}

zp_colored_print(target, const message[], any:...)
{
    static buffer[512], i, argscount
    argscount = numargs()

    // Send to everyone
    if (!target)
    {
        static player
        for (player = 1; player <= g_maxplayers; player++)
        {
            // Not connected
            if (!is_user_connected(player))
                continue;
            
            // Remember changed arguments
            static changed[5], changedcount // [5] = max LANG_PLAYER occurencies
            changedcount = 0
            
            // Replace LANG_PLAYER with player id
            for (i = 2; i < argscount; i++)
            {
                if (getarg(i) == LANG_PLAYER)
                {
                    setarg(i, 0, player)
                    changed[changedcount] = i
                    changedcount++
                }
            }
            
            // Format message for player
            vformat(buffer, charsmax(buffer), message, 3)
            
            // Send it
            message_begin(MSG_ONE_UNRELIABLE, g_msgSayText, _, player)
            write_byte(player)
            write_string(buffer)
            message_end()
            
            // Replace back player id's with LANG_PLAYER
            for (i = 0; i < changedcount; i++)
                setarg(changed[i], 0, LANG_PLAYER)
        }
    }
    // Send to specific target
    else
    {
        // Format message for player
        vformat(buffer, charsmax(buffer), message, 3)
        
        // Send it
        message_begin(MSG_ONE, g_msgSayText, _, target)
        write_byte(target)
        write_string(buffer)
        message_end()
    }
} 


No need to add code in public zp_round_started(mode, id). So, just remove it.