[tedaimlocks]

How can i make something to keep trace of kills for each player?

#include <amxmodx>
#include <amxmisc>
#include <fun>
#include <cstrike>
#include <zp_buymenu>
#include <colorchat>
#include <zombieplague>

#define PLUGIN "Quests"
#define VERSION "1.0"
#define AUTHOR "tedaimlocks"

new FiveKillsMission[32];
new FiveInfectionsMission[32];

new FiveKillsMissionReward = 15000;
new FiveInfectionsMissionReward = 15000;

new bool:FinishedMission[32] = false;
new bool:HasChosenMission[32] = false;

public plugin_init() {
	register_plugin(PLUGIN, VERSION, AUTHOR)
        register_logevent("logevent_RoundStart", 2, "1=Round_Start");
        register_logevent("logevent_RoundEnd", 2, "1=Round_End");
}

public QuestsMenu(id) {
	new menu = menu_create("\ySPK - Zombie Plague \r[CSO] \d | Quests", "QuestsMenuHandler")
	menu_additem(menu, "\wKill \r5 \wZombies \d[\wReward: \y$\r15K\d]", "1")
	menu_additem(menu, "\wInfect \r5 \wHumans \d[\wReward: \y$\r15K\d]", "2")
        menu_setprop(menu, MPROP_EXITNAME, "Exit");
	menu_display(id, menu)
}

public QuestsMenuHandler(id, menu, item) {
    switch(item) {
        case 0: {
            if(is_user_alive(id))
                QuestMenu5Kills(id);
            else
                return PLUGIN_HANDLED;
        }
        case 1: {
            if(is_user_alive(id))
                QuestMenu5Infections(id);
            else
                return PLUGIN_HANDLED;
        }
    }
    return PLUGIN_CONTINUE;
}

public QuestMenu5Kills(id) {
    set_hudmessage(255, 255, 0, -1.0, -1.0, 0, 6.0, 2.0)
    show_hudmessage(id, "Mission: Kill 5 Zombies^nReward: 15000$")
    HasChosenMission[id] = true
}

public QuestMenu5Infections(id) {
    set_hudmessage(255, 255, 0, -1.0, -1.0, 0, 6.0, 2.0)
    show_hudmessage(id, "Mission: Infect 5 Humans^nReward: 15000$")
    HasChosenMission[id] = true
}

public logevent_RoundStart() {
    for(new i = 1; i <= get_maxplayers(); i++) {
         if(is_user_connected(i) && is_user_alive(i) && !is_user_bot(i)) {
            QuestsMenu(i);
        }
    }
}

public logevent_RoundEnd(id) {
    if(FinishedMission[id] && FiveKillsMission[id] && HasChosenMission[id]) {
        set_hudmessage(50, 255, 0, -1.0, -1.0, 0, 6.0, 2.0)
        show_hudmessage(id, "Mission Completed")
        zp_cs_set_user_money(id, zp_cs_get_user_money(id) + FiveKillsMissionReward);
    }
    else if(FinishedMission[id] && FiveInfectionsMission[id] && HasChosenMission[id]) {
        set_hudmessage(50, 255, 0, -1.0, -1.0, 0, 6.0, 2.0)
        show_hudmessage(id, "Mission Completed")
        zp_cs_set_user_money(id, zp_cs_get_user_money(id) + FiveInfectionsMissionReward);
    }
    else if(HasChosenMission[id]) {
        set_hudmessage(255, 0, 0, -1.0, -1.0, 0, 6.0, 2.0)
        show_hudmessage(id, "Mission Failed")
    }
    else {
        return PLUGIN_HANDLED;
    }
    return PLUGIN_HANDLED;
}