lol..
You have csstats natives , no need to count by yourself ...
PHP Code:
#include <amxmodx>
#include <csstats>
public plugin_init()
{
register_event("DeathMsg", "Morte", "a");
}
public Morte()
{
new morto = read_data(2)
if(!is_user_connected(morto)) return;
new Stats[8],Body[8];
get_user_vstats(morto, 0, Stats, Body);
set_hudmessage(255, 0,0, 1.0, 1.0, 0, 0.0, 1.0 + 0.1, 0.0, 0.0, -1);
show_hudmessage(morto, "[STATS] You did %d damage.", Stats[6]);
}