[RedJohn]

pawn Код:

public OnPlayerDeath(playerid, killerid, reason)
{
    new PlayerName[MAX_PLAYER_NAME], KillerName[MAX_PLAYER_NAME], string[128];
    GetPlayerName(playerid, PlayerName, sizeof(PlayerName));
    GetPlayerName(killerid, KillerName, sizeof(KillerName));
    format(string, sizeof(string), "%s has been killed by %s!", PlayerName, KillerName);
    SendClientMessageToAll(0xFFFFFFFF, string);
    pInfo[playerid][pDeaths]++;
    pInfo[killerid][pKills]++;
    return 1;
}

++ = Increases by 1.

EDIT: Why don't you use THIS instead of:

pawn Код:

new PlayerName[MAX_PLAYER_NAME], KillerName[MAX_PLAYER_NAME], string[128];
GetPlayerName(playerid, PlayerName, sizeof(PlayerName));
GetPlayerName(killerid, KillerName, sizeof(KillerName));
format(string, sizeof(string), "%s has been killed by %s!", PlayerName, KillerName);
SendClientMessageToAll(0xFFFFFFFF, string);