[Aerotactics]

Try something like this:

Not Tested.

pawn Код:

//somewhere at top of script
new Convoy = 0;

//Your command
COMMAND:createconvoy(playerid, params[])
{
    new string[64], text[128], number[25];
    new File:convoys = fopen("ConvoyIDs.txt", io_read);
    if(convoys)
    {
        Convoy++; //adds 1 each time
        fread(convoys, string);
        format(number, sizeof(number), "%d", Convoy);
        fwrite(convoys, number);
        
        PlayerInfo[playerid][pConvoy] = Convoy;
        
        fclose(convoys);
        
        format(text, sizeof(text), "Convoy with ID %d has been created", Convoy);
        
        print(text);
        

    }
    return 1;
}