[miokie]

using Dcmd & Sscanf:

pawn Код:

dcmd_BuySeed(playerid, params[])
{
    new SeedType;
    if(sscanf(params, "d", SeedType)) return SendClientMessage(playerid, ERROR_COLOR, "Usage: /BuySeed [Seed Number]");
    else if(SeedType <=0 || SeedType >=4) return SendClientMessage(playerid, ERROR_COLOR,"Choose a valid seed number!");
    else if(SeedType == 1)
    {
        //Do Something
    }
    else if(SeedType == 2)
    {
        //Do Something
    }
    else if(SeedType == 3)
    {
        //Do Something
    }
    return 1;
}

UNTESTED.

But something along the lines of that I guess...