iguessyournumber.lua

--"I guess your number" not "guess a number"
function cheat(rsmall,rbig,number)
    local small=rsmall;
    local big=rbig;
    local num=small+(big-small)/2
    for attempt=0,math.ceil(math.log(rbig-rsmall)/math.log(2)),1 do local num=small+(big-small)/2
        io.write("Attempt ",attempt,'/',math.ceil(math.log(rbig-rsmall)/math.log(2)),'\n')
        io.write("N: ",math.floor(num),'\n')
        if (math.floor(num)==number) then io.write(math.floor(num)," = ",math.floor(number),'\n');return true;
        elseif (math.floor(num) < number) then io.write(math.floor(num),"< ",math.floor(number),'\n');small=num;
        elseif (math.floor(num) > number) then io.write(math.floor(num)," > ",math.floor(number),'\n');big=num;
        end
    end
    return false;
end

function main()
io.write("Enter number range\nfrom>");smaller = io.read('*n');
io.write("to>");bigger = io.read('*n');
    local win=false;local attempt=0;local bg=bigger;local sm=smaller
    while(win==false) do attempt=attempt+1; io.write("Attempt ",attempt,'/',math.ceil(math.log(bg-sm) / math.log(2)),'\n')
        if (attempt > math.ceil(math.log(bg-sm) / math.log(2))) then print("I lost");
        io.write("Type your number\n>")if cheat(sm,bg,io.read('*n')) then print("You are a cheater"); end
        return 1;
        end
    n=smaller+(bigger-smaller)/2
    print("i guess",math.floor(n));
    io.write("Is that your number?\n1 - Guess = Number\n2 - Guess < Number\n3 - Guess > Number\n>");
        while(1) do choice= io.read('*n');
            if (choice==1) then win=true; break;
            elseif (choice==2) then smaller=n break
            elseif (choice==3) then bigger=n; break
            else print("Invalid Choice");
            end
        end
    end
    io.write("I guessed it")
    return 0;
end
main()