MATLAB: How to create a for/ while loop until a condition is met

else iffor loopif statementmenuwhile loop

I'm creating a function to determine the cost of parking at an airport. I have specific time requirements for the time parked and the related cost. My question is how can I change my time=input line to incorporate weeks, hours, days, and mins. Also for each lot there is a daily maximum which once you reach you can't be charge any more that day. How do I change my code to account for multiple days in the same lot? Please let me know if you have any questions about what I am asking.
Short Term Parking Lot
Duration Cost
| 0-30 min | Free (day 1 only)
| 31-60 min | $2.00
| Each additional hour | $1.00
| Daily maximum | $14.00 
function parking_meter 
%This function gives you the total cost of parking for airfair for 4 types of parking lots at Northwest Arkansas Regional  
%To determine the cost of the parking the user will then select a parking
%lot
cost=menu('Select a parking lot to calculate your parking cost, a', 'Short Term','Intermediate', 'Long Term', 'Economy')
switch cost
    case 1
        time=input('input the duration you parked in minutes \n')
        if 0<=time && time<=30
            disp('Free for one day')
        elseif 31<=time && time<=60
            disp('$2.00')
        elseif time > 60 
            a_cost=time./60*1;
            cost= 2+a_cost;
            disp(cost) 
        end
        %How do you incorporate the daily maximum of $14 11 additonal hours 
        ...........
end

Best Answer

You can use the min function to enforce a maximum outcome.
max_cost_allowed=14;
cost=min(cost,max_cost_allowed);
As a more general remark, it would make more sense to me to decouple the cost calculation from the input. That way you can more easily convert your code to a GUI if you want to and you are more free to play around with the input method.
function parking_cost
lot_type='Short Term';
a=input(['parking time in day,hour,minute format\n',...
    '(you can skip leading zeros)\n'],'s');
b=regexp(a,'\d*','match');
c=cellfun(@str2double,b);
%fill c with zeros as needed
if numel(c)<3
    c=[zeros(1,3-numel(c)) c];
end
time=24*60*c(1)+60*c(2)+c(3);
cost=parking_meter(lot_type,time);
if cost==0
    fprintf('parking is free\n')
else
    fprintf('total cost is $%.2f\n',cost)
end
end
function cost=parking_meter(lot_type,time)
%This function gives you the total cost of parking for airfair for 4 types
%of parking lots at Northwest Arkansas Regional
%types allowed: 'Short Term','Intermediate', 'Long Term', 'Economy'
%time should be entered in minutes
switch lot_type
    case 'Short Term'
        if 0<=time && time<=30
            cost=0;
        elseif 31<=time && time<=60
            cost=2;
        else
            %first hour is $2, each additional is $1
            cost=1+ceil(time/60);
            nth_days=1+floor(time/(60*24));
            %daily max $14
            cost=min(cost,14*nth_days);
        end
end
end
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