I am trying to calculate overall cost but it keeps ending on the starting line 'overallcost' and not running im not sure what im doing wrong.

It runs asking the user to input cost and earlier in my code it works out the areas of each space. I tried to make it say the total costs for each type of space but it doesnt load up. I then also tried to load the overall cost but it wont load past the individual space costs. (Sorry its long)

choice9 = questdlg('Would you like to calculate costs for spaces?','question','yes','no','yes');

switch choice9

case 'no'

disp('not calculating cost')

case 'yes'

ResidentialCost=input('Please enter the building cost for residential spaces per m^2: ');

OfficeCost=input('Please enter the building cost for office spaces per m^2: ');

EducationalCost=input('Please enter the building cost for educational spaces per m^2: ');

ToiletCost=input('Please enter the building cost for toilet spaces per m^2: ');

StorageCost=input('Please enter the building cost for Storage spaces per m^2: ');

if ResidentialArea<=0 || ResidentialCost<=0

disp('No cost for residential spaces')

else

TotalResidentialCost= ResidentialCost*ResidentialArea;

disp('Your total cost for residential spaces is:'+TotalResidentialCost)

end

if OfficeArea<=0 || OfficeCost<=0

disp('No cost for office spaces')

else

TotalOfficeCost= OfficeCost*OfficeArea;

disp('Your total cost for office spaces is:'+TotalOfficeCost)

end

if EducationalArea<=0 || EducationalCost<=0

disp('No cost for educational spaces')

else

TotalEducationalCost= EducationalCost*EducationalArea;

disp('Your total cost for educational spaces is:'+TotalEducationalCost)

end

if ToiletArea<=0 || ToiletCost<=0

disp('No cost for educational spaces')

else

TotalToiletCost= ToiletCost*ToiletArea;

disp('Your total cost for toilet spaces is:'+TotalToiletCost)

end

if StorageArea<=0 || StorageCost<=0

disp('No cost for storage spaces:')

else

TotalStorageCost= StorageCost*StorageArea;

disp('Your total cost for storage spaces is:'+TotalStorageCost)

end

OverallCost=TotalStorageCost+TotalToiletCost+TotalEducationalCost+TotalOfficeCost+TotalResidentialCost+0;

disp('Your running total is: '+OverallCost)

end

end

Answer 1

[Voss]

It may be that one or more of TotalResidentialCost and the other "total cost" variables are undefined, because the corresponding area is <= 0 or the inputted cost is <= 0:

ResidentialArea = 0; % suppose the user entered 0 for this

if ResidentialArea<=0 || ResidentialCost<=0
    disp('No cost for residential spaces')
else
    TotalResidentialCost= ResidentialCost*ResidentialArea;
    disp('Your total cost for residential spaces is:'+TotalResidentialCost)
end

No cost for residential spaces

whos('TotalResidentialCost') % then no variable with this name exists here

So you'll get an error when trying to add up all the total costs later.

TotalResidentialCost and the other "total cost" variables have to be defined, even if they're going to be 0:

if ResidentialArea<=0 || ResidentialCost<=0
    TotalResidentialCost = 0;
    disp('No cost for residential spaces')
else
    TotalResidentialCost= ResidentialCost*ResidentialArea;
    disp('Your total cost for residential spaces is:'+TotalResidentialCost)
end

No cost for residential spaces

whos('TotalResidentialCost') % now this variable exists

  Name                      Size            Bytes  Class     Attributes

  TotalResidentialCost      1x1                 8  double              

Another thing you'll want to fix is: don't use + with character vectors because your output will look like this:

disp('total cost is: '+100)

   216   211   216   197   208   132   199   211   215   216   132   205   215   158   132

Instead use strings and +, or use character vectors and another method:

disp("total cost is: "+100) % strings use "" and +

total cost is: 100

disp(sprintf('total cost is: %.2f',100))

total cost is: 100.00

disp(['total cost is: ' num2str(100)])

total cost is: 100