¿Is this program correct and well written?

Hello everyone, I need some help, I've just written the following code but I don't know if this is written correctly according to the text. I hope you can see if there are mistakes.

Sorry, english is not my native language.

TEXT:

A computer provider offers 10% discount, if the product costs $ 1 million or more. Also, independently offers a 5% discount if the brand is ABACO. Determine how much will pay a client for purchasing a computer, including tax.

TAX=Product Price * 0.16

CODE:

clear all
clc
M = input('Enter de computer''s brand: ', 's');
P = input('Enter the computer''s price: ');
TAX = P*0.16;
ABACO = 0.05;
  if M==ABACO;
  PA=P-(P*ABACO)+TAX;
  fprintf('The purchase price is %d.\n',PA)
elseif M~=ABACO;
  PB=P+TAX;
  fprintf('The purchase price is %d.\n',PB)
elseif P>=1000000;
  PC=P-(P*0.1)+TAX;
  fprintf('The purchase price is %d.\n',PC)
end

Thanks.

[Arthur]

Any reason to assume that's not correct? Does it work?

[José-Luis]

This is homework. Your program is incorrect. Here is a pointer:

 M == ABACO

makes no sense, you are comparing a string to a scalar. While that might have its uses, I am pretty sure that is not what you intended to do. You might want to look into strcmp

[Ilham Hardy]

And there should be PD. If ABACO and P>=1e6

another hint:

doc strcmpi

[Jan]

Do not "clear all", when you want to "clear variables". Removing all loaded functions from the memory is a brute waste of time.

[Jimmy]

Thanks everybody, I just did this with strcmpi and it works.

[Sean de Wolski]

And using input will get old after about two iterations. Either use a function to accept inputs or use an inputdlg.

[Jimmy]

How can I implement inputdlg into this code?

[Evan]

Replace the calls to "input" with "inputdlg."

You could make things simpler by getting both inputs from the same dialog box. Just pass a cell array that contains your two fields to inputdlg, like so:

D = inputdlg({'Enter de computer''s brand:','Enter the computer''s price:'});

The data will be returned as a cell array of strings, so you'll have to get it in the form you're using:

M = D{1};
P = str2double(D{2});

To learn more about input dialog boxes:

   help inputdlg

[Jimmy]

Awesome Evan, thanks.

[Evan]

No prob. :)

Answer 1

[Image Analyst]

I can see you're eventually going to need to know this FAQ entry: http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F because you're comparing floating point numbers.