When I run the code of area.m it says'Attempt to reference field of non-structure array.'

The code for area.m is

radius = input('Enter the value of the radius');
[ a c ] = myfunc(radius);
fprintf('For the circle with radius of %0.1f ,\n',radius);
fprintf('the area is %0.1f and the circumfrence is %0.1f,\n',a,c);

The code for myfunc is

function [a c] = myfunc(radius)
a = 3.14 * radius* radius;
c = 2*3.14*radius;

Looking for a quick reply,

Thanks

Answer 1

[Wayne King]

area.m is a MATLAB function, so you should not name your script area

rename your script circarea.m.

Then make sure you save your function myfunc.m in a folder that is on the MATLAB path. For example, if your folder name is c:\mfiles, you can add this path with

    >>addpath 'c:\mfiles'

or by using the pathtool

    >>pathtool

Also, FYI. MATLAB understands pi:

function [a c] = myfunc(radius) 
  a = pi*radius^2; 
  c = 2*pi*radius;
end

Answer 2

[Walter Roberson]

In addition to what Wayne says:

That particular error message is typical when people use the ".m" extension when they evaluate a function or script:

area.m     %WRONG

area       %right