I'm a fresher here who has just finished the matlab onramp course but unable is stuck at the practise problem.

Question:Given two input variables r and h, which stand for the radius and height of a cake, calculate the surface area of the cake you need to put frosting on (all around the sides and the top).And this is my answer:

function SA = func_frosting(r, h)

SA = (pi * r * r) + (2 * pi * r * h);

end

radius = 5;

height = 10;

surfaceArea = func_frosting(radius, height);

disp(['The surface area of the cake is ', num2str(surfaceArea), ]);

But it just passes one of the four code test.Please help.

[John D'Errico]

You don't tell us what it failed. Is the mathematics correct? Is the code correct?

The area of the top would be the area of a circle of radius r, so pi*r^2.

The area of the sides would be the perimeter length of a circle of radius r, times the height. So 2*pi*r*h.

Therefore you seem to have computed the area correctly. You wrote a function that takes as arguments r and h. It returns the surface area.

What it failed, we do not know, and we cannot see into your computer. I might make a wild guess that you fixed the radius at 5 and the height at 10. So you may be preventing the code from being called with other values for r and h. Can I know anything? No. So if you want help, you need to tell us what was the issue, not just that it did not work some if the time.

I might complain that any chef of merit would be far more interested in the volume of frosting, not the area. But that would not be pertinent to your problem.

[SL: fixed typo]

[Steven Lord]

Are you trying to solve Cody problem 44943? If so Cody should have showed you a message about which of its tests your code failed to satisfy. That information would be useful in offering suggestions for how to modify your code so it passes Cody's tests.

[Venkatesha AT]

What you have entered in first 3 lines is enough to solve all the 4 tests. Remove the extra lines.

function SA = func_frosting(r,h)
  SA = (pi*r^2) + (2*pi*r*h);
end

Answer 1

[SACHIN KHANDELWAL]

Hi @Divya

I've tried solving the same Cody problem that you're working on, and it works perfectly on my end. Here's the MATLAB code that's working for me:

function SA = func_frosting(r,h)
  SA = pi*r*r + 2*pi*r*h;
end

The test cases are failing because there's extra, unnecessary code inside your solution. The test function checks the output of the "func_frosting" function. It compares what we expect the function to return (expected output) with what it actually returns (actual output).

Hope this is helpful!

[Divya]

I got it correct now.Thanks for your answer.