In Turing write a program that prompts for the radius of a circle then calculates and outputs the circumference?

Answer 1

I'm not sure how you'd do this in C++, but I could have a go at it in php since that's what I know.

You know that Pi is approximately 22/7, in php you can use the pi function.

You'd need your input(radius) to come from a form if it was web-based, which is simple enough.

perimeter = 2nr = 2 x (22/7) x r

function getPerimeter ($input) {

$input = $_GET['formInput'];

$pi=pi();

$perimeter = (2*$pi)*$input;

return $perimeter;

}

HTH

Answer 2

I did a little dummy-proofing and added a loop so you can redo it as many times as you need to

var radius : string

var circumference : real

var radius_value : real

var retry : string

loop

loop

%getting the radius

put "Please give the radius of the circle"

get radius

%checking if the given radius will be ok

if strrealok (radius) then

exit

else

delay (500)

put "Please put a valid radius"

end if

end loop

%converting radius string to radius real

radius_value := strreal (radius)

%calculating circumference

circumference := radius_value*2*3.14

%outputting final results

delay (500)

put "The circumference of your circle is ",circumference, "(unit of measurement)"

delay (500)

put "Do you wish to calculate another answer? (y or n)"

get retry

if retry = "n" then

exit

end if

end loop