what is meaning of double-precision in the following question?

Write a function that returns the double-precision area of a circle, given the double precision radius passed to it. The formula to calculate the radius of a circle is .

area = 3.14159 * radius * radius.

what will be the value of radius.?

and what will be the value of radius in above question?
Talha Nasir

: what is meaning of double-precision in the following question?
:
: Write a function that returns the double-precision area of a circle, given the double precision radius passed to it. The formula to calculate the radius of a circle is .
:
: area = 3.14159 * radius * radius.
:
: what will be the value of radius.?
:
: and what will be the value of radius in above question?
: Talha Nasir
:
:

Use double variables as opposed to float for radius and area. How the heck do I know what the value of radius is going to be? I'm not clairvoyant/omniscient.

: : what is meaning of double-precision in the following question?
: :
: : Write a function that returns the double-precision area of a circle, given the double precision radius passed to it. The formula to calculate the radius of a circle is .
: :
: : area = 3.14159 * radius * radius.
: :
: : what will be the value of radius.?
: :
: : and what will be the value of radius in above question?
: : Talha Nasir
: :
: :
: How the heck do I know what the value of radius is going to be? I'm not clairvoyant/omniscient.[/green]
:
With some math it should be:
raduis = sqrt(area / 3.14159)

That should be exactly what you need:

double AreaOfCircle(double radius)
{
  return 3.14159 * radius * radius;
}

: what is meaning of double-precision in the following question?
:
: Write a function that returns the double-precision area of a circle, given the double precision radius passed to it. The formula to calculate the radius of a circle is .
:
: area = 3.14159 * radius * radius.
:
: what will be the value of radius.?
:
: and what will be the value of radius in above question?
: Talha Nasir
:
:

: That should be exactly what you need:

double AreaOfCircle(double radius)
: {
:   return 3.14159 * radius * radius;
: }

:

That's it! And to be exact, define and take
const double pi = 2.0 * acos(0.0); // 2*arccosine(0)
because pi is usually not defined in C libraries.
FDrache.