subject area of cirlce.

Comments

• HK_MP5KPDW

  June 2006

  : what is meaning of double-precision in the following question?
  : [blue]
  : 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.? [/blue]
  :
  : and what will be the value of radius in above question?
  : Talha Nasir
  :
  :
  
  [green]Use [italic]double[/italic] variables as opposed to [italic]float[/italic] for [italic]radius[/italic] and [italic]area[/italic]. How the heck do I know what the value of radius is going to be? I'm not clairvoyant/omniscient.[/green]
  
• IDK

  June 2006

  : : what is meaning of double-precision in the following question?
  : : [blue]
  : : 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.? [/blue]
  : :
  : : 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)
  
• zeolite

  June 2006

  That should be exactly what you need:[CODE]double AreaOfCircle(double radius)
  {
  return 3.14159 * radius * radius;
  }[/CODE]
  
  : what is meaning of double-precision in the following question?
  : [blue]
  : 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.? [/blue]
  :
  : and what will be the value of radius in above question?
  : Talha Nasir
  :
  :
  
• FDrache

  June 2006

  : That should be exactly what you need:[CODE]double AreaOfCircle(double radius)
  : {
  : return 3.14159 * radius * radius;
  : }[/CODE]
  :
  
  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.