Databases
StackOverflow2013
Postsdbo
POHow to write a Java-enum-like class with multiple data fields in C++?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to write a Java-enum-like class with multiple data fields in C++?
    primarykey
    data
    text
    <p>Coming from a Java background, I find C++'s enums very lame. I wanted to know how to write Java-like enums (the ones in which the enum values are objects, and can have attributes and methods) in C++.</p> <p>For example, translate the following Java code (a part of it, sufficient to demonstrate the technique) to C++ :</p> <pre><code>public enum Planet { MERCURY (3.303e+23, 2.4397e6), VENUS (4.869e+24, 6.0518e6), EARTH (5.976e+24, 6.37814e6), MARS (6.421e+23, 3.3972e6), JUPITER (1.9e+27, 7.1492e7), SATURN (5.688e+26, 6.0268e7), URANUS (8.686e+25, 2.5559e7), NEPTUNE (1.024e+26, 2.4746e7); private final double mass; // in kilograms private final double radius; // in meters Planet(double mass, double radius) { this.mass = mass; this.radius = radius; } private double mass() { return mass; } private double radius() { return radius; } // universal gravitational constant (m3 kg-1 s-2) public static final double G = 6.67300E-11; double surfaceGravity() { return G * mass / (radius * radius); } double surfaceWeight(double otherMass) { return otherMass * surfaceGravity(); } public static void main(String[] args) { if (args.length != 1) { System.err.println("Usage: java Planet &lt;earth_weight&gt;"); System.exit(-1); } double earthWeight = Double.parseDouble(args[0]); double mass = earthWeight/EARTH.surfaceGravity(); for (Planet p : Planet.values()) System.out.printf("Your weight on %s is %f%n", p, p.surfaceWeight(mass)); } } </code></pre> <p>Any help would be greatly appreciated!</p> <p>Thanks!</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USeinpoklum
    1. USmissingfaktor
    plurals
    1. PL
      singulars
      1. LTLinked
    1. PL
      singulars
      1. LTDuplicate
    2. PL
      singulars
      1. LTLinked
    3. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POHow to write a Java-enum-like class with multiple data fields in C++?
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POHow to write a Java-enum-like class with multiple data fields in C++?
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POHow to write a Java-enum-like class with multiple data fields in C++?
      1. This table or related slice is empty.
      1. VTUpMod
    1. COAs this appears to be a popular question, consider citing the original: http://java.sun.com/j2se/1.5.0/docs/guide/language/enums.html
      singulars
      1. POHow to write a Java-enum-like class with multiple data fields in C++?
      1. UStrashgod
    2. COI had cited it here in the comments. I do not have any idea who deleted the comments here.
      singulars
      1. POHow to write a Java-enum-like class with multiple data fields in C++?
      1. USmissingfaktor
    3. COI am going to expand my answer. I think the answer you got was likely better. But I think my answer is still illustrative of an interesting technique.
      singulars
      1. POHow to write a Java-enum-like class with multiple data fields in C++?
      1. USOmnifarious
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload