enumeration data type in c and c++

Replies

• 

  Ankita Katdare

  @Nikumbh: Sure. What do you want to know about it?
• 

  Nikumbh

  AbraKaDabra

  @Nikumbh: Sure. What do you want to know about it?

  I want to know what is the use of enumeration tag.
• 

  Nikumbh

  I want to know the use of enum data type
• 

  Ankita Katdare

  Very well, 'Enum' data type variables takes values which have been previously declared.
  With an Enum, you can specify a number of valid values for that variable and descriptive constant names for the values of the Enum. These values are used instead of constants.
  
  In C:
  
  For example:
  
  

  enum month 
  { 
  jan=1, feb=2, mar=3, apr=4, may=5, jun=6, jul=7, aug=8, sep=9, oct=10, nov=11, dec=12
  };     
  enum month this_month;      
  
  this_month = aug;    

  Here 'month' is declared as the enumerated data type.
  It consists of a set of values, jan to dec. Numerically, jan is given the value 1, feb the value 2, and so on.
  The variable 'this_month' is declared to be of the same type as 'month'.
• 

  Nikumbh

  Is that necessary to have enum data type....?
• 

  ayusha patnaik

  can any one suggest me a good and easy book for object oriented programming for c++?
• 

  TheV

  I am explain a little more..
  
  When we write a number of related constant with sequencial values like I want to assign names of the color(red,green,yellow,white,black,blue,orange) with 1 to 7 then instead of writing ..
  
  

  int red=1;
  int green =2;
  int yellow =3;
  ........
  ........
  int orange = 7;

  we write ....
  
  

  enum color{
  red,green,yellow,white,black,blue,orange
  };

  here we didnot initialize any color with any number. It is automatically initialize from 0 to 6. But we want to initialize from 1 to 7 so we just initialize
  the first color i.e. red to 1 and the remaining automatically initializes from 2 to 7 . As..
  

  enum color{
  red=1,green,yellow,white,black,blue,orange
  };

  Again explaining little more...if we initialize green to 1 ie green =1 then the remaining 5 color will have 2 to 6
  eg-
  
  

  #include
  #include
  main()
  {
  enum color{
  red=1,green=1,yellow,white,black,blue,orange
  };
  enum color mycolor = white;
  printf("%d",mycolor);
  printf("%d%d",red,orange);  //We can also print by their name .
  getch();
  return;
  }