Enumeration Data Type

An enumerated data type is also an user defined data type. The enum keyword is given before the enumerated data type. A list can tell the compiler which values a given variable can take. Consider the following example:

enum temp{Veryhot, Hot, Medium, Cold};

temp is of enum type and has four members Veryhot, Hot, Medium and Cold. The value 0 is assigned to Veryhot, value 1 is assigned to Hot, 2 is assigned to Medium and so on. The enum specifier allows the user to specify the possible value of the type. If an initial value of -1 is assigned to the first element of the enum type, the subsequent elements are assigned the values 0, 1, 2, etc.

A variable of enum type can be declared as follows:

temp t1;

This indicates that t1 is a variable of type temp which is of enum type.

Example

Write C++ program illustrates the use of enumerated data type.

#include <iostream.h> 
 #include<conio.h> 
 enum qlty{excellent, good, average}; 
 struct product 
  { 
     char prodno[10]; 
     char prodname[20]; 
     qlty q1; 
  } prod; 
 void main() 
 { 
    clrscr(); 
    cout<<"Enter Product Number :"; 
    cin>>prod.prodno; 
    cout<<"Enter Product Name :"; 
    cin>>prod.prodname; 
    cout<<"Enter quality code for the product."; 
    cout<<"\n0 for excellent, 1 for good, 2 for average \n"; 
    cin>>int(prod.q1); 
    cout<<"\n\nProduct Number :"<<prod.prodno; 
    cout<<"\nProduct Name :"<<prod.prodname; 
    if(prod.q1==0) 
       cout<<"\nQuality Excellent"; 
    else if(prod.q1==1) 
       cout<<"\nQuality Good "; 
    else 
       cout<<"\nQuality Average "; 
       getch(); 
 }