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Home » Tip Bank » C++
Language: C++
Expertise: All
May 25, 1999

The Size of an Enum Type

In C, the size of an enumeration equals the sizeof(int). In C++, the underlying type for an enumeration is not necessarily an int--it can be smaller. Furthermore, if an enumerator's value is too large to be represented as an unsigned int, the implementation is allowed to use a larger unit. For example:
 
enum Distance
{
  Jove = 5000000000, //stored in a 64-bit integer
  Moon =300000  
};  
Danny Kalev
 
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