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Home » Tip Bank » C++
Language: C++
Expertise: All
Jan 20, 1999

Initializing a Union

It is possible to initialize a union. Yet, unlike struct initialization, the initialization list of a union must contain a single initializer that refers to the first member in the union:
 
union Key { 
  int num_key;
  void *ptr_key;
  char  name_key[10];
};
Key a_key = {5}; //first member of Key is of type int; all other bytes are initialized to binary zeroes
Danny Kalev
 
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