Question about unions (C language)

[impakt]

Hello all,
I have a question about unions. Suppose we have the following piece of code:

typedef struct {
                      ...
                     }type_struct1;

typedef struct {
                      ...
                     }type_struct2;

typedef union{
                    type_struct1* var1;
                    type_struct2* var2;
                    }type_union;

Hoe much memory is allocated for the union in this case?

 

[btbass]

In this case it is the size of one pointer which can point to two different types.

 

[Mansour_M]

Hi Dear Friend!

Unions always occupies the space needed for the largest variable the have.