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how many mem does union cost?

Freddy Zhang

struct structSeperate
{
unsigned char uaHigh;
unsigned char uaLow;
};
union OneIntorTwoBytes
{
unsigned int un;
struct structSeperate ua;
};

void AFunction()
{
OneIntorTwoBytes unionMy;
...
...unionMy...//
...
}

In the above example, Could you please explain how many bytes of free mem will be allocated for AFunction()? How many bytes of free mem will be allocated for the whole module?

0