Answer Posted / sunil

When the parameter is a datatype.
For Eg: sizeof(int), sizeof(double)
#define GetSize(x) (char*)((x*)10 + 1) - (char*)10


When the parameter is a variable.
For Eg: int a;
float b;
sizeof(a), sizeof(b)
#define GetSize(x) (char*)(&x + 1) - (char*)&x

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