What is the size of the following struct on 64-bit machines?
struct S1{
short a;
};
struct S2{
int a;
double b;
short c;
};
struct S3{
char a;
short b;
char c;
int d;
};
struct S4{
char a;
short s1;
char *pchar;
double d;
long l;
float f;
};
union U{
char *p;
short s;
long l;
};
