Question { 10291 }

which one is better structure or union?(other than the
space occupied )

Answer

strucure is always better than union.
there are to reasons
1.
union occupies incorrect memory.
e.g.
if the lower memory space data is preceeded by higher one.
Then memory should be alloted is addition of these two, but
the memory will be alloted will be any one out of higher
and lower there is no way to assure what memory would be
occupied.

2.
the data given in union is not necessarily be(maybe/may not
be) extreacted properly.
but in structure correct amount of memory space will be
occupied and extracting element is easy.

Question { 4564 }

union
{
char ch[10];
short s;
}test;
test.s = 0xabcd;


main()
{
printf("%d",ch[10]);
}

Answer

The code written is incorrect......
union
{
char ch[10];
short s;
}test;
test.s = 0xabcd;


main()
{
printf("%d",ch[10]);/*%D CAN'T BE USED FOR CHARACTER
EXTRACTION*/
}

Question { 3389 }

enum
{
SUNDAY,
MONDAY,
TUESDAY,
}day;
main()
{
day =20;

printf("%d",);
getch();
}
what will be the output of the above program

Answer

If u observe the program carefully,you will come to know
ther is syntax error.
enum
{
SUNDAY,
MONDAY,
TUESDAY,
}day;
main()
{
day =20;

printf("%d",);//printf("%d",) error maker
getch();
}

If u put it
printf("%d",day);
then it will print 20 because 20 is the latest value
assigned for day.