putchar(getchar())

Question

consider the statements

putchar (getchar());

putchar (getchar());

if

a

b    is the input , the output will be

  a)ab                        b)a  b

 c)an error message  d)this can not be the input

Answer 1

Answer will be option D. As, '\t' and '\n' is considered as input in getchar(). So if we try to give the input as
a
b
the second getchar() will take '\n' as input.
Even if we try to give the input as 'a b' the output will be only 'a', cause the 2nd getchar() will take '\t' as input.
But if we give 'ab' as input, then the 2nd getchar() will consider 'b' as it's input, so the o/p will be 'ab'.
If you remove the 2nd putchar() line and try with 'ab', you will get to understand the 1st one will only put 'a' as o/p in the stdout.

Comments

can you share the screenshot of the running program?

Answer 2

This wont give any error, output depends on the way input is provided. If input is 'ab' then output will be 'ab', if input is 'a b' output will be 'a ' assuming that you have not made any mistake in the format of question, the input seems to be 'a\nb', so output will be 'a\n'.

I think D will be the right.choice, as there is no option for 'None of these'.

Comments

ohh..is it because getchar() takes \t as the input for the first case and \n as input for second case

and thereby printing only 'a' ??