nested printf

[soorajk007]

Hi friends,

Can u plz tell me why
printf("%d",printf(" Hello World "));
prints Hello World13.
Please explain the concept in detail.

Thanks
Sooraj

 

[Bill Pursell]

Hi friends,

Can u plz tell me why
printf("%d",printf(" Hello World "));
prints Hello World13.
Please explain the concept in detail.

From the man page for printf:

Upon successful return, these functions return the number of
characters printed ...

The inner printf printf " Hello World " and returns the number of
characters printed, namely 13. The outer printf then prints "13".

 

[void * clvrmnky()]

Can u plz tell me why
printf("%d",printf(" Hello World "));
prints Hello World13.
Please explain the concept in detail.

Didn't someone asked this very question in this newsgroup recently? I
recall because I had never seen this construct before, though the answer
did not surprise me in the least.

 

[SM Ryan]

(e-mail address removed) wrote:
# Hi friends,
#
# Can u plz tell me why
# printf("%d",printf(" Hello World "));
# prints Hello World13.
# Please explain the concept in detail.

Lisp serialisation.