Question

In C programming language if I write
scanf("%d%d",&a,&b); it works fine but if I write:
scanf(" %d%d",&a&b); then it prompts for third input.?(notice there is a space before first % operator).
Moreover if I give more space then also it only prompts for only 1 extra input why is that.

Answer 1

Which compiler are you using?

Answer 2

What exactly are you trying to accomplish?

Answer 3

If you look at the format specification here: http://en.wikipedia.org/wiki/Scanf_format_string

you will:

(space): Space scans for whitespace characters.

i.e. a space in the format string will try to match whitespace characters in the input (e.g. space, tab, newline)

There is also a discussion on this here: http://bytes.com/topic/c/answers/559335-spaces-scanf-format-string

Answer 4

i see white space which the compiler probably reconizes in a URL encodeded string %d%d usually means white space or some other special character look it up on a ASCII refrence or whatever encoding method u using there. grain of salt I am only guessing.