Answer Posted / azad sable,chiplun.

In first case i.e. '%d' the '%' indicates that the
conversion specification follows. And 'd' known as data
type charactor indicates that the no. to be read is in
intiger mode.
* is an input field which specifie field width.
example
scanf("%d%*d%d",&a,&b);
will assign the data 123 456 789 as follows.123 to a 456
skipp because of * 789 to b.

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