there is no as such logic behind it..its just the format specifier...
u must be knowing printf returns the number of values it has printed(u can
check that)
now, in printf if u write like *printf("%7s","a"), *it will create 7
columns for the output and print a in the last column and the returned value
of this printf will be 7..(u can check it)
now if u write *printf("%*s",7,"a")* then u r giving additional information
of format specifier i.e 7..returned value of this printf is also 7.
Hence the above logic..hope I am able to clarify it...:)
On Thu, Jun 23, 2011 at 8:06 PM, Anika Jain <[email protected]> wrote:
> i mean how it working actually?
>
>
> On Thu, Jun 23, 2011 at 8:06 PM, Anika Jain <[email protected]>wrote:
>
>> hey ya its working :) but whats the logic behind it??
>>
>>
>> On Thu, Jun 23, 2011 at 7:52 PM, Piyush Sinha
>> <[email protected]>wrote:
>>
>>> sorry by mistake i added it in scanf situation..
>>> actually this type of specifier can be used with printf statement for
>>> finding the sum...
>>>
>>> look at the code below....
>>>
>>> main()
>>> {
>>> int a=9;
>>> int b=3;
>>> printf("%d\n",printf("%*s%*s",a,"",b,""));
>>> system("pause");
>>> }
>>>
>>> On 6/23/11, Anika Jain <[email protected]> wrote:
>>> > thanx .. can u explain me how this is used in finding sum of 2 vars
>>> without
>>> > using + ??
>>> >
>>> >
>>> > On Thu, Jun 23, 2011 at 7:20 PM, Piyush Sinha
>>> > <[email protected]>wrote:
>>> >
>>> >> An asterisk indicates that the data is to be retrieved from the use
>>> >> but ignored, i.e. it is not stored in the corresponding
>>> >> argument...hence the third value entered gets stored for b and for c
>>> >> the output comes to garbage value....
>>> >>
>>> >> One beautiful application of such type of implementation is in finding
>>> >> the sum of 2 variables without using + operator..:)
>>> >>
>>> >> On 6/23/11, Anika Jain <[email protected]> wrote:
>>> >> > int main()
>>> >> > {
>>> >> > int a,b, c;
>>> >> > scanf("%d%*d%d",&a,&b,&c);
>>> >> > printf("%d %d %d",a,b,c);
>>> >> > }
>>> >> >
>>> >> > output: 25 35 garbage
>>> >> >
>>> >> > how is it happening??
>>> >> >
>>> >> > --
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>>> >> >
>>> >> >
>>> >>
>>> >>
>>> >> --
>>> >> *Piyush Sinha*
>>> >> *IIIT, Allahabad*
>>> >> *+91-8792136657*
>>> >> *+91-7483122727*
>>> >> *https://www.facebook.com/profile.php?id=100000655377926 *
>>> >>
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>>>
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>>
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