Hi , Well i am not too sure about it but i think it can be done easily using unions...... and its there in let us c by yashwant kanitkar....(unions chapter).... byee
----- Original Message ----- From: "Paul Herring" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, December 31, 2004 2:57 PM Subject: RE: (PT) problem in exchange of two nibbles in a byte > > > From: suresh babu [mailto:[EMAIL PROTECTED] > > >hi, i am suresh. in an interview i was asked to reverse two > >nibbles in a byte of data. > > > >the question is as follows. suppose a number is assigned to a > >character like > > > >char c=0x82 then, a function should be described such that it > >will return number as 0x28 > > > >my way of approach is as follows > [snip] > >but in the above program, temp1 is taking one byte of memory n > >value stored in it is 02, but temp2 is taking 2 bytes of > >memory and storing value as FFF8 before shifting. > > > >i had tried this program using Turboc3 compiler > > > >pls suggest modification in my program r any other approach to > >solve this problem > > Your compiler is using 'signed char' - you either need to find an option > to make it use 'unsigned char' or explicitly define it: > > $ type c.c > #include <stdio.h> > > unsigned char exch_nibbles(unsigned char c){ > unsigned char temp1, temp2; > temp1=c & 0x0F; //to obtain last four bits > temp2=c & 0xF0; //to obtain first four bits > > temp1=temp1 << 4; //shifting the last four bits to left > temp2=temp2 >> 4; //shifting the first four bits to right > > printf("\nThe temp1 value after shifting is %x",temp1); > printf("\nThe temp2 value after shifting is %x",temp2); > > return(temp2|temp1); //adding the bits > } > > int main(void){ > char c=0x82; > printf("\nThe exchanged value is %x",exch_nibbles(c)); > return 0; > } > > $ c > > The temp1 value after shifting is 20 > The temp2 value after shifting is 8 > The exchanged value is 28 > $ > > -- > PJH > > If Windows is the solution, can we please have the problem back? > unknown > > > > > > Alderley plc, Arnolds Field Estate, The Downs, Wickwar, Gloucestershire, GL12 8JD, UK > Tel: +44(0)1454 294556 Fax: +44 (0)1454 299272 > > Website : www.alderley.com Sales : [EMAIL PROTECTED] Service : [EMAIL PROTECTED] > > This email and its contents are confidential and are solely for the use of the intended recipient. If you are not the original recipient you have received it in error and any use, dissemination, forwarding, printing or copying of this email is strictly prohibited. Should you receive this email in error please immediately notify [EMAIL PROTECTED] > > This email has been scanned for viruses, however you should always scan emails with your own systems prior to opening. > > > > > > > > > > > To unsubscribe : [EMAIL PROTECTED] > > > Yahoo! Groups Links > > > > > > > To unsubscribe : [EMAIL PROTECTED] Yahoo! Groups Links <*> To reply to this message, go to: http://groups.yahoo.com/group/Programmers-Town/post?act=reply&messageNum=4986 Please do not reply to this message via email. More information here: http://help.yahoo.com/help/us/groups/messages/messages-23.html <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Programmers-Town/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
