@vishal: Floats and doubles are stored in different formats, so looking at the first 8 hex digits of the two numbers isn't really helpful.
The expression f < 0.8 is evaluated as (double)f < 0.8, so it would be more useful to print all 16 hex digits of (double)0.8f and 0.8. Then it would be easy to see that 0.08f < 0.08. Dave On May 29, 11:35 pm, Vishal Thanki <vishaltha...@gmail.com> wrote: > you may want to check how the floats and doubles are stored into > memory using ieee notation. > > i tried to print 0.08 and 0.08f in hex format and got the following result. > > vishal@ubuntu:~/progs/c\ 10:03:56 AM >$ cat fl.c > #include <stdio.h> > int main() > { > float f=0.08; > if (f < 0.08f) > printf("hi\n"); > else > printf("hello\n"); > > printf ("%x %x\n",0.08, 0.08f); > return 0;} > > vishal@ubuntu:~/progs/c\ 10:04:06 AM >$ gcc fl.c > fl.c: In function ‘main’: > fl.c:10: warning: format ‘%x’ expects type ‘unsigned int’, but > argument 2 has type ‘double’ > fl.c:10: warning: format ‘%x’ expects type ‘unsigned int’, but > argument 3 has type ‘double’ > vishal@ubuntu:~/progs/c\ 10:04:11 AM >$ ./a.out > hello > 47ae147b 3fb47ae1 > vishal@ubuntu:~/progs/c\ 10:04:14 AM >$ > > ps: please ignore the warning in the code. > > On Sun, May 29, 2011 at 10:23 PM, sravanreddy001 > > > > <sravanreddy...@gmail.com> wrote: > > and, I read it long time back that.. the value of 0.8 alone will be stored > > as 0.799999999995 (not sure on the number of 9's but.. the last digit in the > > precision will be a 5) > > that could be a reason. > > may be what "vishal" said is correct. > > > -- > > You received this message because you are subscribed to the Google Groups > > "Algorithm Geeks" group. > > To post to this group, send email to algogeeks@googlegroups.com. > > To unsubscribe from this group, send email to > > algogeeks+unsubscr...@googlegroups.com. > > For more options, visit this group at > >http://groups.google.com/group/algogeeks?hl=en.- Hide quoted text - > > - Show quoted text - -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.