In what manner did it not "pass compilation"? I left my crystal ball at home today.
You should also realize that "==" isn't really meant for floating point numbers. It will only return true when the values are exactly, exactly the same to a ludicrous degree of precision you'll likely never find in real life. For instance, this code fails on my system:
The greater or less-than operators are safe though, so if(abs(b-c) < 0.000001) will be better behaved than if(b==c). Pick a small enough value of 0.000...1 to match the level of precision you want.
Last edited by Corona688; 02-16-2011 at 11:40 AM..
Hi,
I wrote this script
awk -F"\t" '{if ((($1 == 586) || ($1 == 68030)) && (($2/1024) < 512)) print $0"\t"(512-($2/1024))"\t"(512-($2/1024))/256}' pcs.txt
But I want from the calculation in red to get rid of the decimal part. Like instead of 1.75 to keep only 1.Please somebody tell me what... (4 Replies)
Hi, I got an easy problem for you but really difficult for me 'cause I am pretty new to this field
I got header file <math.h> included in my .c file , then I write the code as below:
k = sqrt(i); /* both variables k and i are int */
then I cc temp.c
it says like this
undefined... (4 Replies)
Hey all,
How do I link the math library in a gnu make makefile? I have tried using -lm with the CFLAGS varibale - flags like -Wall and -ggdb work, but -lm does not. I am running gcc - 4.1.2 on a linux machine. (2 Replies)
I have 2 variables
a=2
b=1
i want to add a and b
how do i do this in unix using just the echo command and by assigning it to a different variable like c? (13 Replies)
I am trying to do some math, so that I can compare the average of six numbers to a variable.
Here is what it looks like (note that when I divide really big numbers, it isn't a real number):
$ tail -n 6 named.stats | awk -F\, '{print$1}'
1141804
1140566
1139429
1134210
1084682
895045... (3 Replies)
I am struggling with scripting this challenge a friend and I have.
You have file1 and its contents is a single number
you have file 2 and its contents are a different number
you want to add file1 to file2 and have the output be put into file3 (3 Replies)
i have file (my_file.txt) that looks like this:
000000000000010000
000000000000010000
000000000000005000
000000000000005000
000000000000005000
000000000000005000
000000000000005000
000000000000005000
000000000000005000
000000000000005000
all said and one, it should look... (11 Replies)
Hi,
Apologies if I posted it in a wrong section as it is related to gcc on cygwin. Please move it to appropriate section.
I'm trying to compile and build libsigc++-2.10.2 on cygwin with gcc 8.3.0.
when I run ./configure, I get this:
I couldn't fully understand what does... (13 Replies)
Discussion started by: prvnrk
13 Replies
LEARN ABOUT SUNOS
islessgreater
islessgreater(3M) Mathematical Library Functions islessgreater(3M)NAME
islessgreater - test if x is less than or greater than y
SYNOPSIS
#include <math.h>
int islessgreater(real-floating x, real-floating y);
DESCRIPTION
The islessgreater() macro determines whether its first argument is less than or greater than its second argument. The islessgreater(x, y)
macro is similar to (x) < (y) || (x) > (y); however, islessgreater(x, y) does not raise the invalid floating-point exception when x and y
are unordered (nor does it evaluate x and y twice).
RETURN VALUES
Upon successful completion, the islessgreater() macro returns the value of (x) < (y) || (x) > (y).
If x or y is NaN, 0 is returned.
ERRORS
No errors are defined.
USAGE
The relational and equality operators support the usual mathematical relationships between numeric values. For any ordered pair of numeric
values, exactly one of the relationships (less, greater, and equal) is true. Relational operators can raise the invalid floating-point
exception when argument values are NaNs. For a NaN and a numeric value, or for two NaNs, just the unordered relationship is true. This
macro is a quiet (non-floating-point exception raising) version of a relational operator. It facilitates writing efficient code that
accounts for quiet NaNs without suffering the invalid floating-point exception. In the SYNOPSIS section, real-floating indicates that the
argument is an expression of real-floating type.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO isgreater(3M), isgreaterequal(3M), isless(3M), islessequal(3M), isunordered(3M), math.h(3HEAD), attributes(5), standards(5)SunOS 5.10 1 Nov 2003 islessgreater(3M)