It would be nice to know what you think isn't working, or where you are stuck. Modulo that, from looking at (not trying to build/execute) your code....
Your approach makes a mountain from a mole hill I think; unless you aren't allowed to use strtoll(). If there are no restrictions, then have a look at the strtoll() manual page, and if you need to add error checking to ensure that a non-hex character hasn't been entered, have a peek at the strspn() manual page too.
If there are restrictions, there still isn't the need for the use of the pow() function; simple (unsigned) character based math and shifting are all that are needed. Consider this example:
Code:
unsigned char *cval = "123";
int val = 0;
int i;
for( i = 0; i < strlen( cval ); i++ )
{
val <<= 4;
val += cval[i] - '0';
}
printf( "%x\n", val );
You'll have to handle a-f and A-F which aren't handled here, but this might point you in the direction of an easier way if strtoll() has to be avoided for the assignment.
Using floating point values for this will make things much more difficult; stick with 64 bit integer. I'd also think about bitwise AND and shift operations as a way to split your key.
Hi!
What is the way to get the binary representation of a IEEE 754 (like 0001110110001111010101100111001011100100101010111101) without using perl. Bash for example, would be fine.
I need to put that representation in a string for some operation and then to put that string back in a float.
... (3 Replies)
I came across a puzzle which I can not explain. The setup is SCO OpenServer 5.7 (32 bit OS) and native SCO compiler. double is 8 bytes long on this system. I am able to populate the double variable with two different sets of values that produces the same double value, please see below:
#include... (7 Replies)
Hello friends,
Is there any way to split file from n to n+6 into 1 file and (n+7) to (n+16) into other file etc.
f.e I have source pipe delimated file with 20 lines and i need to split 1-6 in file1 and 7-16 in file2 and 17-20 in file 3
I need to split into fixed number of file like 4 files... (2 Replies)
Hi, consider a file which has data such as
"random text",912345,"54","finish"
"random text",9991236745,"9954","finish"
I want to replace the numbers that don't have double quotes around them with ones that do; so the output should be
"random text","912345","54","finish"
"random... (4 Replies)
Dear All,
I have to split a tab delimited file in two files based on the presence of a positive or negative in column number 9 , for example
file:
A 1 5 erg + 6766 0.9889 0.9817 9.01882 erg inside upstream
B 1 8 erg2 + 6766 0.9889 0.9817 -9.22 erg2 inside... (3 Replies)
Hello *nix specialists,
Im working for a non profit organisation in Germany to transport DSL over WLAN to people in areas without no DSL. We are using Linksys WRT 54 router with DD-WRT firmware There are at the moment over 180 router running but we have to change some settings next time. So my... (7 Replies)
I have an assignment in which a character is the input of which some bits(from a position to certain position) are to be inverted (1's complement) and then the resultant character is to be returned....for example
unsigned char x = J from p = 3 to offset n = 5
01001010 inverted to... (1 Reply)
I have a file that is pipe delimited and in Column F they have number values, both positive and negative. I need to take the one file I am starting with and split it into two separate files based on negative and positive numbers. What is the command to do so? And then I need to also transfer... (4 Replies)
Discussion started by: cckaiser15
4 Replies
LEARN ABOUT SUSE
strtoq
STRTOL(3) Linux Programmer's Manual STRTOL(3)NAME
strtol, strtoll, strtoq - convert a string to a long integer
SYNOPSIS
#include <stdlib.h>
long int strtol(const char *nptr, char **endptr, int base);
long long int strtoll(const char *nptr, char **endptr, int base);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
strtoll(): XOPEN_SOURCE >= 600 || _BSD_SOURCE || _SVID_SOURCE || _ISOC99_SOURCE; or cc -std=c99
DESCRIPTION
The strtol() function converts the initial part of the string in nptr to a long integer value according to the given base, which must be
between 2 and 36 inclusive, or be the special value 0.
The string may begin with an arbitrary amount of white space (as determined by isspace(3)) followed by a single optional '+' or '-' sign.
If base is zero or 16, the string may then include a "0x" prefix, and the number will be read in base 16; otherwise, a zero base is taken
as 10 (decimal) unless the next character is '0', in which case it is taken as 8 (octal).
The remainder of the string is converted to a long int value in the obvious manner, stopping at the first character which is not a valid
digit in the given base. (In bases above 10, the letter 'A' in either upper or lower case represents 10, 'B' represents 11, and so forth,
with 'Z' representing 35.)
If endptr is not NULL, strtol() stores the address of the first invalid character in *endptr. If there were no digits at all, strtol()
stores the original value of nptr in *endptr (and returns 0). In particular, if *nptr is not '