I have to write a c program which takes a 3 digit number n and calculates the value of (2^n)+1 and then determines the number is prime or not.
I have tried to first calculate the value of 2^n and then adding one to it and then apply the logic of prime number.
but the ultimate problem is that if n is a 3 digit number for example 100
then 2^100 becomes a huge number for which my program is returning the same value of 2^100 and 2^100+1
for 2^50 and 2^50+1 it returns correct values with the diff of 1.
Please help me out here.
Hi,
Was wondering if you could give me an example of extracting a 10 digit number from 5 txt files using a regular expression (the number is always different ) and storing the numbers in variables
Thanks
C19 (9 Replies)
i am new to shell scripting. i want to keep on increamenting a 6 digit number. For eg. 000000 + 1 = 000001 But instead of 000001 i get only 1. How do i do this ? Pls help. (8 Replies)
how can i list all files in my home directory that have a 4 digit id number, the line number where the id is located and the id itself not printing the entire line? (5 Replies)
I want to write/print a number through a shell script up to its last significant digit (LSD) after the decimal point.
Say,
x=10.00056000000000000
I want to print x as x=10.00056.
Note that x can be any thing so I cannot know the position of the LSD always.
Thanks. (16 Replies)
Hello Team,
i have a file test1.txt, in which i have to grep only the 6 digit number from it,
Could you pls help in this.
$cat test1.txt
<description>R_XYZ_1.6 r370956</description>
$ grep "\{6\}" test1.txt
<description>R_XYZ_1.6 r370956</description>
i need output as 370956.
... (3 Replies)
Dear All,
Lets say I have a number with following format:
####.12e-##
now I want to compare place holder in position 1 and 2.
How can I do that?
Note: My number is stored in a variable say var.
example:
var=9999.12e-05
Thanks & Regards,
linuxUser_ (6 Replies)
I am trying to process only IonCode_odd #'s (always 4 digits starting with zero), but the below isn't working as expected. Is there a better way? Thank you :).
IonCode_0401_xxxx_xxxx_xxxx.bam
IonCode_0401_xxxx_xxxx_xxxx.bam.bai
IonCode_0401_xxxx_xxxx_xxxx.fastq... (2 Replies)
I all
I am tryng to find a way to sort a list of number in a file by the value of last two digit.
i have a list like this
313202320388
333202171199
373202164587
393202143736
323202132208
353201918107
343201887399
363201810249
333201805043
353201791691 (7 Replies)
Discussion started by: rattoeur
7 Replies
LEARN ABOUT ULTRIX
scanf
scanf(3int)scanf(3int)Name
scanf, fscanf, sscanf - convert formatted input
Syntax
#include <stdio.h>
int scanf( format [, pointer ] ... )
char *format;
int fscanf( stream, format [, pointer ] ... )
FILE *stream;
char *format;
int sscanf( s, format [, pointer ] ... )
char *s, *format;
Description
The international functions and are similar to the standard I/O functions. The difference is that the international functions allow you to
use the %digit$ conversion character in place of the I% character you use in the standard I/O functions. The digit is a decimal digit n
from 1 to 9. The international functions apply conversions to the n th argument in the argument list, rather than to the next unused argu-
ment.
You can use % conversion character in the international functions. However, you cannot mix the % conversion character with the %digit$
conversion character in a single call.
In all cases, uses the radix character and collating sequence that is defined by the last successful call to category or If the radix or
collating sequence is undefined, the function uses the C locale definitions.
International Environment
LC_COLLATE Contains the user requirements for language, territory, and codeset for the character collation format. affects the behav-
ior of regular expressions and the string collation functions in If is not defined in the current environment, provides the
necessary default.
LC_NUMERIC If this environment is set and valid, uses the international language database named in the definition to determine radix
character rules.
LANG If this environment variable is set and valid uses the international language database named in the definition to determine
collation and character classification rules. If or is defined, their definitions supersede the definition of LANG.
Examples
The following shows an example of using the function:
scanf("%2$s %1$d", integer, string)
If the input is `` january 9 '', the function assigns 9 to and ``january'' to
Return Values
The function returns the number of successfully matched and assigned input fields. This number can be zero if the function encounters
invalid input characters, as specified by the conversion specification, before it can assign input characters.
If the input ends before the first conflict or conversion, returns EOF. These functions return EOF on end of input and a short count for
missing or invalid data items.
Environment
In POSIX mode, the E, F, and X formats are treated the same as the e, f, and x formats, respectively; otherwise, the upper-case formats
expect double, double, and long arguments, respectively.
See Alsointro(3int), setlocale(3), strtod(3), strtol(3), printf(3int), getc(3s), printf(3s), scanf(3s)
Guide to Developing International Software
scanf(3int)