Programming :: Getting Number Of Digits In Uint64_t?
Jul 7, 2011
I'm having a hard time trying to get the number of digits in a uint64_t variable. The reason I'm using this is I want to make sure I get x amount of digits inside of a variable before I use it, but since the higher the digits, the better the program is.I currently use the following code, and it works, but my loop will never exit because the length is always 0:
Code:
/**
* numbdigits()
* number: The number to evaluate [in]
*
* Returns the number of digits found in a number.
[code]....
getrand() returns a uint64_t as well (and works). The only way the while() loop ends without my intervention is if I do curd += numdigits(val) instead...but, that gives a false value as well.
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Oct 17, 2010
I am a dummy in C programming. I have a problem with copying the array of 64 elements of unsigned char to array of 8 element of uint64_t. For example:
unsigned char p[64]
uint64_t Data[8];
memcpy (&Data, &p, 64);
I am not sure if it is right. Please help me. Thanks a lot.Moreover, do both p and Data have 64 bytes?
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Mar 27, 2011
how much big number can be managed by gmp library under plain GCC environment? (does GMP cover infinite length of integer?)
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Aug 29, 2010
I am trying to replacee all digits with a symbol (say, big U here) in a string by
[code]...
The result become 'UsUoUmUeUtUhUiUnUgU' instead of 'somethingUUU' as expected. Looks like my string contains some 'hidden digits' in between the letters. Does anyone have an idea about that?
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Apr 8, 2010
I am having a huge problem checking the data I input to make sure it is correct. What I am trying to achieve is when I input a value, it will check if the input is all digits and if it is not, check to see if it contains certain alphabets. Thus for example, if I were to input in data such as "11A" , the program will then inform me "There is an important alphabet in the program." This would be my expected output. Here is the program I have wrote...
Code:
int test(string r ){ const int arraySize = 10;
char array2[arraySize2] ={'A','B','E','F','G','H','J','K','N','O','P','Q','R','S','T','U','W','Y','Z'};
for(int cntr = 0; cntr <r.length(); cntr++)
if(!isdigit(r[cntr])){ for(int new1 =0; new1<arraySize2;new1++)
for(int cntr1 = 0; cntr1 <r.length(); cntr1++)
if(array2[new1] == r[cntr1]){ return 2; //will return2 when it finds the same
// char in the array and the string r. } else{ return 3;
//will return 3 when there is a char
//in the string which isnt in the array
} } else { return 1; // will return 1 when string is all digit.
} int main() { string r = "11D"; test(r);
if(test(r) == 1) { cout << "ALL ARE DIGITS" << endl;
} if (test(r)== 2) {
cout << "There is an important alphabet in the program." << endl;
} if (test(r)== 3) { // testRoman(r);
cout << "There is an Alphabet in the String which is not in the Array" << endl;
} }
So, the problem I am facing is when I input in data such as 11 or A , the prog will come out the right input. But if I were to put in data such as "11A" , the output coming out will be "ALL ARE DIGITS". The problem which causes this seems to be in the return statement , as once as it finds the first char which is a digit, it will then return 1 and not continue checking the rest of the string. Is there a way I can stop or continue a loop if it has met the condition I stated? What I can do or any other way available for me to check my input?
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Nov 29, 2009
My problem is this:I have a number of directories, all containing files of different name lenghts, including letters, numbers and possibly spaces. I want to recursively rename all of these files, so that only the _last_ 5 digits (not counting the extension) remain. In other words: I want to cut off all but the last 5 digits and not touch the extension.
I've tried to read up on tr, rename (perl version), sed, cut etc. and browsed through some threads here, but so far couldn't quite figure out how to do it.
If someone could point me to the right (standard) CLI tools and syntax.
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Jun 28, 2010
I am trying to write a program that gets file permission. I understand linux has ls -l can view file permission, but it has too many information that I have to process those strings in my program. Is there an easier command just return me the permission digits like:
$ getperm /home/file
0440
$
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Jun 20, 2011
I have many files with name in order of number. e.g)
u0101.asc
u0102.asc
u0103.asc
[code]...
I am trying to read file using for loop.
for ((date=01; date<=31; date++))
do
echo ${date}
done
but '01' is read(print) as '1' How can I make it read from '1' to '01'?
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Jan 1, 2010
I want to count the digits in between the text in a file.
e.g.
write down the form
2.3 3.3 3.0 505.0 0.777E-07
22.3 3.3 5.0 503.0 1.777E-04
Then read this.
How can i do the counting of these digits present in between a text in a file?
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Feb 1, 2010
I have some code that opens a directory and reads in the names of files which are e.g. 0001, 0002, 0003 up to 9999I need to get all these numbers and then generate a new number that is not one of these numbers already.here is my code to check the files in the directory
DIR *d;
struct dirent *dir;
int i = 0;
[code]....
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Jul 7, 2011
But what is the easiest way to figure out the Unicode number of a character when you already have the character?
For instance, I pasted this character here from a PDF:
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Apr 13, 2011
Anybody knows How can I get the number of cores of a machine?I know that I can use POPEN and get the stream of this:
Code:
grep -i 'processor' /proc/cpuinfo | wc -l
But, I think that a simple method to do this.
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Mar 4, 2011
i want to generate random number in c programming from -1 to 1
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Aug 6, 2010
1) I need to search a field value to check for exact 0. If the number is 0, it should throw error.
The line to be searched looks like as below. "Output Rows [1], Affected Rows [1], Applied Rows [1], Rejected Rows [0]"
Here I have to search whether the affected rows is 0. But the code below picks up other values also (lie 10, 20.. etc). How do we write to get an exact match for 0? Code: affected=`echo ${line} | cut -f6 -d" " `
affectedcount='echo ${affected} |grep 0 ` 2) Also, I need to check whether the rejected rows > 0
Code: rejected=`echo ${line} | cut -f12 -d" " `
rejectedcount='echo {rejected} |grep [1-9]`
3)Can we combine these two statements in a better way to get the desired results?
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Apr 30, 2011
I've created (as a homework) to create as many folders as told but I still need to check if the variable is a number or not :
Code: #!/bin/sh
echo "Veuillez saisir un nombre"; read nmbr
nmbrf=$nmbr
while [ $nmbrf -gt 0 ]
do mkdir -p "foo$nmbrf"
nmbrf=`expr $nmbrf - 1`
echo "$nmbrf"
how do I check that nmbr is a number or something else?
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Jan 10, 2011
I try to get the absolute value of a floating number but i could not until now. I am using bash script btw.lets say A is a floating number:A=-0.125
Code:
absA=$(echo '$A' | nawk '{print ($1>=0)? $1:0-$1}')
the above code gives absA=0, whereas
[code]....
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Jan 27, 2011
I have a char*[] array:
Code:
char* myarray[] = {"Hello", "there!", "LQ"};
and I wish to use/ write a function to find the number of elements in myarray (in this case, its 3).
*equivalent of .NET's array.size() that returns number of elements in array
How do I achieve it?
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Apr 23, 2009
I have a text file that contains the following string of numbers and letters:
Code:
Mean track length: 3.45 +/- 1.23 mm
or
Code:
Mean track length: 22.45 +/- 12.23 mm
In the first example, I would like to grab only 3.45 and write it into a new file. Then I would like to grab only 1.23 and write it into another file.
I have 80,000 files to do and those numbers can be different every time.
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May 9, 2010
I want to be able to run a piece of AWK code on a record specified by number, not by a regex.
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Jun 16, 2010
User submits a ms word file, and the php can recognize the number of words? Is it only possible for ms win server?
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May 10, 2011
How can I know what number descriptor is used by my usb device indicate via libusb_device_handle structure ? I can't find declaration of libusb_device_handle structure. I need this information to use poll() function where I need decripttion number of device.
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May 10, 2011
How can I know what number descriptor is used by my usb device indicate via libusb_device_handle structure ? I can't find declaration of libusb_device_handle structure. I need this information to use poll() function where I need decripttion number of device.
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May 15, 2011
How can i get bc to subtract negative numbers?
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Feb 3, 2010
In C, how can I declare multiple variables at once where the number that needs to be declared is unknown to the programmer.For example, a program that needs to declare some number of integers, but the user will tell the program how many integers to declare. Such as:
x1
x2
x3
x4
x5
.
.
.
Where the programmer doesn't know how many need to be declare you setup theinitialization?
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Nov 29, 2010
Goal:assign integers into array form string.
From string
"123,456,789,0123,4567,8901" (comma separated 6 integer numbers)
To array
[code]....
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Jun 8, 2011
IS there any command to see number of threads are running in a process .I have check ps -eLf but it wont show display for all the threads
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Feb 22, 2010
Code:
FILE_SIZE=`find /var/logs/ -type f -mtime +5 | wc -c`
im trying to convert FILE_SIZE into megabytes
[code]....
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Dec 15, 2008
I need to write a script which will get a number from STDIN and then with that number echo a set number of questions (its for a firewall config). Heres what I want the user to receive.
How many ports do you want open? 3
1. specify port: 80
2. specify port: 21
3. specify port: 23
In the background this will echo a command out to a text file which will read as follows:
open port 80
open port 21
open port 23
I've done this before but I've completely forgotten how
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Dec 10, 2008
I have something like this:
$arr_hash{'produce'}{'veggies'}[0] = Broccoli
$arr_hash{'produce'}{'veggies'}[1] = Cauliflower
$arr_hash{'produce'}{'veggies'}[2] = Carrots
[code]...
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Jun 11, 2010
E.g. 98 is represented as 1100010 (number of valid bits is 7)
What is the formula to calculate the number of valid bits in a byte ?
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