C: how to break apart a multi digit number into separate variables?
int value = 123; while (value > 0) { int digit = value % 10; // do something with digit value /= 10; }
digit
regular expression to match exactly 5 digits
I am reading a text file and want to use regex below to pull out numbers with exactly 5 digit, ignoring alphabets. Try this… var str=”f 34 545 323 12345 54321 123456″, matches = str.match(/\b\d{5}\b/g); console.log(matches); // [“12345”, “54321”] jsFiddle. The word boundary \b is your friend here. Update My regex will get a number … Read more
How do get numbers to display as two digits in C?
You need to use %02d if you want leading zeroes padded to two spaces: printf (“%02d : %02d : %02d\n”, hour, minute, second); See for example the following complete program: #include <stdio.h> int main (void) { int hh = 3, mm = 1, ss = 4, dd = 159; printf (“Time is %02d:%02d:%02d.%06d\n”, hh, mm, … Read more
Why was the space character not chosen for C++14 digit separators?
There is a previous paper, n3499, which tell us that although Bjarne himself suggested spaces as separators: While this approach is consistent with one common typeographic style, it suffers from some compatibility problems. It does not match the syntax for a pp-number, and would minimally require extending that syntax. More importantly, there would be some … Read more
JavaScript expression to generate a 5-digit number in every case
What about: Math.floor(Math.random()*90000) + 10000;
Finding the length of an integer in C
C: You could take the base-10 log of the absolute value of the number, round it down, and add one. This works for positive and negative numbers that aren’t 0, and avoids having to use any string conversion functions. The log10, abs, and floor functions are provided by math.h. For example: int nDigits = floor(log10(abs(the_integer))) … Read more