digit

How do get numbers to display as two digits in C?

由 我的梦境 提交于 2019-11-28 08:01:28
For C programming. How do i get numbers to be displayed as 00, 01, 02, 03, instead of 0, 1, 2, 3. I just need 0 before the number until 10. i know when your doing decimals you can do "%.2f" etc. but what about in reverse for integers? here is what I am using...** printf("Please enter the hours: "); scanf ("%d",&hour); printf("Please enter the minutes: "); scanf ("%d",&minute); printf("Please enter the seconds: "); scanf ("%d",&second); printf("%d : %d : %d\n", hour, minute, second); } I need the numbers to display as 00 : 00 : 00 ?? You need to use %02d if you want leading zeroes padded to two

Which is best data type for phone number in MySQL and what should Java type mapping for it be?

由 我是研究僧i 提交于 2019-11-28 03:48:26
I am using MySQL with Spring JDBC template for my web application. I need to store phone number with only digits (10). I am little bit confused about data type using data type. What is preferable data type for it in MySQL? What should be Java data type in Bean (POJO) classes for that? How can I validate that datatype with javax validations/constrains for length and also only digit allowed? Strings & VARCHAR. Do not try storing phone numbers as actual numbers. it will ruin the formatting, remove preceding 0 s and other undesirable things. You may, if you choose to, restrict user inputs to just

What is the fastest algorithm for division of crazy large integers?

由 我们两清 提交于 2019-11-27 21:43:50
问题 I need to divide numbers represented as digits in byte arrays with non standard amount of bytes. It maybe 5 bytes or 1 GB or more. Division should be done with numbers represented as byte arrays, without any conversions to numbers. 回答1: Divide-and-conquer division winds up being a whole lot faster than the schoolbook method for really big integers. GMP is a state-of-the-art big-number library. For just about everything, it has several implementations of different algorithms that are each

JavaScript expression to generate a 5-digit number in every case

由 拟墨画扇 提交于 2019-11-27 20:26:47
问题 for my selenium tests I need an value provider to get a 5-digit number in every case. The problem with javascript is that the api of Math.random only supports the generation of an 0. starting float. So it has to be between 10000 and 99999 . So it would be easy if it would only generates 0.10000 and higher, but it also generates 0.01000 . So this approach doesn't succeed: Math.floor(Math.random()*100000+1) Is it possible to generate a 5-digit number in every case (in an expression!) ? 回答1:

regular expression to match exactly 5 digits

由 |▌冷眼眸甩不掉的悲伤 提交于 2019-11-27 20:25:58
testing= testing.match(/(\d{5})/g); I'm reading a full html into variable. From the variable, want to grab out all numbers with the pattern of exactly 5 digits. No need to care of whether before/after this digit having other type of words. Just want to make sure whatever that is 5 digit numbers been grabbed out. However, when I apply it, it not only pull out number with exactly 5 digit, number with more than 5 digits also retrieved... I had tried putting ^ in front and $ behind, but it making result come out as null. I am reading a text file and want to use regex below to pull out numbers with

C: how to break apart a multi digit number into separate variables?

由 試著忘記壹切 提交于 2019-11-27 17:14:46
问题 Say I have a multi-digit integer in C. I want to break it up into single-digit integers. 123 would turn into 1 , 2 , and 3 . How can I do this, especially if I don't know how many digits the integer has? 回答1: int value = 123; while (value > 0) { int digit = value % 10; // do something with digit value /= 10; } 回答2: First, count the digits: unsigned int count(unsigned int i) { unsigned int ret=1; while (i/=10) ret++; return ret; } Then, you can store them in an array: unsigned int num=123; /

Why was the space character not chosen for C++14 digit separators?

由 泪湿孤枕 提交于 2019-11-27 11:38:19
问题 As of C++14, thanks to n3781 (which in itself does not answer this question) we may write code like the following: const int x = 1'234; // one thousand two hundred and thirty four The aim is to improve on code like this: const int y = 100000000; and make it more readable. The underscore ( _ ) character was already taken in C++11 by user-defined literals, and the comma ( , ) has localisation problems — many European countries bafflingly † use this as the decimal separator — and conflicts with

How do get numbers to display as two digits in C?

由 六月ゝ 毕业季﹏ 提交于 2019-11-27 02:07:53
问题 For C programming. How do i get numbers to be displayed as 00, 01, 02, 03, instead of 0, 1, 2, 3. I just need 0 before the number until 10. i know when your doing decimals you can do "%.2f" etc. but what about in reverse for integers? here is what I am using...** printf("Please enter the hours: "); scanf ("%d",&hour); printf("Please enter the minutes: "); scanf ("%d",&minute); printf("Please enter the seconds: "); scanf ("%d",&second); printf("%d : %d : %d\n", hour, minute, second); } I need

Finding the length of an integer in C

由 …衆ロ難τιáo~ 提交于 2019-11-26 23:44:24
I would like to know how I can find the length of an integer in C. For instance: 1 => 1 25 => 2 12512 => 5 0 => 1 and so on. How can I do this in C? Jordan Lewis C: Why not just 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))) + 1; You should wrap this in a clause ensuring that the_integer != 0 , since log10(0) returns

Finding the length of an integer in C

由 丶灬走出姿态 提交于 2019-11-26 12:35:04
问题 I would like to know how I can find the length of an integer in C. For instance: 1 => 1 25 => 2 12512 => 5 0 => 1 and so on. How can I do this in C? 回答1: C: Why not just 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))) +
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