numbers

问题 What is the fastest and simplest way to generate fixed length random numbers in Go? Say to generate 8-digits long numbers, the problem with rand.Intn(100000000) is that the result might be far less than 8-digits, and padding it with leading zeros doesn't look like a good answer to me. I.e., I care about the the quality of the randomness more in the sense of its length. So I'm thinking, for this specific problem, would the following be the fastest and simplest way to do it? 99999999 - rand

问题 How do I convert a string that's a formatted number, back to a number? Decimal percent = 55.76; String strPercent = String.Format("{0:0.0}%", percent); Decimal dollars = 33.5; String strDollars = String.Format("{0:C}", dollars); Say later, I want to get the percent and dollar value back, as numbers. Is there any built-in way to do this using C# and asp.net? I know how I use regex and a String function, but I read about a Decimal.Parse() function from http://msdn.microsoft.com/en-us/library

问题 I have a table serviceClusters with a column identity(1590 values). Then I have another table serviceClustersNew with the columns ID, text and comment. In this table, I have some values for text and comment, the ID is always 1. Here an example for the table: [1, dummy1, hello1; 1, dummy2, hello2; 1, dummy3, hello3; etc.] WhaI want now for the values in the column ID is the continuing index of the table serviceClusters plus the current Row number: In our case, this would be 1591, 1592 and 1593

问题 how do i store a huge number in a variable (i) and wont need to change much of the program ? Is there a available datatype to store factorial of 100 for example ? #include<stdio.h> #include<conio.h> void main() { long long int i = 1; long long int sum = 0; long long int j = 0; long long int digit = 0; for(j = 500; j >= 1; j--) { i = i * j; } printf("%lld", i); while(i > 0) { digit = i%10; i = i/10; sum = sum + digit; } printf("\n%lld", sum); getch(); } 回答1: There is no built-in language

问题 I have a program where I deal with a lot of very small numbers (towards the lower end of the Double limits). During the execution of my application, some of these numbers progressively get smaller meaning their "estimation" is less accurate. My solution at the moment is scaling them up before I do any calculations and then scaling them back down again? ...but it's got me thinking, am I actually gaining any more "accuracy" by doing this? Thoughts? 回答1: Are your numbers really in the region

问题 In my question, we are given a number and list of numbers and we are supposed to get the first number from the given list of numbers by using the operations + or - For Example: -1 is the target number 1 2 3 5 are numbers given to get -1 solution should be -1+2+3-5 = -1 or -1-2-3+5 = -1 Limits for target number is from -180 to +180 and the limit for list of numbers is from 2 to 20 To find the solution what kind of algorithm should be used? If I want to use generate all the possibilities will

问题 I want the number being displayed in my EditText upto 1 decimal place with no leading zeroes e.g. 25.0 not like 025.0 how can i do this? this is in android 回答1: You can use DecimalFormat DecimalFormat format = new DecimalFormat("##.#"); String formattedText = format.format(025.0); editText.setText(formattedText); You will get result in EditText as 25.0 回答2: you can set it in xml file. Like <EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap

问题 I need Auto generated sequence number staring from 001 ONLY FOR 3 DIGITS in PHP / MYSQL ex: 001 next will be 002 and next will be 003 ... 009 .. 010 ..119..120..etc but number generated should be in sequence wise not like 001 then 120 or 008 etc , i need in sequence number. actually i have product tracking system . where i need mixer of my main product id + auto sequence number ( only 3 digit can change if wanted ) hence my final product id becomes : 111-001 , 111-002 , 111-003 , 111-004 ...

问题 Is there any published O(log b) algorithm to determine if a b-bit number is square of an integer? (I apologize if this question is beyond the scope of this site and would happily retrieve it if so) Update: I realize that my question as posed is unreasonable. So let me amend it by asking for any algorithm that is sub polynomial operations in b. Not necessarily O(log^k b) for a constant k, and has "reasonable" space complexity. Operations are defined in the usual sense: something that is

问题 I am a newbi to CUDA and I am struggling to generate random numbers in my kernels. I know there are different implementations, and, what is more, in the SDK 4.1 there is an example of the Niederreiter Quasirandom Sequence Generator. I don't know where to start... I am a bit sad and feeling like a dummy... Could anyone please please make a simple and silly example of using the Niederreiter Quasirandom Sequence Generator (SKD code example)? I would really apreciate it. For example, creating a