decimal

问题 Example C# code (in form load event): int a = 5; double b = 7.2; decimal c = 9.99m; string d = "test"; MessageBox.Show(a.ToString() + "\n" + b.ToString() + "\n" + c.ToString() + "\n" + d); Put a breakpoint on the messagebox line and run. Try to edit the values a, b, c and d in a locals window (or autos or watch). The integer, double and string values can be changed, but the decimal value (c) keeps changing back to the original (9.99m). Why is this? Possible bug? Or am I not getting something?

问题 I need the correct formula that will convert hours to minutes and vice versa. I have written a code, but it doesn't seem to work as expected. For eg: If I have hours=8.16, then minutes should be 490, but I'm getting the result as 489. import java.io.*; class DoubleToInt { public static void main(String[] args) throws IOException{ BufferedReader buff = new BufferedReader(new InputStreamReader(System.in)); System.out.println("Enter the double hours:"); String d = buff.readLine(); double hours =

问题 I have an items table in my MySQL database with a DECIMAL(10,2) field called price . When fetching these values, is it safe to do calculations and such with these numbers in PHP? Or will I end up with potential rounding errors and things like that which are common when working with floating point data types? How does PHP handle these things behind the cover? Is it safe to do money calculations with PHP? 回答1: You could make use of a PHP library that does arbitrary precision math, such as BC

问题 I'm developing a site in ASP.NET MVC 3. Property [DisplayName("Cost"), DisplayFormat(DataFormatString = "{0:F2}", ApplyFormatInEditMode = true)] public decimal Cost { get; set; } View @Html.EditorFor(x => x.Cost) The view renders Cost as 1000,00 (for example). The problem is, validation demands a point instead of a comma. How can I output 1000.00 instead of 1000,00? Or reverse the validation to accept the comma instead of a point? Edit. I've set globalization in my web.config to sv-SE (Sweden

问题 In xcode when I turn on the decimal pad keyboard option in the .xib for my textfield, and I run the application, I receive this error: Jun 13 01:22:38 Nicholas-Gibsons-iPhone Quick Utilities[1009] <Error>: CGContextSetFillColorWithColor: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It

问题 I have a problem similar to the one found here : JSF selectItem label formatting. What I want to do is to accept a double as a value for my and display it with two decimals. Can this be done in an easy way? I've tried using but that seems to be applied on the value from the inputText that is sent to the server and not on the initial value in the input field. My code so far: <h:inputText id="december" value="#{budgetMB.december}" onchange="setDirty()" styleClass="StandardBlack"> <f

问题 My question may seem simple, but still can not get something that works. I need to customize the Math.round rounding format or something to make it work as follows: If the number is 1.6 he should round to 1, if greater than or equal to 1.7 should round to 2.0 . And so to all other decimal results with # .6 The way I'm doing the 1.6 being rounded to 2 shall be rounded to 1. How can I do that? Thank you! 回答1: Simply do this: double threshold = 0.7; Math.round(x - threshold + 0.5); 回答2: You

问题 There's a way to force c# NumericUpDown to accept both comma and dot, to separate decimal values? I've customized a textbox to do it (practically replacing dots with commas), but I'm surprised that there isn't another way.. This question explains how to change the separator, but I would like to use both! 回答1: NumericUpDown control uses the culture of the operating system to use comma or dots as a decimal separator. If you want to be able to handle both separators and consider them as a

问题 I have tried to Google quite a while now for an answer why HTML entities can be compiled either in HTML decimal or HTML hex. So my questions are: What is the difference between HTML decimal and HTML hex? Why are there two systems to do the same thing? 回答1: Originally, HTML was nominally based on SGML, which has decimal character references only. Later, the hexadecimal alternative was added in HTML 4.01 (and soon implemented in browsers), then retrofitted into SGML in the Web Adaptations Annex

问题 I have tried to Google quite a while now for an answer why HTML entities can be compiled either in HTML decimal or HTML hex. So my questions are: What is the difference between HTML decimal and HTML hex? Why are there two systems to do the same thing? 回答1: Originally, HTML was nominally based on SGML, which has decimal character references only. Later, the hexadecimal alternative was added in HTML 4.01 (and soon implemented in browsers), then retrofitted into SGML in the Web Adaptations Annex