decimal

问题 This is killing me! I've never had so much trouble and I can't figure out what I'm doing wrong here. If I have a number, say 2.32, and I want to do math with it it won't work out. The very simplest example: $income = $commission; //Commission is 2.32, retrieved from XML echo "income: $income<br>"; $income100 = $income*100; echo "income100: $income100<br>"; The result I get is: income: 2.32 income100: 200 How can I use a decimal number accurately with math without it changing it? Thanks so

问题 I have a decimal field to represent money in my Eloquent Model and I'm noticing erroneous results when trying to add some number to this field. Upon further inspection, I found that the decimal field is being cast as a string , like "1245114.00" in the tinker console. I checked the table structure and I can verify that the field is indeed decimal(11,3) . This question was asked before but has no answers. Why is this happening? 回答1: You need to define in your model which fields need to be cast

问题 I have the following int 7122960 I need to convert it to 71229.60 Any ideas on how to convert the int into a decimal and insert the decimal point in the correct location? 回答1: int i = 7122960; decimal d = (decimal)i / 100; 回答2: Simple math. double result = ((double)number) / 100.0; Although you may want to use decimal rather than double : decimal vs double! - Which one should I use and when? 回答3: Declare it as a decimal which uses the int variable and divide this by 100 int number = 700

问题 I'm using C# to set a default value for a decimal value in my config class public class ConfigSection : ConfigurationSection { [ConfigurationProperty("paymentInAdvanceAmount", **DefaultValue = 440m**)] public decimal PaymentInAdvanceAmount { get { return (decimal)base["paymentInAdvanceAmount"]; } set { base["paymentInAdvanceAmount"] = value; } } } but it won't be compiled and throws an error An attribute argument must be a constant expression, typeof expression I found a post says: "It's not

问题 I got this problem with double (decimals). When a double = 1.234567 Then I use String.format("%.3f", myString); So the result is 1.234 But when my double is 10 The result will be 10,000 I want this to be 10 Is their a way to say that he only needs to show the decimals when it is "usefull"? I saw some posts about this, but that was php or c#, couldn't find something for android/java about this (maybe I don't look good). Hope you guys can help me out with this. Edit, for now I use something

问题 So I've decided to try to solve my physics homework by writing some python scripts to solve problems for me. One problem that I'm running into is that significant figures don't always seem to come out properly. For example this handles significant figures properly: from decimal import Decimal >>> Decimal('1.0') + Decimal('2.0') Decimal("3.0") But this doesn't: >>> Decimal('1.00') / Decimal('3.00') Decimal("0.3333333333333333333333333333") So two questions: Am I right that this isn't the

问题 I am using Entity Framework 6.x using the Code First approach on an MVC 5 application. In this particular situation my model (among other things) contains two properties named Latitude and Longitude: [Required, Range(-90, +90)] public decimal Latitude { get; set; } [Required, Range(-180, +180)] public decimal Longitude { get; set; } And when I performed the migration I got something like this CreateTable("ResProperty"), c => new { : Latitude = c.Decimal(nullable: false, precision: 10, scale:

问题 i am making application in c#. In that implication i have string which contain decimal value as string number="12000"; The Hex equivalent of 12000 is 0x2EE0. Here i want to assign that hex value to integer variable as int temp=0x2EE0. Please help me to convert that number. Thanks in advance. 回答1: An int contains a number, not a representation of the number. 12000 is equivalent to 0x2ee0: int a = 12000; int b = 0x2ee0; a == b You can convert from the string "12000" to an int using int.Parse().

问题 I get bytes from the serial port which represents the voltage on my PIC board. But I can't convert these bytes(strings) to decimal because I get the error message above. Here is the function(in fact, it's associated with tkinter button) def channel8(): ser.write(chr(0xFF)) print "you have select channel8" x=ser.read(2) w=int(x, 16) print w print "Voltage on channel8 is:" , x ValueError: invalid literal for int() with base 16: '\x0e\xa3' def channel8(): ser.write(chr(0xFF)) print "you have

问题 I have a scenario in a java web app, where a random hexadecimal value has to be generated. This value should be within a range of values specified by me. (The range of values can be hexadecimal or integer values). What is the most efficient way to do this> Do I have to generate a random decimal number, and then convert it to hexadecimal? Or can a value be directly generated? 回答1: Yes, you just generate a decimal value in your range. Something such as: Random rand = new Random(); int