integer

问题 I'm trying to create an DataGridView on visual basic, however I'm having a problem with this RowsCount . This code is underlined blue: SQL.SQLDA.Fill(SQL.SQLDS, "GettingInfo").RowsCount It says RowsCount is not a member of integer. This is all of the code for the process: Public Sub LoadBookingData() Dim loadSQL As String = "SELECT * FROM booking" Dim RowsCount As Integer If SQL.SQLCon.State = ConnectionState.Closed Then SQL.SQLCon.open() SQL.SQLDA.Fill(SQL.SQLDS, "GettingInfo"). RowsCount =

问题 I'm using Visual Studio 2017 and I need to look at the binary representation of integer variables. How can this be achieved from the Visual Studio debugger? 回答1: Type 'var, b' in the watch, for example, 回答2: Right-click the value it’ll show a menu list, but it only give us the option of Hexadecimal Display. To display the variable with binary value in watch window, I suggest you write function to covert it : The function that in my code is: public static string ToBinaryString(uint num) {

问题 I want to figure out the relationship between bits and RNG for int or float. (By random I mean uniformly distributed) I am given a perfect boolean random generator, and I am asked to implement a random 32 bits integer generator (including negative, zero and positive). What I want to do is generate a random boolean for each of the 32 bits, and concat them together to be a random int . Am I doing the right thing? Also from the other way around, if I am given a perfect random 32 bits integer

问题 Is there a way in C or C++ to check whether the number provided by the user is outside the range of an integer type? For instance, let us assume that we are using 16-bit signed integers with a range of -32768 to 32767. If the user enters 55555 into the program, this will be wrapped to become a negative number so that if you are using a function which can accept any number, the result would be wrong. Is there a way in C or C++ to determine whether the number provided by the user is within the

问题 I am using swift 4 and am using this implementation of BigInt: https://github.com/attaswift/BigInt I noticed there are no native methods to convert a BigInt or NSDecimalNumber into a [UInt8], do any of you know a good implementation of this as I have not been able to find one. Thank you 回答1: BigUInt has a /// Return a `Data` value that contains the base-256 representation of this integer, /// in network (big-endian) byte order. public func serialize() -> Data method (see Data Conversion.swift

问题 I'm trying to take an integer as a parameter and then use recursion to double each digit in the integer. For example doubleDigit(3487) would return 33448877 . I'm stuck because I can't figure out how I would read each number in the digit I guess. 回答1: To do this using recursion, use the modulus operator (%), dividing by 10 each time and accumulating your resulting string backwards, until you reach the base case (0), where there's nothing left to divide by. In the base case, you just return an

问题 How do I save an integer that can be overwritten and then read it on android? I am using libgdx. I know how to do it for my desktop, but I want internal storage. 回答1: You should use libgdx Preferences . That way it will work cross-plattform! (including Android) Since you just want to store some Integer that should be just what you need. See example: //get a preferences instance Preferences prefs = Gdx.app.getPreferences("My Preferences"); //put some Integer prefs.putInteger("score", 99); /

问题 I'm learning sockets programming in c (Linux), and I can't really understand why is it necessary to use htonl when you are sending an integer, but not when you are sending a string (char*). I've read a lot of papers, but I still don't know why. 回答1: It's because data sent through networks are sent in Big Endian order. Different platforms store data in different orders. Say you have a short of 0x9FD3. On a Small Endian platform, it'll be stored in memory as 0xD39F. The first byte is 0xD3, and

问题 I'm starting with Java, and my problem is that I have an Arraylist of objects("Articulos", means Articles), and this object has properties (like name, price, etc...). I want to sort the Arraylist by the price of each object. Here's what I've tried. First, I fill the Arraylist manually: public static void Introducir_Articulo(){ Articulo a=new Articulo(); System.out.println("Codigo del articulo: "+(art.size()+1)); if(a.codArt==0){ a.codArt++; } else { a.codArt+=art.size(); } System.out.println(

问题 This question already has answers here : What is the difference between an int and an Integer in Java and C#? (26 answers) Closed 5 years ago . which is the best way to set already defined int to null ? private int xy(){ int x = 5; x = null; //-this is ERROR return x; } so i choose this private int xy(){ Integer x = 5; x = null; //-this is OK return (int)x; } Then i need something like : if(xy() == null){ // do something } And my second question can i safely cast Integer to int? Thanks for