switch-statement

问题 C++ newbie trying to make a simple text game on a 2D array. When I use the switch statement as shown. It will always print the default value, regardless of what else happens. From other threads and forums I found it probably has something to do with the getch() and that it returns the char as well as \n . I have tried for an hour now but I can not solve this. The reason I use getch() is this: C++ change canonical mode in windows (for reference). Part of my code now: //Set up game field

问题 My system clock is 9/16/2014 (Tuesday) But in code, I'm always jumping to Monday. DayOfWeek dow = new DateTime().DayOfWeek; int columnNumber = 0; columnNumber = columnNumber + 0; foreach ( DataGridViewRow row in dataGridView1.Rows ) { switch ( dow ) { case DayOfWeek.Monday: columnNumber = 4; if ( (bool) row.Cells[4].Value == true ) // crashing here with NullReferenceException { row.Cells["activeTodayDataGridViewCheckBoxColumn"].Value = true; } break; I have a DataGridView Columns 0—3 are Text

问题 I have created a TypeSwitch class to cast my fields using a code similar to the following shortened sample: static Dictionary<Type, int> TypeDefs = new Dictionary<Type, int>() { {typeof(Int16), 1}, {typeof(Int32), 2}, {typeof(Int64), 3}, {typeof(IntPtr), 4}, ... {typeof(String), 18} }; public static object ConvertFromDBValue(Type type, object value) { try { switch (TypeDefs[type]) { case 1: // {typeof(Int16), 1}, { return Convert.ToInt16(value); } case 2: // {typeof(Int32), 2}, { return

问题 My case value text is always be equals to the relevant OSResultStruct in the code for "The way i have it implemented now and is working".So for example if the case is osedition then the property is OSResultStruct.OSEdition. Is it possible to do something like the line of code below? If so then i can replace my switch statement with one line of code. lstNewItems[i].sItemValue = OSresult.OSResultStruct."lstNewItems[i].sItemName.ToString().ToUpper()"; The way i have it implimented now and is

问题 Have a SQL table like this: Titles Device1 Device2 Device3 Title1 inputA inputA inputB Title2 inputA inputB inputC Title3 inputB inputB inputB I want the values inputA, inputB, inputC to each appear once in each row with their corresponding fields, Device1, Device2, Device3, appearing as an array following the "input" values like this: Titles header1 header2 header3 Title1 inputA: inputB: Device1 Device3 Device2 Title2 inputA: inputB: inputC: Device1 Device2 Device3 Title3 inputB: Device1

问题 I've only been working with JavaScript, and programming in general, for about a month now and came across a problem which I just can't find a solution to. So here I am. I've created a gallery where you can click small images to zoom them up in a new "window" (it's just a div placed ontop of the rest of the page) for a better view of the picture. And here's the tricky part. I want to be able to change image when I press the arrow keys. For example, if I press the right arrow key on my keyboard

问题 I need to add certain parts of the numerical string. for example like. 036000291453 I want to add the numbers in the odd numbered position so like 0+6+0+2+1+5 and have that equal 14. I tried the charAt(0)+charAt(2) etc, but it returns the digit at those characters instead of adding them. Thanks for your help. 回答1: I tried the charAt(0)+charAt(2) etc, but it returns the digit at those characters instead of adding them. Character.getNumericValue(string.charAt(0)); 回答2: Use charAt to get to get

问题 Can someone please help me and tell what is wrong with my code. I made the solution using switch case and replace the punctuations with empty string. #include<stdio.h> #include<string.h> int main() { char st[50]; int i; printf("ENter the string:\n"); gets(st); for(i=0;i<strlen(st);i++) { switch(st[i]) { case '!': case '"': case '#': case '$': case '%': case '&':strcpy(st[i]," "); break; } printf("String is:\n"); puts(st); } return 0; } 回答1: strcpy(st[i]," ") is wrong use st[i]=' ' ; (strcpy

问题 For some reason i'm loosing access to my variables inside the switch statement, I am not allowed to use any global variables. import java.util.Scanner; public class Projet { public static void main(String[] args) { String clef="vide"; Scanner in = new Scanner(System.in); showMenu(in); in.close(); } Main method is kept as clean as possible ... calling the menu just once. public static void showMenu(Scanner in){ System.out.printf("******************************************%n" + "* Choisissez

问题 I'm learning reactive programming with Reactor and I want to implement registration scenario where a user can have many accounts assigned to the same profile. However the username assigned to the profile and the phone assigned to the account must be unique. As you can see in the following snippet, this scenario will be easy to implement if Reactor was offering the operator switchIfNotEmpty . public Mono<PersonalAccountResponse> createPersonalAccount(PersonalAccountRequest request) { return