[ad_1] Time for a crash course on arrays in C. First of all, let’s fix the initializer for the array: int a[3][4] = { { 1, 2, 3, 4}, { 5, 6, 7, 8}, { 9, 10, 11, 12} }; This defines a 3-element array of 4-element arrays of int. The type of the expression … Read more
[ad_1] This is a trick question. Presumably someone thought you could learn something from it. Presumably this person also thinks that a good way to teach a child to ride a bicycle is to flatten the bicycle’s tires, and put large boulders in the way, and randomly give the child a rough shove to the … Read more
[ad_1] Your query executes an INSERT (IE. Adds data to your table) It doesn’t retrive any record. The INSERT statement in T-SQL could use a SELECT subquery to feed the values that are requested by the columns listed after the INSERT. So your query add a new record every time you run it, but there … Read more
[ad_1] #include <stdio.h> int temp(int fahr) { return 5*(fahr-32)/9; } int main() { int fahr, celsius; printf (“Enter fahrenheit value here: “); scanf(“%d”, &fahr); celsius = temp(fahr); printf (“The Celsius value is: %d “, celsius); return 0; } 2 [ad_2] solved Not getting the correct answer
[ad_1] void *ptr=10; This is not valid C, you need an explicit conversion with a cast like (void *) 10. printf(“%u”,ptr); This is not valid C, you need an explicit conversion with a cast like (unsigned int) ptr. Regarding the use of void pointers, they are generic object pointers, so you can assign a pointer … Read more
[ad_1] Read a good C++ programming book then see this C++ reference. Read also the documentation of your C++ compiler (perhaps GCC). Read also some operating system textbook. Consider using frameworks such as POCO or Qt or Wt. With a multi-core processor, you might use C++ threads. You’ll need to synchronize them, e.g. using mutex … Read more
[ad_1] You are confusing strings and characters. A character literal is enclosed in ‘. A string literal is enclosed in ” and is an array of characters. e.g.: “This is a string literal” ‘c’ // this is character To test if a char is not z for instance, you write: char c = …; if … Read more
[ad_1] As a matter of fact you’re not trying to raise an event, but subscribe to one. The IntelliSense error that you get when converting that code to VB.NET is unfortunately a bit misleading. In terms of events, C#’s += operator is equal to Delegate.Combine() which adds another delegate to an event’s subscribers list (list … Read more
[ad_1] The out keyword causes arguments to be passed by reference. This is like the ref keyword, except that ref requires that the variable be initialized before it is passed. To use an out parameter, both the method definition and the calling method must explicitly use the out keyword. For example: class OutExample { static … Read more
[ad_1] using System; using System.Collections.Generic; using System.Text; using Microsoft.PointOfService; namespace POS { public class CashDrawerClass { CashDrawer myCashDrawer; PosExplorer explorer; public CashDrawerClass() { explorer = new PosExplorer(this); DeviceInfo ObjDevicesInfo = explorer.GetDevice(“CashDrawer”); myCashDrawer = explorer.CreateInstance(ObjDevicesInfo); } public void OpenCashDrawer() { myCashDrawer.Open(); myCashDrawer.Claim(1000); myCashDrawer.DeviceEnabled = true; myCashDrawer.OpenDrawer(); myCashDrawer.DeviceEnabled = false; myCashDrawer.Release(); myCashDrawer.Close(); } } } try that. … Read more
[ad_1] The method builds because it’s perfectly valid C#. Those are labels. They are part of the goto construct that C# inherited from C / C++ that allows execution to jump to a specific point within the method. It’s use is generally discouraged. From 8.4 Labeled statements A labeled-statement permits a statement to be prefixed … Read more
[ad_1] your json is not valid. But if you remove an extra braket at the start and the end of a string json = json.Substring(1,json.Length-2); then you can parse it using Newtonsoft.Json; var jsonObject = JObject.Parse(json); int density = (int)jsonObject[“density”]; double[] coordinates = jsonObject[“geometry”][“coordinates”].ToObject<double[]>(); 1 [ad_2] solved Deserializing Json string c# [closed]
[ad_1] #include <stdio.h> #include <string.h> double myfunction(const void *data){ double v; memcpy(&v, data, sizeof(v)); return v; } int main (int argc, char *argv[]) { unsigned char data[] = {0x40,0x20,0,0,0,0,0,0}; int i, len = sizeof(data); //reverse data If necessary for(i=0;i<len/2;++i){ unsigned char c = data[i]; data[i] = data[len -1 -i]; data[len -1 -i] = c; } … Read more
[ad_1] Possibly you are conflating a new-expression with operator new. An operator new is an allocation function, with a confusing name. It should better have been called _alloc or some such. A new-expression calls the allocation function, passing any specified arguments. if that succeeds, calls the class constuctor with specified arguments.Here the relevant constructor must … Read more
[ad_1] According to the C++ Standard (4.2 Array-to-pointer conversion) 1 An lvalue or rvalue of type “array of N T” or “array of unknown bound of T” can be converted to a prvalue of type “pointer to T”. The result is a pointer to the first element of the array. So for example if you … Read more