There is an floating point precision issue in your code. When 2 floating point values are tested for equality, then an epsilon should be used: e.g. A == B should be done like fabs(A-B) < espi where A and B are floating point numbers and espi is a very small value. Change your code like … Read more
Yes, you can run a webserver with Arduino. This is the example from https://www.arduino.cc/en/Tutorial/WebServer /* Web Server A simple web server that shows the value of the analog input pins. using an Arduino Wiznet Ethernet shield. Circuit: * Ethernet shield attached to pins 10, 11, 12, 13 * Analog inputs attached to pins A0 through … Read more
Your problem seems to be that waiting for test().Result causes a dead lock. The reason is that this line await Task.Delay(1000); returns the execution flow to the caller, which then calls test().Result to wait for the task to complete. So your main thread is blocking. The await in the above line tries to resume execution … Read more
The ExecuteDataSet call takes the actual parameter values, not SqlParameter objects. Change it to simply do: var ds1 = db.ExecuteDataSet(“Getmagesbylot2”, “Bob123457”); You might also want to check that you’ve spelled the SP correctly, maybe it should be GetImagesByLot2. 2 solved Failed to convert parameter value from a SqlParameter to a String
There are one to many ways to achieve this: using System; using System.IO; using System.Xml; public class SampleXML { public static void Main() { //Create the XmlDocument. XmlDocument doc = new XmlDocument(); doc.Load(“TaskName.xml”); //Display the desired tag. XmlNodeList elemList = doc.GetElementsByTagName(“name”); for (int i=0; i < elemList.Count; i++) { Console.WriteLine(elemList[i].InnerXml); } } } or this? … Read more
Assumptions: using Lines = std::vector<std::vector<std::string>>; Lines current = { … }; // sorted on std::less<std::vector<std::string>> Lines input = { … }; // also sorted on std::less<std::vector<std::string>> Lines difference; Rather than doing std::set_difference(current.begin(), current.end(), input.begin(), input.end(), std::back_inserter(difference)); You should do auto compare = [](Lines::const_reference lhs, Lines::const_reference rhs) { assert(lhs.size() && rhs.size()) // same as default comparison, … Read more
sprintf formats a string and writes it into the character array specified by the first argument (assuming sufficient space); printf formats a string and writes it to stdout. Ex: you can do this with sprintf: char buffer[100]; sprintf(buffer, “My name is %s and I am %d years old”, “John Doe”, 25); // buffer now contains … Read more
From the little bit of code you have, the difference seems to be the scope of the variable a. What is the point of calling mpz_init(a) on a variable with only local scope (within your init() function)? After init() returns, a disappears. If you need it for anything else later, the variable a, and presumably … Read more
I don’t know if such a book exists (if it does, it’ll likely be a book about compilers). However, there’s an easier solution: try it. Write some C code, then compile it with debug symbols (these instructions assume linux): gcc foo.c -o foo Then, use a debugger: gdb ./foo break MyFunction run disass This will … Read more
The problem is here: if(0 == maps&(1<<k)){ The equality operator == has higher precedence than the bitwise-AND operator &. So the above evaluates to this: if ((0 == maps) & (1 << k )) { You need to add parenthesis to get the desired behavior: if (0 == (maps & (1 << k))) { You’ll … Read more
You need a doubly-linked list. This list uses a node class, in this case you can call it train. Each node has a name, as well as next and previous node. The list class will store the nodes. The example below is a simple version where all the members are public. You can improve it … Read more
You mix 2 things: defining 4 sets and reading them from input (as I understood from your “using scanf“). (Reading them from input makes no problem as new read values overwrite old.) Defining 4 sets in advance may be simply done by arrays: float as[4], bs[4], cs[4]; // as[0], bs[0], cs[0] is the 1st set, … Read more
This cannot work as void does not contain any member next. You must use your node structure struct tmpList * to access any members. Functions dealing with list manipulation should use the prope node type in the signature to get some type safety. If you really want to use void * in the signature, you … Read more
I think you didn’t clear the parameters. You should clear it always after your transaction. cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.AddWithValue(“@UserId”, userId); cmd.Parameters.AddWithValue(“@MonthlyIncomeName”, income.MonthIncomeName); cmd.Parameters.AddWithValue(“@MonthlyIncomeAmount”, income.MonthIncomeAmount); cmd.Parameters.AddWithValue(“@TotalMonthlyIncome”, income.MonthIncomeAmount); cmd.Parameters.AddWithValue(“@Month”, insertMonth); cmd.Parameters.AddWithValue(“@Year”, insertYear); cmd.ExecuteNonQuery(); cmd.Parameters.Clear(); // insert this line And search about AddWithValue vs Add like @cha said that check your parameter types. See this. 1 solved Stored … Read more
You need to set a CursorPosition to a given location, then need to draw a horizontal line. Like, public static void LineHorizontale(int x, int y, int length) { //This will set your cursor position on x and y Console.SetCursorPosition(x, y); //This will draw ‘-‘ n times here n is length Console.WriteLine(new String(‘-‘, length)); } if … Read more