You are trying to write execution code inside of a class. Please close it in a method, or any other execution code block and it will be ok. Following this article: https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/class A class can contain declarations of the following members: Constructors Constants Fields Finalizers Methods Properties Indexers Operators Events Delegates Classes Interfaces Structs I … Read more
It’s actually working correctly. There is a leading space on the string and thus the ninth index is the space just before the DU. Consider this diagram: Jun30/13 DU SJ9802 0123456789 You’re starting on the ninth index, and that’s a space . 1 solved string.Substring not working correctly in C#
That’s the definition of an abstract class. You cannot create an instance of it, only a type derived from it. Think of something like a fruit. You cannot have a fruit sitting on the table. It must be a certain type of fruit, such as an orange or an apple. In this case, fruit would … Read more
The condition i==j+1 will not be true for i==2. This can be fixed by a couple of changes to the inner loop: #include <stdio.h> int main(void) { for (int i=2; i<100; i++) { for (int j=2; j<=i; j++) // Changed upper bound { if (i == j) // Changed condition and reversed order of if:s … Read more
Your braces and try{} catch{} blocks are mismatched. Here is the corrected code: public partial class frmPersonnel : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void btnSubmit_Click(object sender, EventArgs e) { try { DateTime dt1; DateTime dt2; if (txtFirstName.Text == “”) { txtFirstName.BackColor = System.Drawing.Color.Yellow; lblError.Text = “Please enter first name”; … Read more
System.IO.File.Move(oldFileName, Path.ChangeExtension(oldFileName, ‘old’)); solved How can I rename .TXT files to .OLD using C#? [closed]
Just to clarify. It is impossible to extern the class: class Outside { public: Outside(int count); GetCount(); } But, once you have the class available in framework.cpp, you CAN extern an object of type Outside. You’ll need a .cpp file declaring that variable: #include “outside.h” Outside outside(5); And then you can refer to that object … Read more
Those are both undefined behavior. You are trying to modify memory that you did not allocate. The second is even less safe, because you are assuming a is going to be allocated to that address every time, which is absolutely not a safe assumption. 3 solved What is the difference between assigning a pointer to … Read more
First of all, your code doesn’t compile in most machines. Reason? cout and cin are parts of the Standard namespace std, which means that you cannot access them unless you use the appropriate commands. This can be done in two ways: Write std::cout instead of cout. This tells the compiler that you want to access … Read more
.Split will delete the delimiter characters, and the resulting output will not include them. From MSDN: Delimiter characters are not included in the elements of the returned array. If you need to find the length of a line, just use the .Length property of the string. In any case, as mentioned in the comments, use … Read more
if you want to generate random numbers in range without repeating, you can try this: public static List<int> GenerateNumbers(int mn,int mx) { List<int> source = new List<int>(); for (int i = mn; i <= mx; i++) source.Add(i); var random = new Random(); List<int> randomNumbers = new List<int>(); while(source.Count != 0) { int randomIndex = random.Next(source.Count); … Read more
The problem is that you define a type (account) in the class. account is a type so you should not declare it in the class : struct account { std::string name; float money; short pin; }; and then, the class becomes : class CBank { public: CBank(); account acc; std::vector<account> add; }; and the main … Read more
So if I get it correct, you want to append new data to your existing xml. For that you can chose to temporarily store the current xml and and add new data to it using Linq Xml. To do this, now you need to modify your current code with an additional check for xml file … Read more
I think this is basically the Travelling Salesman problem. You’ve got N destinations, and each pair of destinations has a concrete length between them, and you’re trying to find out the shortest travel time to visit all destinations. You’ve got two different directions to pursue this, that I can see. First, is to read up … Read more
80-bit long double (not sure about its size in MSVS) can store around 18 significant decimal digits without loss of precision. 1300010000000000000144.5700788999 has 32 significant decimal digits and cannot be stored exactly as long double. Read Number of Digits Required For Round-Trip Conversions for more details. 8 solved Blatant floating point error in C++ program