Just make ctor private/protected and provide a static method(s) to create an instance: class HeapOnly { HeapOnly(); HeapOnly( int i ); public: static HeapOnly *create() { return new HeapOnly; } static HeapOnly *create( int i ) { return new HeapOnly( i ); } }; You may consider to return a std::unique_ptr in general case, but … Read more
Sometimes (rarely) regexes are the response to the question, especially if the question is like this. bool ism1 = Regex.IsMatch(“AABAC”, @”(.)\1\1″); // false bool ism2 = Regex.IsMatch(“AAABC”, @”(.)\1\1″); // true Matches any character (.) followed by the first match (\1) twice. 0 solved C# how to check if a string contains 3 times the same … Read more
Catch!:) #include <stdio.h> #include <stdlib.h> #include <string.h> #include <stddef.h> int main(void) { char *version = “10.5.108”; char *first, *second; if ( ( second = strchr( version, ‘.’ ) ) == NULL ) { first = malloc( strlen( version ) + 1 ); strcpy( first, version ); second = malloc( sizeof( char ) ); *second = … Read more
What’s the point of “s”? It’s a variable of the type that you’ve just checked for, which you often want to use. Your example is an unfortunate one as Console.WriteLine accepts object as well… but suppose you wanted to print out the length of the string. Here’s a complete example without pattern matching: public void … Read more
Use xml linq like code below : using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Xml; using System.Xml.Linq; namespace ConsoleApplication58 { class Program { const string FILENAME = @”C:\TEMP\TEST.XML”; static void Main(string[] args) { XDocument doc = XDocument.Load(FILENAME); List<KeyValuePair<string, string>> names = doc.Descendants(“Employee”) .Select(x => new KeyValuePair<string, string>((string)x.Element(“FirstName”), (string)x.Element(“LastName”))) .ToList(); } } } solved … Read more
The using System is the basic framework that needs to be uploaded to do thing like Console.write(). With out it, you’d have to do System.Console.write. In your second example, you are just importing other framework that you might need depending on what you are developing. From the looks of it, it is a basic game … Read more
strcat() (which is a “less-safe” version of strcat_s()) requires both strings to be null-terminated. That’s because strcat() appends its second parameter (source) where first parameter (dest) ends. It replaces null-terminator of dest with first character of source, appends rest of source and then a null-character is included at the end of the new string formed … Read more
If you mean std::basic_stream::getline(), you provide a pointer to character array and the size of that array. You have to create the array somewhere by yourself. If some line is longer than sz – 1, only part of it with length sz – 1 will be read. If you don’t know the maximum length of … Read more
calculator output of 4E-7 You entered the wrong calculation into your calculator. You entered 400×10-9, instead of 400-9.These are absolutely not the same thing! The C++ program is correct: pow(400, -9) calculates 400-9, which is approximately 3.815×10-24. Here is some further reading for you: http://en.wikipedia.org/wiki/Scientific_notation#E_notation 7 solved C++ pow(400,-9) is giving wrong answer [closed]
Your return type is void, not string. Change it to: private string SQLSelection() A void is a “returnless” action that is performed upon something and does not “return” back the values of the return statement. If you try to return a value, you get a compiler error as you are experiencing. In addition, you keep … Read more
No, public is an access modifier. Virtual is a keyword as you correctly indicated, though neither refer to any .NET library in particular. They don’t refer to any attributes and it wouldn’t be correct to call them attributes for that matter. Attributes are distinctly different. How does they internally work? Please refer to the links … Read more
The framework fundamentally does not work that way. If you stay true to the framework, you can wrap your button in an update panel. That will remove the visible postback, but that will still fire the postback and perform the page load and click event. In essence the update panel will dump your entire page … Read more
Yes, a windows service would be fine. I’d like to use a little library called TopShelve to make a service / console app. Then I’d add NancyFx to expose the service and it’s data (or read it from a shared database). You also asked if there was a ‘better’ way. You might argue that polling … Read more
The random() function from stdlib.h is actually a POSIX function, not a C one. So it is only guaranteed to be available in POSIX systems, such as Linux. If you want to be portable to other C environments, use rand(). Or if you use C++, as your tag suggest, and a not too old compiler, … Read more
val is initialized to val = x ^ y; i.e. val is the bit-wise XOR of x and y, which means it contains 1 in all the bits where x and y differ and 0 in all the bits where x and y are the same. Now, each iteration of the loop performs val &= … Read more