WIN32 isn’t the correct macro. It’s actually _WIN32. Either way, that’s a macro defined by Visual Studio C++, but you’re using MinGW so the actual macro to check for is __MINGW32__ or (64). This still is the wrong way to do things, since MSDN requires: #define _USE_MATH_DEFINES // for C++ #include <cmath> In order to … Read more
One of the most fundamental things we have to do as programmers is to learn to break problems into smaller problems. You are actually running into a whole series of problems. I’m going to show you how to solve your problem. You may want to book mark this answer, because I’m pre-empting some problems you’re … Read more
There exists no function called read() in the C language. This function is a common non-standard extension used by some specific operative systems, such as Unix and MS DOS. They implemented it in compiler- and system-specific ways. Later on, the function became standardized with POSIX version of the function. It would seem that your code … Read more
As the comments and answer suggest, this is a bitwise operator. Bitwise operators treat their operands as groups of bits when they operate on them. A bitwise and will, as I’m sure you could guess, and two bits, so a truth table would look like: A | B | A & B —|—|—— 0 | … Read more
char[] chararray = this.toReverse.Text.ToCharArray(); Array.Reverse(chararray); string reverseTxt = “”; for (int i = 0; i <= chararray.Length – 1; i++) { reverseTxt += chararray.GetValue(i); } this.toReverse.Text = reverseTxt; Hope this helps 4 solved How do I reverse text in C#? [closed]
string result = string.Join(“”, numbers.Reverse()); Or even simpler: string result = string.Concat(numbers.Reverse()); 3 solved C# How to display all elements of array as a single number? [closed]
Problem: find (i,j), i<j, s.t. a[i] + a[j] = i + j I propose the following approach: Set b[i] = a[i] – i The problem becomes: find (i,j), i<j, s.t. b[i] + b[j] = 0 Complexity: O(n) Create objects c[i] = (b[i],i), a struct for example, in a std::vector (or std::array) Complexity: O(n) Sort the … Read more
You can use N format specifier as; double salary = 12345.6789; Console.WriteLine(salary.ToString(“N2”)); Result will be; 12,345.68 This specifier uses your CurrentCulture‘s NumberGroupSeparator and NumberDecimalSeparator properties by default. If these properties are not , and . in your CurrentCulture, you can provide InvariantCulture to this .ToString() method as a second parameter like; double salary = 12345.6789; … Read more
What is so difficult on D.*-.*/.*? If you want to ensure that there is at least one character for behind the D, – and / respectivly you should use .+ instead of those .*. 0 solved What regex pattern can I use to match this string? [closed]
Console.Write(“Enter HEX: “); string hexValues = Console.ReadLine(); string[] hexValuesSplit = hexValues.Split(new char[] { ‘ ‘ }, StringSplitOptions.RemoveEmptyEntries); Console.WriteLine(“HEX = DECIMAL”); foreach (String hex in hexValuesSplit) { // Convert the number expressed in base-16 to an integer. int value = Convert.ToInt32(hex, 16); Console.WriteLine(string.Format(“{0} = {1}”, hex, Convert.ToDecimal(value))); } Console.ReadKey(); P.S. : The original code does not … Read more
Try this: long int x_to_the_n (int x,int n) { int i; /* Variable used in loop counter */ int number = 1; for (i = 0; i < n; ++i) number *= x; return(number); } solved C – Writing a function for an exponent without using Pow [closed]
You can use this to convert your string value to byte: byte MyByte = Convert.ToByte(“243”); 2 solved Set the value of a new byte using a string?
I am trying to select a row [and in a comment…] I was trying to get the whole row which has several data types. Then you don’t need to Cast() or ToList(). If you want a single record, just fetch that single matching record: return database.Staff_Mod_TBLs .Single(staff => staff.Staff_No == staffNo); or, if you want … Read more
Your question is very unclear; in the future, you’ll probably get better results if you post a clear question with a code sample that actually compiles and demonstrates the problem you’re actually having. Don’t make people guess what the problem is. If what you want to do is display a double-precision floating point number without … Read more
How about this? var sum = Enumerable.Range(1,10).Where(x=> x%2==0).Sum(); 0 solved Even number’s sum from an integer