[ad_1] I’ll update this as you update your question, but here’s my best guess. This line doesn’t compile, because Select doesn’t return a List: List<Task<T>> myTasks = someList.Select(x => Task.Run(() => DoSomethingWith(x))); I’m going to hazard a guess that you’re actually doing this: var myTasks = someList.Select(x => Task.Run(() => DoSomethingWith(x))); … which produces a … Read more
[ad_1] Well it doesn’t matter if you choose to use a foreach or while loop because a foreach loop is actually broken into a while loop after it has been compiled to IL. Take a look at this foreach loop: IEnumerable<int> enumerable = Enumerable.Range(1, 100); foreach (int e in enumerable) { } After it has … Read more
[ad_1] An extra speed up to solution of Aconcagua can be obtained when you realize that all primes bigger than 3 can be written as 6n+1 or 6n+5 for natural n. Or even further, all primes bigger than 5 can be written as 30n+m, with m in {1,7,11,13,17,19,23,29}. This is what is called Wheel factorization. … Read more
[ad_1] This code compiles cleanly using GCC 4.8.2 on Mac OS X 10.9.1 Mavericks with the command line: gcc -O3 -g -std=c11 -Wall -Wextra -Wmissing-prototypes -Wstrict-prototypes \ -Wold-style-definition -Werror bits.c -o bits Source: #include <math.h> #include <stdio.h> #include <string.h> extern int twosComplement(int number); int twosComplement(int number) { printf(“searching for twos complement of %d\n”, number); int … Read more
[ad_1] All you have to do is this add this line after reading both lenght and depth values: double total = compute(length, depth); You’re telling that total will be what return from method compute. Remember to send the parameters to method, and always call the method after you read both values, otherwise they’ll be zero … Read more
[ad_1] It looks like you are trying to do something similar to this: #include <stdio.h> double hullSpeed(double lgth) { double result; __asm__( “fldl %1\n\t” //st(0)=>st(1), st(0)=lgth . FLDL means load double float “fsqrt\n\t” //st(0) = square root st(0) “fmulp\n\t” //Multiplies st(0) and st(1) (1.34). Result in st(0) : “=&t” (result) : “m” (lgth), “0” (1.34)); … Read more
[ad_1] You need to initialize the vector in A‘s constructor: #include <vector> class A { std::vector<double> a; public: A() : a(20) {} }; [ad_2] solved Why i cannot make vector in c++ class [duplicate]
[ad_1] The name of the class is the primary identifier that is used to discern the different between types, that is why within a given namespace, you cannot have duplicate class names. The hint is that it is called a name space, within a given space all the classes will have unique names. Perhaps a … Read more
[ad_1] It’s const char* p = “C language”;, not char* const. They have different meanings: const char* p means that the chars to which p points to, cannot be modified; while char* const p means that the pointer p itself cannot be modified. *p = “Change”; is not the correct way to change string’s content. … Read more
[ad_1] Using Xml Linq : using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Xml; using System.Xml.Linq; using System.Data; namespace ConsoleApplication1 { class Program { const string FILENAME = @”c:\temp\test.xml”; static void Main(string[] args) { DataTable dt = new DataTable(); dt.Columns.Add(“Make”, typeof(string)); dt.Columns.Add(“Make Attribute”, typeof(string)); dt.Columns.Add(“Model”, typeof(string)); dt.Columns.Add(“Model Attribute”, typeof(string)); dt.Columns.Add(“Year”, typeof(string)); dt.Columns.Add(“Year Attribute”, typeof(string)); … Read more
[ad_1] Complete ownerdraw of TreeView is hard. It is so hard that Lutz Roeder of Reflector fame didn’t implement it fully. It is so hard that even Microsoft gave up on it. Consider the Windows 7 style: Note the black triangle for an expanded node, the hollow one for a collapsed node. Esthetically pleasing, very … Read more
[ad_1] The printf function has the following declaration: int printf(const char *format, …); The first argument must be a pointer to a char array, but any additional arguments can be of any type, so it’s not a compiler error if a format specifier mismatches the parameter (although it is undefined behavior). This still works however … Read more
[ad_1] To get the numbers with 0 padded on left, you will have to use string format. int doy = DateTime.Now.DayOfYear;// Day of the year string yr = DateTime.Now.ToString(“yy”);// Two digit year string mon = DateTime.Now.Month.ToString(“d2”); // Two digit month (zero on left for small numbers) string day = DateTime.Now.Day.ToString(“d2”); // Two digit day (zero … Read more
[ad_1] The problem here is you are comparing a List<string> and a string for equality. There is no such comparison available in C# hence an error is produced. If you are attempting to determine if the string is present in the list then do the following instead if (id.Contains(Convert.ToString(row[tid]))) 0 [ad_2] solved operator == can … Read more
[ad_1] change scanf(“%s”, &input); to scanf(” %c”, &input); and get rid of getchar()s at the end. It will work as you wanted. %c specifier reads a char character, but it does not omit whitespace characters. Putting space onto scanf’s format will deal with whitespaces and read first non-whitespace char. To be more clear, see what … Read more