definition

问题 I'm having a problem with a Windows Form application I'm building in C#. The error is stating "foreach statement cannot operate on variables of type 'CarBootSale.CarBootSaleList' because 'CarBootSale.CarBootSaleList' does not contain a public definition for 'GetEnumerator'". I can't seem to understand what is causing this. This is the code that is throwing up the error: List<CarBootSaleList> Sortcarboot = new List<CarBootSaleList>(); foreach (CarBootSale c in carBootSaleList) { if (c.Charity

问题 The problem is basically about to generate a arithmetic expression from a given 'n' numbers , and the expression should be divisible by 101. we can only have +,-,* operators and expression is left associative. I have tried all the available solution on , that are already mentioned on stack overflow, like closing the expressions with else and many more bool calci(int a[],int n,int sum,int pos,char operato[],deque<int>&q,deque<char>&qc) { if(sum%101==0) { //cout<<"sum:"<<sum<<endl; return true;

问题 The problem is basically about to generate a arithmetic expression from a given 'n' numbers , and the expression should be divisible by 101. we can only have +,-,* operators and expression is left associative. I have tried all the available solution on , that are already mentioned on stack overflow, like closing the expressions with else and many more bool calci(int a[],int n,int sum,int pos,char operato[],deque<int>&q,deque<char>&qc) { if(sum%101==0) { //cout<<"sum:"<<sum<<endl; return true;

问题 I'm working on porting some old K&R code to ANSI C, so I'm writing missing function prototype declarations. A lot of the function definitions have parameters with the register storage class, but I'm not sure if the register storage class specifier can be omitted in the function prototype? With and without the register storage class specific declaration, the code compiles correctly (I tried GCC, VC++ and Watcom C). I could not find any information in the ISO/ANSI C89 standard on what is the

问题 When someone is calling a function by "SOME" or "ANY" makes me unsure about this. Can I think about "SOME" as "OneOf" or "OneFrom"? Like an array (table) searching function? If yes, then what's the difference between SOME and IN? I am total newbie with SQL Sorry for my bad english, for some reason I think I am little overtired to use it correctly now 回答1: Check the following link for some examples that should clarify the difference between them: http://technet.microsoft.com/en-us/library

问题 This question already has answers here : C++: “Class namespaces”? [duplicate] (4 answers) Closed 7 years ago . In C++, all I want to do is declare a DisplayInfo class in a .h file, and then in the .cpp file, not have to type the first DisplayInfo::DisplayInfo() and every function definition. Sadly, I've looked at over 20 topics and my C++ book for over two hours now and have not been able to resolve this. I think it's because I'm trying to use my 10-year-old java training in C++. 1st trial: /

问题 I tried to look at other related posts but I'm sill stuck My header files looks something like this Node.hpp #include<iostream> using namespace std; #ifndef NODE_HPP #define NODE_HPP struct Node { int value; Node *start; Node *end; } *start, *end; int count= 0; #endif and Queue.hpp #include<iostream> using namespace std; #ifndef QUEUE_HPP #define QUEUE_HPP #include "Node.hpp" class Queue{ public: Node *nNode(int value); void add(int value); void remove(); void display(); void firstItem();

问题 This question already has answers here : Normal arguments vs. keyword arguments (10 answers) Closed 6 years ago . This is an example of of code from here: What does the equality mean in the argument assignment to function? like N=20000 here? What is the difference between that and simply N as argument? import random,math def gibbs(N=20000,thin=500): x=0 y=0 samples = [] for i in range(N): for j in range(thin): x=random.gammavariate(3,1.0/(y*y+4)) y=random.gauss(1.0/(x+1),1.0/math.sqrt(x+1))

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 8 years ago . For most of you this is probably common sense but I am finding it very, very hard to get a handle on this. If you create a function such as def one(): x=1 y=2 z=3 h=33 j=454 l=353 m=898 then lets say I have

问题 So, we all know recursive functions, right? But what exactly is it, that makes a function recursive? I had a small discussion in the comment section of another question (Lightening effect with javascript) that kind of challenged my view of recursive functions but it also left me with a quite unsatisfying lack of proper definition. My personal definition of recursive functions so far was the following: A function is recursive if it directly or indirectly invokes itself Note: I will provide