Is something like what I expected standardized in C++17 No. , or proposed for standardization later? There is no such proposal in any of the mailings. Though of course there’s plenty of easy workarounds, so there’s little reason for such a proposal: oy ? std::max(x,*oy) : x; x < oy ? *oy : x *std::max(oint(x), … Read more
This is a subjective question. Personally I would tend to agree that having class here at all is poor form, and typename should have been the only keyword allowed. But that’s just my opinion. Perhaps this usage of class will be deprecated in the future; perhaps there are sufficient people who like to write class … Read more
This problem has nothing to do with nested loops. The following code snippet is nonsense and the compiler ties itself into knots trying to understand it: int main() { std::vector<int> v = {0, 1, 2, 3, 4, 5}; for (int i : v) { for (int a : i) std::cout << a << ‘ ‘; … Read more
we are using push_back on an rvalue No, that’s not the problem. any stores a copy of what it is given. It doesn’t reference some other object. It creates an object from what it is given. So even if you get a reference to the object in the any, it wouldn’t be a reference to … Read more
Yes. It is implementation-defined. According to C++03 5.8/3 which defines right-shifting: The value of E1 >> E2 is E1 right-shifted E2 bit positions. If E1 has an unsigned type or if E1 has a signed type and a nonnegative value, the value of the result is the integral part of the quotient of E1 divided … Read more
You can’t declare the array unknown size. You must do it dynamically. #include <iostream> using namespace std; int main() { int n = 0, m = 0; //. Get the matrix’s size while (true) { cout << “Input the row count: “; cin >> n; cout << “Input the column count: “; cin >> m; … Read more
You can make use of CRTP. Add a templated second base class to hold the ID handling code. template <class T> class ComponentID { public: ComponentID(std::string &id_) { // Same as updateID above } }; class Wire: public Component, ComponentID<Wire> { public: Wire(const std::string& name = “Wire”) : Component(name), ComponentID(id_) { } // … }; … Read more
Introduction Code duplication is a common problem in software development, and it can lead to a number of issues such as increased complexity, decreased readability, and decreased maintainability. Fortunately, there are a number of techniques that can be used to remove or minimize code duplication and provide the same functionality and behavior. In this article, … Read more
Depending on the file structure (does it contain line/column headers, single/multi-line?) you use QString::split() to get a QStringList per line. Then you assign the stringlist items to the variables according to your csv structure knowledge. 0 solved Qt separating csv file and storing to differnt variables
I don’t exactly know what you want to achieve, but I think this is what you’re looking for. #include<iostream> #include<string> using namespace std; int main() { string user; /* —- This part is in place of your python code — */ cout << “Please Enter your name”; cin >> user; cout << “Your name is” … Read more
First I assume you have some basics that look like this #include <iostream> struct vec2 { double x; double y; }; std::ostream& operator<<(std::ostream& stream, vec2 v2) {return stream<<v2.x<<‘,'<<v2.y;} //real methods vec2 translate(vec2 in, double a) {return vec2{in.x+a, in.y+a};} //dummy placeholder implementations vec2 rotate(vec2 in, double a) {return vec2{in.x+1, in.y-1};} vec2 scale(vec2 in, double a) {return … Read more