non-static

问题 I have read many posts and answers about pointers to non-static member functions, but none looks able to solve my problem. So I have created a short example to replicate my issue here: even if this example could be "solved" in different ways, for the final software it is important to keep the structure like in the example, thanks. This is the header of the class "Funcs.h": class Funcs { private: double a = 1, b = 2; public: Funcs(); ~Funcs(); double Fun1(double X); double solver(double X0);

问题 I have read many posts and answers about pointers to non-static member functions, but none looks able to solve my problem. So I have created a short example to replicate my issue here: even if this example could be "solved" in different ways, for the final software it is important to keep the structure like in the example, thanks. This is the header of the class "Funcs.h": class Funcs { private: double a = 1, b = 2; public: Funcs(); ~Funcs(); double Fun1(double X); double solver(double X0);

问题 This question already has answers here : Java: how to call non static method from main method? (9 answers) Closed 4 years ago . For example, I am trying to do something like this public class Test { public static void main(String args[]) { int[] arr = new int[5]; arrPrint(arr); } public void arrPrint(int[] arr) { for (int i = 0; i < arr.length; i++) System.out.println(arr[i]); } } I get an error telling me that I can't reference non-static variables from static enviorments. So if that is true

问题 This question already has answers here : Java: how to call non static method from main method? (9 answers) Closed 4 years ago . For example, I am trying to do something like this public class Test { public static void main(String args[]) { int[] arr = new int[5]; arrPrint(arr); } public void arrPrint(int[] arr) { for (int i = 0; i < arr.length; i++) System.out.println(arr[i]); } } I get an error telling me that I can't reference non-static variables from static enviorments. So if that is true

问题 With reference to Non-static member functions, under const-, volatile-, and ref-qualified member functions it is mentioned: A non-static member function can be declared with no ref-qualifier, with an lvalue ref-qualifier (the token & after the parameter list) or the rvalue ref-qualifier (the token && after the parameter list). During overload resolution, non-static cv-qualified member function of class X is treated as follows: no ref-qualifier: the implicit object parameter has type lvalue

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 6 years ago . public class A{ { System.out.println("hi i am IIB"); } public A(){ System.out.println("hi i am constructor"); } public static void main(String... args){ A objA=new A(); } } 回答1: iib will get execute before the constructor is called No, this is not what happens. The code written in instance

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 6 years ago . public class A{ { System.out.println("hi i am IIB"); } public A(){ System.out.println("hi i am constructor"); } public static void main(String... args){ A objA=new A(); } } 回答1: iib will get execute before the constructor is called No, this is not what happens. The code written in instance

问题 I am trying to access a static member from a non-static function in the class, and I get an error saying Static member cannot be accessed off an instance variable this is how my code looks - class myClass { public static testStatic: number = 0; public increment(): void { this.testStatic++; } } From what I understand of static members/methods, we shouldn't access non-static members in static functions, but vice-versa should be possible. the static member is already created and is valid, so why

问题 Here's what I have. public static void Person_home_phone_TextChanged(object sender, EventArgs e) { ... } Is there any way to access non-static methods from the same or another class from inside this static method? I need grab the text in the Person_home_phone text box and save it to a class data member. 回答1: Example() -> Example You would just need to create an instance of the type then call the non-static , from a static method. public class Example(){ public static void StaticExample() {

问题 I have a weird issue using polymorphism. I have a base class that implements a static method. This method must be static for various reasons. The base class also has a pure virtual method run() that gets implemented by all the extended classes. I need to be able to call run() from the static class. The problem, of course, is that the static class doesn't have a this pointer. This method can be passed in a void * parameter. I have been trying to come up with a clever way to pass the run method