constructor

问题 Given this struct with a private stateful variable: struct Calibrate { private: Stitcher stitcher_obj_; } This is the stitcher object (with empty constructor): Stitcher::Stitcher(const std::vector<cv::Mat> &src_images){} When calling Calibrate , I am getting this error: default constructor of 'Calibrate' is implicitly deleted because field 'stitcher_obj_' has no default constructor Stitcher stitcher_obj_ ^ Thanks for any suggestions on how to fix this! 回答1: As soon as you provide a custom

问题 I made custom interface system which uses basic UI controls like button, label, etc. Some controls have many options, so they use long constructors, and they only differ in one or two parameters. And this is work in progress, so I change optional parameters a lot, and it takes quite some time to apply changes to all constructors. public Button(string Text, Rectangle Rect, Texture2D Texture, bool moreStuff) public Button(string Text, Point Position, Texture2D Texture, bool moreStuff) public

问题 I made custom interface system which uses basic UI controls like button, label, etc. Some controls have many options, so they use long constructors, and they only differ in one or two parameters. And this is work in progress, so I change optional parameters a lot, and it takes quite some time to apply changes to all constructors. public Button(string Text, Rectangle Rect, Texture2D Texture, bool moreStuff) public Button(string Text, Point Position, Texture2D Texture, bool moreStuff) public

问题 My problem is perhaps pretty simple, but I just started programming in C#. My problem is, as listed above: "The type "MyProject.Bike" does not contain a constructor that takes '0' arguments". I don't understand, because I don't try to make a call to this constructor with empty parentheses, and reading similar questions were all answered with "You have to much/not enough parameters...". I just made this for learning, but I think inheritance is a pretty important concept, so I would like to be

问题 My problem is perhaps pretty simple, but I just started programming in C#. My problem is, as listed above: "The type "MyProject.Bike" does not contain a constructor that takes '0' arguments". I don't understand, because I don't try to make a call to this constructor with empty parentheses, and reading similar questions were all answered with "You have to much/not enough parameters...". I just made this for learning, but I think inheritance is a pretty important concept, so I would like to be

问题 What I want to know How to also apply the constructor to DOMs.selectTimes . More efficient ways to clean up my code What my code is for I made a script which creates option elements for HTML forms dynamically. I could apply birthYear/birthMonth/birthDay to a constructor. But I can't do it for selectTimes . How can I do it? OR are there any more efficient ways? Here is my code (function() { /* Fetch DOMs */ const DOMs = { selectYear: document.querySelector('#select-birthyear'), selectMonth:

问题 What I want to know How to also apply the constructor to DOMs.selectTimes . More efficient ways to clean up my code What my code is for I made a script which creates option elements for HTML forms dynamically. I could apply birthYear/birthMonth/birthDay to a constructor. But I can't do it for selectTimes . How can I do it? OR are there any more efficient ways? Here is my code (function() { /* Fetch DOMs */ const DOMs = { selectYear: document.querySelector('#select-birthyear'), selectMonth:

问题 I know that to instantiate a member inner class, you have two different constructors: First: Outer out = new Outer(); Outer.Inner in = out.new Inner(); Second: Outer.Inner in = new Outer().new Inner(); Now, I don't know why this code compiles: public class Outer { private String greeting="Hi"; protected class Inner { public int repeat=3; public void go() { for (int i =0; i<repeat; i++) { System.out.println(greeting); } } } public void callInner() { Inner in = new Inner(); //in my opinion the

问题 I know that to instantiate a member inner class, you have two different constructors: First: Outer out = new Outer(); Outer.Inner in = out.new Inner(); Second: Outer.Inner in = new Outer().new Inner(); Now, I don't know why this code compiles: public class Outer { private String greeting="Hi"; protected class Inner { public int repeat=3; public void go() { for (int i =0; i<repeat; i++) { System.out.println(greeting); } } } public void callInner() { Inner in = new Inner(); //in my opinion the

问题 I know that to instantiate a member inner class, you have two different constructors: First: Outer out = new Outer(); Outer.Inner in = out.new Inner(); Second: Outer.Inner in = new Outer().new Inner(); Now, I don't know why this code compiles: public class Outer { private String greeting="Hi"; protected class Inner { public int repeat=3; public void go() { for (int i =0; i<repeat; i++) { System.out.println(greeting); } } } public void callInner() { Inner in = new Inner(); //in my opinion the