super() lets you avoid referring to the base class explicitly, which can be nice. But the main advantage comes with multiple inheritance, where all sorts of fun stuff can happen. See the standard docs on super if you haven’t already. Note that the syntax changed in Python 3.0: you can just say super().__init__() instead of … Read more
Shoe roshe = new Nike(“roshe”, 11, “black”, “fashion”, 129.0, false) String literals should be enclosed in double quotes. As for your change in size type, pass int array instead of int int s[] = {11,12,13}; Shoe roshe = new Nike(“roshe”, s, “black”, “fashion”, 129.0, false) or Shoe roshe = new Nike(“roshe”,new int[]{11, 12, 13} , … Read more
The object that you’re extending,Event, does not have a constructor that takes no arguments. So you need to call super and specify arguments like you do in your other constructor.
Create default constructor in your base class. your sub class constructor implicitly calls default constructor of base class. if you want initialze your base class with sub class elements, you can call super(int, int) from sub class constructor. In above example you can use as below, sub(int y, int z) { super(y,z); c = y; … Read more
read the message of the error of the compiler! Implicit super constructor Base() is undefined. Must explicitly invoke another constructor your child class must call the constructor of the parent class Child(int b) { super(b); this.b = b; }
class Number : public string { public: Number() : string(“0”) { } Number(const string &str) : string(str) { } }; However, as long as you have the following 2 lines in the beginning, the name Number will be replaced by preprocessor. #ifndef Number #define Number You should use another macro name for the #include guard.
My guess is that the variable pete is declared as class Employee, which means that only methods of that class can be called on that variable. You must either declare pete as type Worker, or use a cast: ((Worker)pete).work(5);
Silly mistakes are there. Use below code compiles in VS2013 #include <vector> struct A : public std ::vector<A> { A(); virtual ~A(); };
Remove the getter and setter of your private campusName and rename your public campusName to CampusName. Add following code in your Campus class public override string ToString() { return CampusName() + “\n is located at ” + ShowAddress() + “\n it has ” + Departments(); } You should write a base School class public class … Read more
Why can’t I do this and then do : B classb = new B(1,2,3); classb.blah(4); You absolutely can. There’s no problem with that at all, other than the syntactic errors in your code. Here’s a complete example which compiles and runs with no issues. (I’ve fixed the naming convention violation at the same time for … Read more