If I have a class, MyClass, can I declare an array of MyClass on the heap, within the constructor of MyClass?
I can do this in C# but it doesnt seem to like it in C++?
I also get an error about no appropriate constructor for type MyClass??
class MyClass
{
public:
MyClass(int);
private
MyClass* array;
};
MyClass::MyClass(int size){
array = new MyClass[size];
}
In order to have an array of something, said something has to be default-constructible. Your MyClass isn't since it needs an int to be constructed.
What C# does is comparable to:
MyClass** array = new MyClass*[size];
Where pointers are default constructible, so its allowed. Basically, whenever you do SomeObject in C# its the equivalent of SomeObject* in C++. Except that the code would be horribly inefficient, even worse than its C# counterpart, and there would be leaks everywhere.
MyClass not to be default-constructible?
You have a more fundamental problem with your approach here than how to construct an array.
Think about it this way:
class A
{
A* a;
public:
A();
};
A::A()
{
a = new A();
}
What happens? You try and create an A; within the constructor, a new A is created. Within that constructor, another new A is created...
Boom, out of memory.
