Classes question.

Question

Why this code does not compiles?

#include <iostream>
using namespace std;

class MyClass
{
public:
MyClass();
void myPrint();
};

MyClass::MyClass() {
cout << " World";
}
void MyClass::myPrint() {
cout <<"Hello"<<endl;
}

int main() {
MyClass obj;
MyClass obj2;
obj.myPrint();
obj2.MyClass();
}

I didnt get what is MyClass() f. in class MyClass?
Then what it is?

Answer 1

MyClass() is the constructor of MyClass and is called automatically once you create a MyClass object (MyClass obj; MyClass obj2; both call MyClass() ). It's not possible to call the constructor again, so the problem is "obj2.MyClass();"

Answer 2

I'm not quite sure what you mean. Can you show me the code that doesn't work?

Answer 3

You define MyClass() in the public section in class MyClass, the compiler will search your code outside the class until it finds the MyClass::MyClass() function, doesn't matter where it is as long as it's after the class definition. Of course you could also just define MyClass() inside class MyClass.

Answer 4

Its just a code from lesson. This code back there is to represent that function defenition type must be the same outside, as in class. Its all about void myPrint().
But I don't get why myPrint() works, and when I pasted the same code in empty ::MyClass() f and called it - it doesnt work.
Wrong call or what. Or MyClass is an un touchable "monumant"?

Answer 5

Robobrain. Just put under comments create and call of obj2. It works. But MyClass does not. Where to define it to make it work. Im about code in question.

Answer 6

Oh. Damn. I got it. First answere was best, I just forgot some about constroctor.