Constructors?

[Wynd]

How do you have and use more than one constructor for a class?

[parksie]

Just keep adding them:

class MyClass {
public:
    MyClass() { m_iVal = 5; }
    MyClass(int iVal) { m_iVal = iVal; }

protected:
    int m_iVal;
};

void main() {
    MyClass x; // x.m_iVal = 5
    MyClass y(32); // y.m_iVal = 32
}

[Wynd]

Ah, ok. I guess I am just used to Java classes. Anyway, thanks.

class MyClass {
public:
    MyClass() { m_iVal = 5; }
    MyClass(int iVal) { m_iVal = iVal; }

protected:
    int m_iVal;
};

void main() {
    MyClass x = new MyClass(); // x.m_iVal = 5
    MyClass y = new MyClass(32); // y.m_iVal = 32
}

[Dillinger4]

"Ah, ok. I guess I am just used to Java classes. Anyway, thanks."

It's the same thing in Java........

public class MyClass{
double x, y, width, height;

MyClass(double y, double x, double width, double height){
this.y = y;
this.x = x;
this.width = width;
this.height = height;
}

MyClass(int y, int x,){
this(x,y,10,10);
}

MyClass(){
this(1,1);
}
}

~~~ this is a special notation provided by java to enable you to
invoke a constructor of the same class from another constructor of that class. commonly refered to as a constructor call satatement.

[kedaman]

you don't need to overload the constructor if you don't pass different types or in different orders, you can use default values:

MyClass(int iVal=5) { m_iVal = iVal; };

and MyClass() would call MyClass(5)

[Dillinger4]

The purpose was just to show constructor chaining.
If i wanted to pass diffrent types i would just overload like
you pointed out.