About C + + constructors

If you have more than one default constructor, say:

Class Myclass{public:myclass () {}; MyClass (int a = 0, int b = 0,int c=0) {A_ = A;cout << "Constructor 1" << Endl;} MyClass (int A, int b) {A_ = A;b_ = B;cout << "Constructor 2" << Endl;} ~myclass () {};p rivate:int a_;int b_;int c_;};

If you have a constructor that has no arguments:

MyClass () {}

Then the declaration object calls the constructor without arguments, such as:

MyClass class ();

The call is:

MyClass () {};

If you write three parameters when declaring an object, such as:

MyClass Class1 (a);

Then the call is:

MyClass (int a = 0, int b = 0,int c=0)

If there is no default constructor with no arguments, the call is in the case without arguments:

MyClass (int a = 0, int b = 0,int c=0)

When all three parameters have default values, they are not called at any time (with limited levels and no discovery of the invocation):

MyClass (int A, int b)

To construct the object.

About C + + constructors