Parameterized Constructor.

[bond5611]

How do I call the parameterized constructor in the below programm.

#include<iostream>
using namespace std;
class my{
      int a;
      public:
             my(){
                  a=8;
                  }
             my(int k){
                  a=k;
                  }     
             void print(){
                  cout<<"Num:"<<a<<endl;
                  }     
      };
int main(){

    my *myO;
    myO=new my[4];
    for(int i=0;i<4;i++){
            myO[i].print();
          }
    cout<<endl;
    system("pause");
    return 0;
}

if I write like this
myO=new my(2)[4];
this is considered an error.

[guestgulkan]

if I write like this
myO=new my(2)[4];
this is considered an error.

In c++03 - you couldn't do that (you could not specify a constructor when
creating an array using new - although you could do this myO=new my[4]();)

However, in C++11 - you can now do this (uniform initialization and initilalizer lists):
myO=new my[4]{2,6,3,101};

So read up on C++11 Uniform Initialization & initializer lists
(there's lots of info about on the web)

[bond5611]

is there some difference for using C++11, I mean what else i will need to do for using C++11?

[Peter87]

First you need a somewhat new compiler that supports the C++11 features you want to use. No compiler has full C++11 support yet. C++11 might not be enabled by default. For GCC you have to pass the flag -std=c++0x or -std=c++11 to the compiler.