Question

I need to initialize an array of objects of a parametrized constructor . How can i do it in best possible way ?

   # include<iostream>
   # include<conio.h>
   # include<stdio.h>

   using namespace std;

   class A
   {
    public:
    int a;       
    A();
    A(int x)
    {
     a=x;
    }      
   };
   int main()
   {
    A *a1,a2(1);
    a1 = (A*)malloc(sizeof(A)*10); // equivalent to A[10]. 
    for(int i=0;i<10;i++) a1[i]=a2; // Initialization is important in any program.
    for(int i=0;i<10;i++) cout<<a1[i].a; 
    getch(); 
    return 0;   
   }

This does work but is there some other way better than this ?

Answer 1

The C++ way would be to use a std::vector.

std::vector<A>   a1(10, 1);

creates 10 A‘s initialized by 1.