What is dynamic initialization of object in c++?

Question

What is dynamic initialization of objects in c++?

Please explain with an simple example...

Answer 1

Dynamic initialization means the first value assigned to the variable after memory allocation is not known at compile time, it is evaluated only at run time. for example

#include 

using namespace std;

int sample()
{
    int x;
    cin >> x;
    return x;
}

const int t = sample(); //dynamic initialization

int p = sample();       //dynamic initialization

void main()

{

    cout << t;

    cout << p;

} 

As we know that a constant can get value only once i.e. at the time of initialization. this example shows that even a global variable which is static storage if dynamically initialize by return value of a function, the first value assigned to the variable is the value returned by function, which replaces the initial default value 0 of the variable which is assigned at the time of memory allocation.