The powerful part of list is "the efficient insertion and deletion".  (Think about array and vector)

The insert and erase member functions of class list:

• void erase(iterator pos);

Erase the element pointed to by pos.
• void erase(iterator first, iterator last);

Erase all list elements within the iterator range[first, last).
• iteraror insert(iterator pos, const T& value);

Insert value before pos, and return an iterator pointing to the position of the new value in the list.
The operator does not affect any existing iterators.

using namespace std;

void main()
{
 int arr[5] ={2, 7, 3, 9, 5};
 list<int> LIST1(arr, arr+5);
 list<int>::iterator iter, newElt;
 iter = LIST1.begin();

 while( iter != LIST1.end())
 {
  cout<<*iter<<" ";
  iter++;
 }
 cout<<endl;

 iter = LIST1.begin();
 iter++;
 newElt = LIST1.insert(iter, 4);
 cout<<"content of newElt point to = "<<*newElt<<endl;
 cout<<"content of iter point to = " <<*iter<<endl;

 iter = LIST1.begin();
 while( iter != LIST1.end())
 {
  cout<<*iter<<" ";
  iter++;
 }
 cout<<endl;
}

using namespace std;

void main()
{
 int arr[5] ={2, 7, 3, 9, 5};
 list<int> LIST1(arr, arr+5);
 list<int>::iterator iter, newElt;
 iter = LIST1.begin();

 while( iter != LIST1.end())
 {
  cout<<*iter<<" ";
  iter++;
 }
 cout<<endl;

 iter = LIST1.begin();
 iter++;
 LIST1.erase(iter);

 iter = LIST1.begin();
 while( iter != LIST1.end())
 {
  cout<<*iter<<" ";
  iter++;
 }
 cout<<endl;
}

using namespace std;

void main()
{
 int arr[5] ={2, 7, 3, 9, 5};
 list<int> LIST1(arr, arr+5);
 list<int>::iterator iter, newElt;
 iter = LIST1.begin();

 while( iter != LIST1.end())
 {
  cout<<*iter<<" ";
  iter++;
 }
 cout<<endl;

 iter = LIST1.begin();
 iter++;
 LIST1.erase(iter++);
 cout<<"content of iter point to = " <<*iter<<endl;

 iter = LIST1.begin();
 while( iter != LIST1.end())
 {
  cout<<*iter<<" ";
  iter++;
 }
 cout<<endl;
}

using namespace std;

void main()
{
 int arr[5] ={2, 7, 3, 9, 5};
 list<int> LIST1(arr, arr+5);
 list<int>::iterator iter, newElt;
 iter = LIST1.begin();

 while( iter != LIST1.end())
 {
  cout<<*iter<<" ";
  iter++;
 }
 cout<<endl;

 LIST1.erase(LIST1.begin(), LIST1.end());
 cout<<"The number of elements after erased in LIST1 is "
     <<LIST1.size()<<endl;
}