Merge two lists.

  
#include <iostream>
#include <list>
using namespace std;
   
int main()
{
  list<int> lst1, lst2;
  int i;
   
  for(i=0; i<10; i+=2) lst1.push_back(i);
  for(i=1; i<11; i+=2) lst2.push_back(i);
   
  list<int>::iterator p = lst1.begin();
  while(p != lst1.end()) {
    cout << *p << endl;
    p++;
  }
   
  p = lst2.begin();
  while(p != lst2.end()) {
    cout << *p << endl;
    p++;
  }
   
  lst1.merge(lst2);
  if(lst2.empty())
    cout << "lst2 is now empty\n";
   
  cout << "Contents of lst1 after merge:\n";
  p = lst1.begin();
  while(p != lst1.end()) {
    cout << *p << " ";
    p++;
  }
   
  return 0;
}

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Merge two lists. : list « List « C++

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