Demonstrate front_insert_iterator in vector
#include <iostream> #include <iterator> #include <list> using namespace std; int main() { list<int> vectorObject, vectorObject2; list<int>::iterator itr; int i; for(i = 0; i <5; i++) vectorObject.push_back(i); cout << "Original contents of vectorObject: "; itr = vectorObject.begin(); while(itr != vectorObject.end()) cout << *itr++ << " "; cout << endl; front_insert_iterator<list<int> > frnt_i_itr(vectorObject); // create a front_insert_iterator to vectorObject *frnt_i_itr++ = 100; // insert rather than overwrite at front *frnt_i_itr = 200; cout << "vectorObject after insertion: "; itr = vectorObject.begin(); while(itr != vectorObject.end()) cout << *itr++ << " "; cout << endl; cout << "Size of vectorObject2 before copy: " << vectorObject2.size() << endl; copy(vectorObject.begin(), vectorObject.end(), front_inserter(vectorObject2)); cout << "Size of vectorObject2 after copy: " << vectorObject2.size() << endl; cout << "Contents of vectorObject2 after insertion: "; itr = vectorObject2.begin(); while(itr != vectorObject2.end()) cout << *itr++ << " "; return 0; }