#include <algorithm>
  #include <algorithm>
  void fill( iterator start, iterator end, const TYPE& val );

The function fill() assigns val to all of the elements between start and end.

For example, the following code uses fill() to set all of the elements of a vector of integers to -1:

 vector<int> v1;
 for( int i = 0; i < 10; i++ ) {
   v1.push_back( i );
 }              

 cout << "Before, v1 is: ";
 for( unsigned int i = 0; i < v1.size(); i++ ) {
   cout << v1[i] << " ";
 }
 cout << endl;            

 fill( v1.begin(), v1.end(), -1 );              

 cout << "After, v1 is: ";
 for( unsigned int i = 0; i < v1.size(); i++ ) {
   cout << v1[i] << " ";
 }
 cout << endl;            

When run, the above code displays:

 Before, v1 is: 0 1 2 3 4 5 6 7 8 9
 After, v1 is: -1 -1 -1 -1 -1 -1 -1 -1 -1 -1