Use std::remove to delete all element in a vector by value : remove « STL Algorithms Modifying sequence operations « C++ Tutorial

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2. STL Algorithms Modifying sequence operations
3. remove

#include <iostream>
using std::cout;
using std::endl;

#include <algorithm>
#include <vector>
#include <iterator>

int main()
{
   int a[ 10 ] = { 10, 2, 10, 4, 16, 6, 14, 8, 12, 10 };

   std::ostream_iterator< int > output( cout, " " );

   std::vector< int > v( a, a + 10 ); // copy of a

   std::vector< int >::iterator newLastElement;

   cout << "Vector v before removing all 10s:\n   ";
   std::copy( v.begin(), v.end(), output );

   // remove all 10s from v
   newLastElement = std::remove( v.begin(), v.end(), 10 );
   cout << "\nVector v after removing all 10s:\n   ";
   std::copy( v.begin(), newLastElement, output );

   return 0;
}

Vector v before removing all 10s:
   10 2 10 4 16 6 14 8 12 10
Vector v after removing all 10s:
   2 4 16 6 14 8 12