std::replace_copy_if with predicate : replace_copy_if « STL Algorithms Modifying sequence operations « C++ Tutorial

1. C++ Tutorial
2. STL Algorithms Modifying sequence operations
3. replace_copy_if

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

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

bool greater9( int );

int main()
{
   int a[ 10 ] = { 10, 2, 10, 4, 16, 6, 14, 8, 12, 10 };
   std::ostream_iterator< int > output( cout, " " );

   std::vector< int > v4( a, a + 10 ); // copy of a
   std::vector< int > c2( 10 ); // instantiate vector c2
   cout << "Vector v4 before replacing all values greater than 9 and copying:\n;
   std::copy( v4.begin(), v4.end(), output );

   // copy v4 to c2, replacing elements greater than 9 with 100
   std::replace_copy_if(v4.begin(), v4.end(), c2.begin(), greater9, 100 );
   cout << "\nVector c2 after replacing all values greater than 9 in v4:\n   ";

   std::copy( c2.begin(), c2.end(), output );

   cout << endl;
   return 0;
}

bool greater9( int x )
{
   return x > 9;
}

Vector v4 before replacing all values greater than 9 and copying:
10 2 10 4 16 6 14 8 12 10
Vector c2 after replacing all values greater than 9 in v4:
   100 2 100 4 100 6 100 8 100 100