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// Fig. 21.30: fig21_30.cpp
// Mathematical algorithms of the standard library.
#include <iostream>
using std::cout;
using std::endl;
#include <algorithm> // algorithm definitions
#include <numeric> // accumulate is defined here
#include <vector>
bool greater9( int );
void outputSquare( int );
int calculateCube( int );
int main()
{
const int SIZE = 10;
int a1[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
std::vector< int > v( a1, a1 + SIZE );
std::ostream_iterator< int > output( cout, " " );
cout << "Vector v before random_shuffle: ";
std::copy( v.begin(), v.end(), output );
// shuffle elements of v
std::random_shuffle( v.begin(), v.end() );
cout << "\nVector v after random_shuffle: ";
std::copy( v.begin(), v.end(), output );
int a2[] = { 100, 2, 8, 1, 50, 3, 8, 8, 9, 10 };
std::vector< int > v2( a2, a2 + SIZE );
cout << "\n\nVector v2 contains: ";
std::copy( v2.begin(), v2.end(), output );
// count number of elements in v2 with value 8
int result = std::count( v2.begin(), v2.end(), 8 );
std::cout << "\nNumber of elements matching 8: " << result;
// count number of elements in v2 that are greater than 9
result = std::count_if( v2.begin(), v2.end(), greater9 );
cout << "\nNumber of elements greater than 9: " << result;
// locate minimum element in v2
cout << "\n\nMinimum element in Vector v2 is: "
<< *( std::min_element( v2.begin(), v2.end() ) );
// locate maximum element in v2
cout << "\nMaximum element in Vector v2 is: "
<< *( std::max_element( v2.begin(), v2.end() ) );
// calculate sum of elements in v
cout << "\n\nThe total of the elements in Vector v is: "
<< std::accumulate( v.begin(), v.end(), 0 );
cout << "\n\nThe square of every integer in Vector v is:\n";
// output square of every element in v
std::for_each( v.begin(), v.end(), outputSquare );
std::vector< int > cubes( SIZE );
// calculate cube of each element in v;
// place results in cubes
std::transform(
v.begin(), v.end(), cubes.begin(), calculateCube );
cout << "\n\nThe cube of every integer in Vector v is:\n";
std::copy( cubes.begin(), cubes.end(), output );
cout << endl;
return 0;
} // end main
// determine whether argument is greater than 9
bool greater9( int value )
{
return value > 9;
} // end function greater9
// output square of argument
void outputSquare( int value )
{
cout << value * value << ' ';
} // end function outputSquare
// return cube of argument
int calculateCube( int value )
{
return value * value * value;
} // end function calculateCube
/**************************************************************************
* (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice *
* Hall. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have used their *
* best efforts in preparing the book. These efforts include the *
* development, research, and testing of the theories and programs *
* to determine their effectiveness. The authors and publisher make *
* no warranty of any kind, expressed or implied, with regard to these *
* programs or to the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for incidental or *
* consequential damages in connection with, or arising out of, the *
* furnishing, performance, or use of these programs. *
*************************************************************************/
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