Number of elements greater than 9: count_if and greater() : random_shuffle « STL Algorithms Modifying sequence operations « C++ Tutorial

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C++ Tutorial » STL Algorithms Modifying sequence operations » random_shuffle

24.7.7.Number of elements greater than 9: count_if and greater()

#include <iostream>

#include <algorithm>

#include <numeric>

#include <vector>



using namespace std;



bool greater9( int );



int main()

{

   const int SIZE = 10;

   int a1[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

   vector< int > v( a1, a1 + SIZE );



   random_shuffle( v.begin(), v.end() );



   int a2[] = { 100, 2, 8, 1, 50, 3, 8, 8, 9, 10 };

   vector< int > v2( a2, a2 + SIZE );

 

   int result = count_if( v2.begin(), v2.end(), greater9 );

   cout << "\nNumber of elements greater than 9: " << result;



   return 0;

}



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

24.7.random_shuffle
	24.7.1.	std::random_shuffle a vector
	24.7.2.	Use back_insert_iterator to insert element into a vector
	24.7.3.	Use random_shuffle to shuffle all elements randomly
	24.7.4.	Use random_shuffle to shuffle elements with self-written random number generator
	24.7.5.	Shuffle a sequence with random_shuffle()
	24.7.6.	shuffle the container with random_shuffle
	24.7.7.	Number of elements greater than 9: count_if and greater()

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