1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
|
// Range v3 library
//
// Copyright Jeff Garland 2017
//
// Use, modification and distribution is subject to the
// Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// Project home: https://github.com/ericniebler/range-v3
//
///[count]
// This example demonstrates counting the number of
// elements that match a given value.
// output...
// vector: 2
// array: 2
#include <iostream>
#include <range/v3/algorithm/count.hpp> // specific includes
#include <vector>
using std::cout;
int
main()
{
std::vector<int> v{6, 2, 3, 4, 5, 6};
// note the count return is a numeric type
// like int or long -- auto below make sure
// it matches the implementation
auto c = ranges::count(v, 6);
cout << "vector: " << c << '\n';
std::array<int, 6> a{6, 2, 3, 4, 5, 6};
c = ranges::count(a, 6);
cout << "array: " << c << '\n';
}
///[count]
|