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#include <algorithm>
#include <string>
#include <iostream>
using namespace std;
bool contains_a(string const &str)
{
return str.find('a') != string::npos;
}
int main()
{
string sarr[] =
{ "Alpha", "Bravo", "Charley", "Delta", "Echo" };
auto past = end(sarr); // see the next section
cout << "All elements contain 'a': " <<
all_of(sarr, past, contains_a) << "\n"
"At least one element contains 'a': " <<
any_of(sarr, past, contains_a) << "\n"
"None of the elements contains 'a': " <<
none_of(sarr, past, contains_a) << '\n';
}
// Displays:
// All elements contain 'a': 0
// At least one element contains 'a': 1
// None of the elements contains 'a': 0
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