boost::algorithm::one_of_equal() in C++ library Last Updated : 30 May, 2019 Comments Improve Suggest changes Like Article Like Report The one_of_equal() function in C++ boost library is found under the header 'boost/algorithm/cxx11/one_of.hpp' which tests if exactly one of the elements of a sequence against the value passed is same. It takes a sequence and a value, and returns true if the exactly one of the elements are same in the sequence to the value passed. Syntax: bool one_of_equal ( InputIterator first, InputIterator last, const &value) or bool one_of_equal ( const Range &R, const &value) Parameters: The function accepts parameters as described below: first: It specifies the input iterators to the initial positions in a sequence. second: It specifies the input iterators to the final positions in a sequence. value: It specifies a value which is to be checked against for one the elements of the sequence. R: It is the complete sequence. Return Value: The function returns true if exactly one of the elements of the sequence is equal to value, else it returns false. Below is the implementation of the above approach: Program-1: CPP // C++ program to implement the // above mentioned function #include <bits/stdc++.h> #include <boost/algorithm/cxx11/one_of.hpp> using namespace std; // Drivers code int main() { // Declares the sequence with int c[] = { 1, 2, 3 }; // Run the function bool ans = boost::algorithm::one_of_equal(c, 1); // Condition to check if (ans == 1) cout << "exactly one element is 1"; else cout << "exactly one element is not 1"; return 0; } Output: exactly one element is 1 Program-2: CPP // C++ program to implement the // above mentioned function #include <bits/stdc++.h> #include <boost/algorithm/cxx11/one_of.hpp> using namespace std; // Drivers code int main() { // Declares the sequence int a[] = { 1, 2, 3, 6 }; // Run the function bool ans = boost::algorithm::one_of_equal(a, a + 4, 4); // Condition to check if (ans == 1) cout << "exactly one element is 4"; else cout << "exactly one element is not 4"; return 0; } Output: exactly one element is not 4 Reference: https://www.boost.org/doc/libs/1_70_0/libs/algorithm/doc/html/the_boost_algorithm_library/CXX11/one_of.html Comment More infoAdvertise with us Next Article boost::algorithm::one_of_equal() in C++ library G gopaldave Follow Improve Article Tags : C++ CPP-Functions cpp-boost Practice Tags : CPP Similar Reads boost::algorithm::none_of_equal() in C++ library The none_of_equal() function in C++ boost library is found under the header 'boost/algorithm/cxx11/none_of.hpp' which tests all the elements of a sequence against the value passed in the parameter and returns true if all the elements of the sequence are not equal to the value passed. It takes a sequ 2 min read boost::algorithm::one_of() in C++ library The one_of() function in C++ boost library is found under the header 'boost/algorithm/cxx11/one_of.hpp' which tests the elements of a sequence and returns true if exactly one of the element share the property given. It takes a sequence and a predicate, and returns true if the predicate returns true 2 min read boost::algorithm::equal() in C++ library The equal() function in C++ boost library is found under the header 'boost/algorithm/cxx11/equal.hpp' tests to see if two sequences contain equal values. It returns a boolean value which determines if both the sequences are same or not. Syntax: bool equal ( InputIterator1 first1, InputIterator1 seco 2 min read boost::algorithm::any_of_equal() in C++ library The any_of_equal() function in C++ boost library is found under the header 'boost/algorithm/cxx11/any_of.hpp' which tests if any of the elements of a sequence against the value passed is same. It takes a sequence and a value, and returns true if the any of the elements are same in the sequence to th 2 min read boost::algorithm::all_of_equal() in C++ library The all_of_equal() function in C++ boost library is found under the header 'boost/algorithm/cxx11/all_of.hpp' which tests all the elements of a sequence against the value passed in the parameter and returns true if all the elements of the sequence are same. It takes a sequence and a value, and retur 2 min read Like