std::vector<bool>

#include <cassert>
#include <initializer_list>
#include <iostream>
#include <vector>
 
void println(auto rem, const std::vector <bool>& vb)
{
 std::cout << rem << " = [";
 for (std::size_t t{}; t != vb.size(); ++t)
 std::cout << (t ? ", " : "") << vb[t];
 std::cout << "]\n";
}
 
int main()
{
 std::vector <bool> v1; // creates an empty vector of boolean values
 println("1) v1", v1);
 
 std::vector <bool> v2{0, 1, 1, 0, 1}; // creates filled vector
 println("2) v2", v2);
 
 v1 = v2; // copies v2 to v1
 println("3) v1", v1);
 
 assert (v1.size() == v2.size()); // checks that v1 and v2 sizes are equal
 assert (v1.front() == false); // accesses first element, equivalent to:
 assert (v1[0] == false);
 assert (v1.back() == true); // accesses last element, equivalent to:
 assert (v1[v1.size() - 1] == true);
 
 v1 = {true, true, false, false}; // assigns an initializer list
 println("4) v1", v1);
 
 v1.push_back(true); // adds one element to the end
 println("5) v1", v1);
 
 v1.pop_back(); // removes one element from the end
 println("6) v1", v1);
 
 v1.flip(); // flips all elements
 println("7) v1", v1);
 
 v1.resize(8, true); // resizes v1; new elements are set to "true"
 println("8) v1", v1);
 
 v1.clear(); // erases v1
 assert (v1.empty()); // checks that v1 is empty
}

1) v1 = []
2) v2 = [0, 1, 1, 0, 1]
3) v1 = [0, 1, 1, 0, 1]
4) v1 = [1, 1, 0, 0]
5) v1 = [1, 1, 0, 0, 1]
6) v1 = [1, 1, 0, 0]
7) v1 = [0, 0, 1, 1]
8) v1 = [0, 0, 1, 1, 1, 1, 1, 1]