// https://godbolt.org/z/P7zbrh71d
#include <vector>
#include <string>
#include <iostream>
#include <string_view>
using std::string; using std::string_view; using std::vector; using std::cout;
int get_len(string_view str) { return str.size(); } // string_view as parameter
int main() {
string s1 = "Hello"; // simply with string literal
string s2{'H','e','l','l','o'}; // or with list of char
using namespace std::literals; // for ""s-suffix and ""sv-suffix
auto s3 = "Hello"s; // even simpler with real string literal
vector<char> v1{"Hello"}; // (ERR) no vector with string literal
vector<char> v2{'H','e','l','l','o'}; // list of char is okay
cout << s1 << s2 << s3 << '\n'; // Output of string works
cout << v1 << v2 << '\n'; // (ERR) vector has no output
const auto str = "String"s; // Stringliteral
const auto strv = "String-View"sv; // String-View literal
cout << "Length of 'str' is " << get_len(str) << '\n'; // Output: … 6
cout << "Length of 'strv' is " << get_len(strv) << '\n'; // Output: … 11
}