Solution: Concatenate Strings

#include <iostream>
#include <string>
template<typename... Strings>
class strOps {
public:
    // Constructor to concatenate strings and calculate information
    strOps(const Strings&... strings): Concatenated(concatenate(strings...)),
        TotalStrings(Counts<sizeof...(strings)>), 
        TotalCharacters(count_characters(Concatenated)) 
    {}
    int get_count()
    {
        return TotalStrings;
    }
    int get_string_length()
    {
        return TotalCharacters;
    }
    std::string get_string()
    {
        return Concatenated;
    }
private:
    std::string Concatenated;
    int TotalStrings;
    int TotalCharacters;
    // Counts total strings using variadic variable template
    template<size_t... R>
    static constexpr size_t Counts = (R + ...);
    // Helper function to concatenate strings using fold expression
    template<typename... Args>
    std::string concatenate(const Args&... args) {
        return (args + ...);
    }
    // Helper function to count total characters in a string
    int count_characters(const std::string& str) {
        return str.length();
    }
};
// Variadic function template to display information
template<typename... Ts>
void display_info(Ts... ts) {
    ((std::cout << ts ), ...) << '\n';
}
int main() {
    strOps<std::string, std::string, std::string, std::string, std::string> 
         strConcatenator("Hello ", "world", " in C++", " template metaprogramming", "!");
    display_info("String: ", strConcatenator.get_string());
    display_info("Total characters: ", strConcatenator.get_string_length());
    display_info("Number of strings merged: ", strConcatenator.get_count());
    return 0;
}