Notes-7:variadic template

#include <iostream>using namespace std;template<typename T>void print_comma_separated_list(const T& value) {        std::cout<<value<<std::endl;}template<typename First,typename ... Rest>void print_comma_separated_list(const First& first,Rest ... rest) {        std::cout<<first<<",";        print_comma_separated_list(rest...);}int main(){    print_comma_separated_list(42,"hello",2.3,'a');    print_comma_separated_list("hello",2.3,'a');    print_comma_separated_list(2.3,'a');    print_comma_separated_list('a');    return 0;}

#include <stdexcept>#include <iostream>using namespace std; void mprintf(const char* s) {     while (*s) {         if (*s == '%' && *(++s) != '%')             throw std::runtime_error("invalid format string: missing arguments");         std::cout << *s++;     } }   template<typename T, typename... Args> void mprintf(const char* s, T value, Args... args) {     while (*s) {         if (*s == '%' && *(++s) != '%') {             std::cout << value;             mprintf(s, args...); // call even when *s == 0 to detect extra arguments             return;         }         std::cout << *s++;     }     throw std::logic_error("extra arguments provided to printf"); } int main(int argc, char** argv) {     std::string s("test");     std::string s2("test2");     mprintf("% - %", s, s2);     return 0; }