#include <iostream>
 #include <string>

 std::string overloadTest(char*){
   return "char*";
 }

 std::string overloadTest(long int){
   return "long int";
 }

 int main(){

   std::cout << std::endl;

   long int* pi = nullptr;
   // long int i= nullptr;       // ERROR
   auto nullp= nullptr;          // type std::nullptr_t

   bool b = nullptr;
   std::cout << std::boolalpha << "b: "  << b << std::endl;
   auto val= 5;
   if ( nullptr < &val ){ std::cout << "nullptr < &val" << std::endl; }

   // calls char*
   std::cout << "overloadTest(nullptr)= " <<  overloadTest(nullptr)<< std::endl;

   std::cout << std::endl;

 }