• We will look at passing multiple template parameters in our template parameter list. Have a look at the code:

  	#include<iostream>
  	template<typename t1, typename t2>
  	void foo(t1 input1, t2 input2)
  	{
  	std::cout<<input1<<std::endl;
  	std::cout<<input2<<std::endl;
  
  	}
  	int main()
  	{
  	   foo<int, float>(3, 4.5f);
  	   return 0;
  	}
  

Output
3
4.5

We can copy this code in https://cppinsights.io/ and have a look at what kind of code compiler generates on our behalf if we use templates.

Following are insights from above webpage:

	#include<iostream>
	template<typename t1, typename t2>
void foo(t1 input1, t2 input2)
{
  (std::cout << input1) << std::endl;
  (std::cout << input2) << std::endl;
}

	
	/* First instantiated from: insights.cpp:12 */
	#ifdef INSIGHTS_USE_TEMPLATE
	template<>
	void foo<int, float>(int input1, float input2)
	{
	  std::cout.operator<<(input1).operator<<(std::endl);
	  std::cout.operator<<(input2).operator<<(std::endl);
	}
	#endif
	
	int main()
 {
   foo<int, float>(3, 4.5F);
   return 0;
 }

• To print the type names we can include <typeinfo>

  	#include<iostream>
  	#include<typeinfo>
  	template<typename t1, typename t2>
  	void foo(t1 input1, t2 input2)
  	{
  	std::cout<<typeid(input1).name()<<std::endl;
  	std::cout<<typeid(input2).name()<<std::endl;
  	}
  	int main()
  	{
  	   foo<int, float>(3, 4.5f);
  	   foo<float,int>(3.4f, 6); //this will create two instantiatons of templates.
  	   return 0;
  	}