#include <iostream>

using namespace std;

//Creates a template for the ability to work with vars of any type
template <class T>

//sum function
T sum(T a, T b)
{
	try {
		if (typeid(a).name() == "String" || typeid(b).name() == "String") {
			throw 1;
		}


	}
	catch (...) {
		cout << "Error #1: Can't use a string as a variable. ";
	}
	return a + b;
}

template <class T>

//Getting input of any type here:
T input(string type) {

	switch (type) {
	case float:
		cin >> float a;
		return a;
		break;

	case char:
		cin >> char a;
		return a;
		break;
	default:
		cout << "variable not specified." << endl;
		cin >> int a;
	}
}

//main function
int main()
{

	float a = input("float");
	float b = input("float");

	auto result = sum(a, b);
;

	cout << result <<endl;
	cout << "Press to exit" << endl;
	cin >> b;

    return 0;
}