9.1.4.1 Template functions

#include "stdafx.h"
#include <iostream>
#include <string>
#include <sstream>

using namespace std;

template<class T>
int sigma(T data)
{
	if (data == 0)
	{
		return 0;
	}
	else if (data > 0)
	{
		return 1;
	}
	else return -1;
}
template<class T>
string tostr(T data)
{
	return to_string(data);
}
int main() {
	int valuei;
	double valued;
	cin >> valuei;
	cin >> valued;
	cout << sigma(valuei) << endl;
	cout << sigma(valued) << endl;
	cout << tostr(valuei) << endl;
	cout << tostr(valued) << endl;
	system("pause");
	return 0;
}