Functino Templates - Example - Convert a string to a number

#include <iostream>
#include <string>
#include <sstream>
using namespace std;

template <typename T> void to_number(const string& S, T& number)
{
	istringstream sin(S);
	sin >> number;
}

int main()
{
	string one("1");
	string pi("3.14");
	string unsigned_guy("5");
	string floater("2.7");
	string shortie("7");
	string ll("1234567890123456789012345678901");
	string longdouble("3.14159265358979323846");

	int One;
	double Pi;
	unsigned int Unsigned_guy;
	float Floater;
	short Shortie;
	long long LL;
	long double LongDouble;


	to_number(one,One);
	to_number(pi,Pi);
	to_number(unsigned_guy,Unsigned_guy);
	to_number(floater,Floater);
	to_number(shortie,Shortie);
	to_number(ll,LL);
	to_number(longdouble,LongDouble);

	cout << One << ' ' << Pi << ' ' << Unsigned_guy << ' ' << Floater << ' ' << Shortie << endl;
	cout << ll << ' ' << longdouble << endl;
	return 0;
}

1 3.14 5 2.7 7
1234567890123456789012345678901 3.14159265358979323846