program to demonstrate the function template In C++

program to demonstrate the function template 

#include <iostream.h>

/*

Function

templates are a way of defining a whole
family of functions which are

essentially the
same except that they work on different

types

*/

// Define the

template

template<typename T>
void swap(T& x, T&

y)
{
T tmp = x;
x = y;
y = tmp;
}

// Write

some code to make use of the template

int main () {

int x =

6;
int y = 12;

char *left = "To the West";
char *right = "To the

East";

swap(x,y);
swap(left,right);

cout << "x is now "

<< x << endl;
cout << "y is now " << y <<

endl;

cout << "left is now " << left << endl;
cout

<< "right is now " << right << endl;
}