reverse a string in C++

reverse.cpp

#include <string>
#include <iostream>

using namespace std; 

void reverse(string s)
{
	cout << "input = " << s << endl; 
	cout << "size = " << s.length() << endl; 

	for (int i = s.length()-1; i>=0; i--) cout << s[i]; 
	cout << endl; 
}

int main(int argc, char **argv)
{
	string s; 

	cout << "Please enter the string to be reversed:" << endl; 
	getline(cin, s);   
	reverse(s);

	// or we can just pass the string from the command line:
	// cout << argv[1] << endl; 
	// reverse(argv[1]); 
	return (0); 
}