C++ program with args (eg myprogram.exe -n)

[MikeCW]

I have tried to learn about this but still don't understand it.
Lets say I want a program that writes a message to a file:

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

int main()
{
string message[3] = {"a", "b", "c"};
ofstream f;
f.open("C:\file.txt");
f >> message[0];
f.close()
}

How would I rewrite the obove program so I could use a script that says:
myprogram.exe 0 //creates file with "a"
myprogram.exe 2 //creates file with "c"
myprogram.exe 1 //creates file with "b"

Thanks.
-Mike

[Duthomhas]

http://www.cprogramming.com/tutorial/lesson14.html

[MikeCW]

Thankyou just what I needed.