Reading operands

How do you read the string typed after the command in the terminal? For example, to open the page "http://cboard.cprogramming.com/", you could type into the terminal:

$ firefox http://cboard.cprogramming.com/

In standard sequential C, how do you get the program to read the operand?

Code:

---

#include <stdio.h>
int main(int argc, char *argv[])
{
    if (argc > 1)
    {
        const char *firstArgument = argv[1];
        printf("First argument: %s\n", firstArgument);
    }
    return 0;
}

---

Thank you very much, I thought it would be something like that, but I was not sure.