argv example

gistfile1.cpp

// if we had the program
int main(int argc, char* argv[]) {
  cout << "output is: ";
  for(int i = 0; i < argc; i++) 
    cout << argv[i] << ", ";

  cout << endl;
  return 0;
}

// Given this input
$ ./a.out a b c
output is: a.out, a, b, c,

$ ./a.out -f somefile
output is: a.out, -f, somefile