// Example of passing numeric parameters through command line.   v. 10/9/02

// Assumes numeric input.
// Reports error if too few args passed.
// Echos argv values.

#include <iostream>  // for cerr and cout.
#include <string>    // for atof which converts char arrays to floats.

using namespace std;

int main( int argc, char *argv[] )
{
  // Make sure have at least 1 parameter; a floating point precision
  if ( argc <= 1 )
    {
      cerr <<  "INVALID USAGE" << endl;
      cerr <<  "Usage:  prog3 [precision percent]" << endl;
      return 1;
    }

  float precision = atof(argv[1]);
  cout << "argv[0]: '" << argv[0] << "'" << endl;
  cout << "argv[1]: '" << argv[1] << "'" << endl;

  cout << "Specified precision: " << precision << endl;
}