#include <iostream>
#include <cstdlib>
using namespace std;

// ----------------------------------------------
// main function
// ----------------------------------------------
int main(int argc, char *argv[]) {

	// check that program as at least three arguments
	if (argc <= 3) {
		cerr << "the program needs at least 3 arguments" << endl;
		cerr << argv[0] << " method alpha message" << endl; 
		exit(EXIT_FAILURE);
	}
	
	cout << "program's name = " << argv[0] << endl;
	for (int i=1; i<argc; ++i) {
		cout << "argument " << i << " = " << argv[i] << endl;
	}
	
	
	// first argument should be an integer
	int method = 1;
	if (argc > 1) {
		// convert into integer
		method = atoi(argv[1]);
		cout << "method = " << method << endl;
	}
	
	// second argument should be a float
	float alpha = 0.2;
	if (argc > 2) {
		// convert into float
		alpha = atof(argv[2]);
		cout << "alpha = " << alpha << endl;
	}
	
	// second argument should be a string
	char *message = NULL;
	if (argc > 3) {
		message = argv[3];
		cout << "message = " << message << endl;
	}
	
	
	return EXIT_SUCCESS;	
}