#include <iostream>
#include <cstdlib>
#include <cstring>   //for the strcmp function
#include "date.h"    //for class date
using namespace std;

//Function declarations:
int min(int a, int b);
double min(double a, double b);
const date& min(const date& a, const date& b);
const char *min(const char *a, const char *b);

int main()
{
	date today;            //no-argument constructor constructs today's date
	date tomorrow {today + 1};   //operator+(today, 1);

	cout << ::min(10, 20) << "\n"  
		<< ::min(3.14, 2.71) << "\n"  
		<< ::min(today, tomorrow) << "\n"
		<< ::min("hello", "goodbye") << "\n"; 

	return EXIT_SUCCESS;
}

int min(int a, int b)      //function definition
{
	if (b < a) {
		return b;
	} else {
		return a;
	}
}

double min(double a, double b)
{
	if (b < a) {
		return b;
	} else {
		return a;
	}
}

const date& min(const date& a, const date& b) //pass-by-reference avoids copying
{
	if (b < a) {
		return b;
	} else {
		return a;
	}
}

const char *min(const char *a, const char *b)
{
	if (strcmp(b, a) < 0) { //if (b < a) { would be wrong for this data type
	       return b;
	} else {
	       return a;
	}
}