#include <iostream>
#include <cstdlib>
#include <cstring>   //for strcmp
#include <cwchar>    //for wcscmp
#include "date.h"
using namespace std;

int min(int a, int b);   //function declaration
double min(double a, double b);
date min(date a, date b);
const char *min(const char *a, const char *b);
const wchar_t *min(const wchar_t *a, const wchar_t *b);

int main()
{
	date today;
	date tomorrow = today + 1;   //= operator+(today, 1);

	cout << ::min(10, 20) << "\n"                  //calls line 29
		<< ::min(3.14, 2.71) << "\n"               //calls line 34
		<< ::min(today, tomorrow) << "\n"          //calls line 39
		<< ::min("hello", "goodbye") << endl;      //calls line 44

	wcout << ::min(L"hello", L"goodbye") << L"\n"; //calls line 50

	return EXIT_SUCCESS;
}

int min(int a, int b)      //function definition
{
	return b < a ? b : a;      //why not return a < b ? a : b;
}

double min(double a, double b)
{
	return b < a ? b : a;
}

date min(date a, date b)   //should be passed and returned by reference
{
	return b < a ? b : a;      //return operator<(b, a) ? b : a;
}

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

const wchar_t *min(const wchar_t *a, const wchar_t *b)
{
	return wcscmp(b, a) < 0 ? b : a;   //wide character string compare
}