I'm trying to create a simple date class, but I get an error on my main file that says, "call of overloaded Date() is ambiguous." I'm not sure why since I thought as long as I had different parameters for my constructor, I was ok. Here is my code:

header file:

#ifndef DATE_H
#define DATE_H
using std::string;

class Date
{
public:
    static const int monthsPerYear = 12; // num of months in a yr
    Date(int = 1, int = 1, int = 1900); // default constructor
    Date(); // uses system time to create object
    void print() const; // print date in month/day/year format
    ~Date(); // provided to confirm destruction order
    string getMonth(int month) const; // gets month in text format
private:
    int month; // 1 - 12
    int day; // 1 - 31 
    int year; // any year

    int checkDay(int) const;
};

#endif

.cpp file

#include <iostream>
#include <iomanip>
#include <string>
#include <ctime>
#include "Date.h"
using namespace std;

Date::Date()
{
    time_t seconds = time(NULL);
    struct tm* t = localtime(&seconds);
    month = t->tm_mon;
    day = t->tm_mday;
    year = t->tm_year;
}

Date::Date(int mn, int dy, int yr)
{
    if (mn > 0 && mn <= monthsPerYear)
        month = mn;
    else
    {
        month = 1; // invalid month set to 1
        cout << "Invalid month (" << mn << ") set to 1.\n";
    }

    year = yr; // could validate yr
    day  = checkDay(dy); // validate the day

    // output Date object to show when its constructor is called
    cout << "Date object constructor for date ";
    print();
    cout << endl;
}

void Date::print() const
{
    string str;
    cout << month << '/' << day << '/' << year << '\n';

    // new code for HW2
    cout << setfill('0') << setw(3) << day;  // prints in ddd
    cout << " " << year << '\n';             // yyyy format

    str = getMonth(month);

    // prints in month (full word), day, year
    cout << str << " " << day << ", " << year << '\n';
}

and my main.cpp

#include <iostream>
#include "Date.h"
using std::cout;

int main()
{
    Date date1(4, 30, 1980);
    date1.print();
    cout << '\n';

    Date date2;
    date2.print();


}