Thread: C++: working with overloaded constructors

I need help making my program like the requirement I need, including asking the user the prompt.
What is a testing program? How does overloaded constructors work?
Requirements
1. 3 files: Date.h, Date.cpp -> class implementation, main.cpp -> testing program.

Create a Date class with the following capabilities:
a) Output the date in multiple formats such as
MM/DD/YYYY
June 14, 1992


b) Use overloaded constructors to create Date objects initialized with dates of the formats in part a).

You should only have 3 member data: integer month, integer day, and integer year. Also, you should have at least 2 constructors and 2 functions in your Date.cpp.

Code:

Date::Date ( int mm, int dd, int yy )
{   // check mm, dd, and yy and save them into month, day, and year member data.
     …
}
 
Date::Date ( string mstr, int dd, int yy )
{   // check and convert mstr, dd, and yy and save them 
    //       into month, day, and year member data.
     …
}
 
void Date::print ( )
{   //  print the date in MM/DD/YYYY
     …
}
 
void Date::printFullDate ( )
{   //  print the date in long date such as
    //                June 24, 2002
     …
}

You also need to create 3 get functions and 3 set functions for the member data.

Sample Run:
3 choices for the user to pick:
Enter 1 for format: mm/dd/yyyy
Enter 2 for format: month dd, yyyy
Enter 3 to exit:

Choice: 1 //user input

//user inputs the information
Enter month (1-12): 1
Enter day of month: 5
Enter year: 2005

Mm/dd/yyyy: 1/5/2005 //gets checked for valid date.
//////////////
Enter 1 for format: mm/dd/yyyy
Enter 2 for format: month dd, yyyy
Enter 3 to exit:

Choice:2
Enter month name: May
Enter day of month: 10
Enter year:2010
Month dd, yyyy: May 10, 2010

Enter 1 for format: mm/dd/yyyy
Enter 2 for format: month dd, yyyy
Enter 3 to exit:

Choice:3
///////////////
Date.h

Code:

#ifndef DateFormat
#define DateFormat
#include <time.h>
#include <string.h>

class Date {
 public:
 Date();
 Date( int, int );
 Date( int, int, int );
 Date( char *, int, int );
 void setMonth( int );
 void setDay( int );
 void setYear( int );
 void printDateSlash( void ) const;
 void printDateMonth( void ) const;
 void printDateDay( void ) const;
 const char *monthName( void ) const;
 int leapYear( void ) const;
 int daysOfMonth( void ) const;
 void convert1( int );
 int convert2( void ) const;
 void convert3( const char * const );
 const char *monthList( int ) const;
 int days( int ) const;

 private:
 int day;
 int month;
 int year;
 };

 #endif

Date.cpp

Code:

#include <iostream.h>
#include <string.h>
#include <time.h>
#include "Date.h"


Date::Date()
{
            struct tm *ptr; 
            time_t t = time( 0 ); 
            ptr = localtime( &t ); 
            day = ptr->tm_mday; 
            month = 1 + ptr->tm_mon;
            year = ptr->tm_year + 1900; 
}


Date::Date( int ddd, int yyyy )

{
 setYear( yyyy );
 convert1( ddd ); 
}


Date::Date( int mm, int dd, int yy )
{
setYear( yy + 1900 );
setMonth( mm );
setDay( dd );
}


Date::Date( char *mPtr, int dd, int yyyy )
{
setYear( yyyy );
convert3( mPtr );
setDay( dd );
}


void Date::setDay( int d )
{ day = d >= 1 && d <= daysOfMonth() ? d : 1; }


void Date::setMonth( int m ) { month = m >= 1 && m <= 12 ? m : 1; }


void Date::setYear( int y ) { year = y >= 1900 && y <= 1999 ? y : 1900; }


void Date::printDateSlash( void ) const
{ cout << month << '/' << day << '/' << year << '\n'; }


void Date::printDateMonth( void ) const
{ cout << monthName() << ' ' << day << ", " << year << '\n'; }


void Date::printDateDay( void ) const
{ cout << convert2() << ' ' << year << '\n'; }


const char *Date::monthName( void ) const { return monthList( month - 1 ); }


int Date::daysOfMonth( void ) const
{ return leapYear() && month == 2 ? 29 : days( month ); }


int Date::leapYear( void ) const
{
    if ( year % 400 == 0 || ( year % 4 == 0 && year % 100 != 0 ) )
    return 1;
    else
    return 0;
}


void Date::convert1( int ddd ) 
{
int dayTotal = 0;

 if ( ddd < 1 || ddd > 366 ) 
 ddd = 1;
 setMonth( 1 );

           for ( int m = 1; m < 13 && ( dayTotal + daysOfMonth() ) < ddd; ++m ) {
           dayTotal += daysOfMonth();
           setMonth( m + 1 );
}

 setDay( ddd - dayTotal );
 setMonth( m );
}

int Date::convert2( void ) const
{
    int ddd = 0;

    for ( int m = 1; m < month; ++m )
    ddd += days( m );

    ddd += day;
    return ddd;
}


void Date::convert3( const char * const mPtr ) 
{
  int flag = 0;

   for ( int subscript = 0; subscript < 12; ++subscript )
   if ( !strcmp( mPtr, monthList( subscript ) ) ) {
   setMonth( subscript + 1 );
   flag = 1; 
   break; 
}

   if ( !flag )
   setMonth( 1 ); 
}


const char *Date::monthList( int mm ) const
{
 char *months[] = { "January", "February", "March", "April", "May",
 "June", "July", "August", "September", "October",
 "November", "December" };

return months[ mm ];
}


int Date::days( int m ) const


{
const int monthDays[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

return monthDays[ m - 1 ];
}

main.cpp

Code:

int main()
{
 Date d1( 7, 4, 98 ), d2( 86, 1999 ),
 d3, d4( "September", 1, 1998 );

 d1.printDateSlash(); 
 d2.printDateSlash();
 d3.printDateSlash();
 d4.printDateSlash();
 cout << '\n';

 d1.printDateDay(); 
 d2.printDateDay();
 d3.printDateDay();
 d4.printDateDay();
 cout << '\n';

 d1.printDateMonth(); 
 d2.printDateMonth();
 d3.printDateMonth();
 d4.printDateMonth();
 cout << endl;

return 0;
}