C++ Program: Design a class called Date. The class should store a specific date
ID: 3673560 • Letter: C
Question
C++ Program:
Design a class called Date. The class should store a specific date in three integers: month, day, and year. There should be member functions to print the date in the following four forms, if it is valid:
12/25/2012 (US)
December 25, 2012 (US expanded)
25 December 2012 (US Military)
2012-12-25 (International)
There should be member functions to get and/or set value of month, day, and year.
There should be member functions to check for invalid date entered, such as 4/31/2012, or 2/29/2011, which will be rejected with an error message, and the program should ask for another date entered.
Write a complete C++ program to demonstrate the class.
Allow your program to run continuously as long as the user wishes.
Input validation:
Do not accept values for the day greater than 31 or less than 1.
Do not accept values for the month greater than 12 or less than 1.
Do not accept any invalid date. If it is, display the message “The date is invalid”.
The program displays a valid date in three different formats. Note: All junk data will be rejected!
Enter a date (mm/dd/yyyy) or -1 to end: 2/29/2008
Invalid date/ wrong format: For both month and day, use two digits. Re-Enter a date (mm/dd/yyyy) or -1 to end: 02/29/2009
2009 -> NOT Leap Year!
29 is not a valid day of Febraury
Error!!! The entered date is invalid! Re-Enter, Please! Enter a date (mm/dd/yyyy) or -1 to end: 02/29/2008
2008 -> Leap Year! Date: 2/29/2008 is valid.
2/29/2008 (US).
Febraury 29, 2008 (US Expanded). 29 Febraury 2008 (US Military). 2008-02-29 (International).
Run again (y/n)? y
The program displays a valid date in three different formats.
Note: All junk data will be rejected!
Enter a date (mm/dd/yyyy) or -1 to end: 4/31/1975
Invalid date/ wrong format: For both month and day, use two digits. Re-Enter a date (mm/dd/yyyy) or -1 to end: 04/31/1975
31 is not a valid day of April
Error!!! The entered date is invalid! Re-Enter, Please!
Enter a date (mm/dd/yyyy) or -1 to end: 04/30/1975 Date: 4/30/1975 is valid.
4/30/1975 (US).
April 30, 1975 (US Expanded). 30 April 1975 (US Military). 1975-04-30 (International).
Run again (y/n)? n
Press <Enter> key to end ...
Explanation / Answer
#include<stdio.h>
#include<iostream>
#include<string>
#include<stdlib.h>
using namespace std;
class Date
{
public:
int dd;
int mm;
int yy;
public:
void setDate(int dd, int mm, int yy)
{
this->dd=dd;
this->mm=mm;
this->yy=yy;
}
bool isValid(int dd, int mm, int yy)
{
if(mm==1||mm==3||mm==5||mm==7||mm==8||mm==10||mm==12)
{
if(dd>31||dd<1)
{
return false;
}
else
return true;
}
else if(mm==2)
{
if((dd>28)&&(!leapYear(yy)))
{
cout<<" "<<yy<<" -> Not a Leap Year!";
cout<<dd<<" is not a valid date of February!"<<endl;
return false;
}
else
return true;
}
else
{
if(dd>30||dd<1)
{
return false;
}
else
return true;
}
}
int leapYear(int yr)
{
if(yr%4 == 0)
{
if( yr%100 == 0)
{
if ( yr%400 == 0)
return 1;
else
return 0;
}
else
return 1;
}
else
return 0;
}
};
int main()
{
int dd,mm,yy;
string dateInp;
while(true)
{
cout << "Enter a date (mm/dd/yyyy): " << endl;
cin >> dateInp;
if(dateInp.compare("-1"))
break;
mm = stoi(dateInp.substr(0,2));
dd = stoi(dateInp.substr(3,2));
yy = stoi(dateInp.substr(6));
Date date;
if(date.isValid(dd,mm,yy))
{
date.setDate(dd,mm,yy);
}
else
{
printf(" Invalid Date!! Enter again!");
}
}
}
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