Update date_lab.cpp

date_lab.cpp

@@ -1,78 +1,144 @@
-#include <iostream>
+#include<iostream>
 using namespace std;
+class Date 
+{
+	int d,m,y;
+	public:
+	void read()
+	{
+		cout<<"Enter Date (d/m/y)\n";
+		cin>>d>>m>>y;
+	}
+	int check()
+	{
+		int f=0;
+		if(y>1000&&y<4000)
+		{
+			if((m==1||m==3||m==5||m==7||m==8||m==10||m==12)&&d>0&&d<=31)
+			{
+				cout<<"Valid\n";
+				f=1;
+			}		
+			else if((m==4||m==6||m==9||m==11)&&d>0&&d<31)
+			{
+				cout<<"Valid\n";
+				f=1;
+			}
+
+			else if(m==2)
+			{
+				if(y%4==0&&d>0&&d<=29)
+				{
+					cout<<"Valid\n";
+					f=1;
+				}
+				else if(d>0&&d<29)
+				{
+					cout<<"Valid\n";
+					f=1;
+				}
+				else
+				cout<<"Not Valid\n";
+			}
+
+			else
+			cout<<"Not Valid\n";
+		}
+		else
+		cout<<"Not Valid\n";
+		return f;
+	}
+	Date operator +(int n);
+	void show()
+	{
+		cout<<d<<"/"<<m<<"/"<<y;
+	}
 
-class dates {
-  private:
-    int day, month, year, last;
-  public:
-    void input();
-  void Month();
-  void Day();
-  void output();
-  void valid();
+	void next()
+	{			
+		if(m==1||m==3||m==5||m==7||m==8||m==10)
+			{
+				if(d<31)
+				d++;
+				else if(d==31)
+				{
+					m++;
+					d=1;
+				}
+			}
+
+			else if(m==4||m==6||m==9||m==11)
+			{
+				if(d<30)
+				d++;
+				else if(d==30)
+				{
+					m++;
+					d=1;
+				}
+			}
+			else if(m==2)
+			{
+				if(y%4==0)
+				{
+					if(d<29)
+					d++;
+					else if(d==29)
+					{
+						m++;
+						d=1;
+					}
+				}
+				else 
+				{
+					if(d<28)
+					d++;
+					else if(d==28)
+					{
+						m++;
+						d=1;
+					}
+				}
+			}
+			else if(m==12)
+			{
+				if(d<31)
+				d++;
+				else if(d==31)
+				{
+					y++;
+					m=1;
+					d=1;
+				}
+			}
+
+		}
 };
 
-void dates::input() {
-  cout << "\nEnter the Date DD MM YYYY :";
-  cin >> day >> month >> year;
-}
-//Month
-void dates::Month() {
-  if (month > 0 && month <= 12) {
-    if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) {
-      last = 31;
-      Day();
-    } else if (month == 4 || month == 6 || month == 9 || month == 11) {
-      last = 30;
-      Day();
-    } else if (month == 2) {
-      if ((year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0)) {
-        last = 29;
-        Day();
-      } else {
-        last = 28;
-        Day();
-      }
-    }
-  } else
-    cout << "Invalid";
-}
-//Day
-void dates::Day() {
-  if (day > 0 && day <= last) {
-    valid();
-
-  } else
-    cout << "Invalid";
-}
-//output
-void dates::output() {
-  if (day == last) {
-    if (month == 12) {
-      day = 1;
-      month = 1;
-      year++;
-    } else {
-      day = 1;
-      month++;
-    }
-  } else if (day != last) {
-    day++;
-  }
-  cout << day << "/" << month << "/" << year;
-}
-//valid
-void dates::valid() {
-  cout << "\n Valid \n";
-  output();
-}
-
-int main() {
-  dates d;
-  d.input();
-  d.Month();
-
-  cout << "Hello world " << endl;
-
-  return 0;
+Date Date::operator +(int n)
+	{
+		Date r;
+		r.d=d;
+		r.m=m;
+		r.y=y;
+		for(int i=0;i<n;i++)
+		{
+			r.next();
+		}
+		return r;
+	}
+int main()
+{
+	int f=1,n;
+	Date d;
+	d.read();
+	f=d.check();
+	if(f==1)
+	{
+		cout<<"Number of days to be added:";
+		cin>>n;
+		Date q=d+n;
+		q.show();
+	}
+	return 0;
 }