Program 12

Design, develop, and execute a program in C++ to create a class called DATE with methods to accept two valid dates in the form dd/mm/yy and to implement the following operations by overloading the operators + and -. After every operation the results are to be displayed by overloading the operator <<.

i.) no_of_days = d1 – d2; where d1 and d2 are DATE objects, d1 >=d2 and no_of_daysis an integer.

ii.) d2 = d1 + no_of_days; where d1 is a DATE object and no_of_days is an integer.

#include<iostream.h>

#include<conio.h>

#include<process.h>

class date

{

private:

int d,m,y;

int a[20];

public:

date()

{

a[1]=31;

a[3]=31;

a[5]=31;

a[7]=31;

a[8]=31;

a[10]=31;

a[12]=31;

a[4]=30;

a[6]=30;

a[9]=30;

a[11]=30;

a[2]=28;

}

friend date operator + (date,int);

friend int operator - (date,date);

friend ostream& operator << (ostream &, date);

void read();

};

date operator + (date d1, int x)

{

int i;

for(i=1;i<=x;i++)

{

d1.d++;

if(d1.y % 4==0)

d1.a[2]=29;

else

d1.a[2]=28;

if(d1.d > d1.a[d1.m])

{

d1.d=1;

d1.m++;

}

if(d1.m > 12)

{

d1.m=1;

d1.y++;

}

}

return d1;

}

int operator - (date d1,date d2)

{

int count=0;

if(d1.m==d2.m && d1.y==d2.y)

{

count = d1.d-d2.d;

return count;

}

while(!((d1.d==d2.d)&&(d1.m==d2.m)&&(d1.y==d2.y)))

{

count++;

d2.d++;

if(d2.y % 4==0)d2.a[2]=29;

elsed2.a[2]=28;

if(d2.d > d2.a[d2.m]){

d2.d=1;d2.m++;

}

if(d2.m > 12){

d2.m=1;d2.y++;

}

}return count;

}ostream& operator << (ostream& os,date d1){

os<<d1.d<<"/"<<d1.m<<"/"<<d1.y<<endl;return os;

}void date :: read(){

cin>>d>>m>>y;}

void main()

{

date d1,d2;

int choice, x;

clrscr();

for(;;)

{

cout<<"1.Subtraction\n2. Addition\n";

cout<<"Enter your choice ";

cin>>choice;

switch(choice)

{

case 1: cout<<"Enter Valid date 1: ";

d1.read();

cout<<"Enter valid date 2: ";

d2.read();

x=d1-d2;

cout<<"No. of days between d1 & d2 : "<<x<<endl;

break;

case 2:cout<<"Enter valid date : ";

d1.read();

cout<<"Enter the no. of days to be added : ";

cin>>x;

d2=d1+x;

cout<<"New date : "<<d2<<endl;

break;

default: exit(0);

}

}

}