/* 7. Write a C++ program to create a class OCTAL which has the characteristics of an octal number. Implement the following by writing an appropriate constructor and an overloaded operator +. Display the OCTAL object by overloading the operator <<. Also display the values of k and y.
(i) OCTAL h=x; where x is an integer.
(ii) int y=h+k; where h is an OCTAL object and k is an integer. */

#include<iostream.h>
#include<conio.h>
class OCTAL
{
    int val;

    public:
        OCTAL(int x);
        void Display();
        friend int operator +(OCTAL x,int y);
};
int operator +(OCTAL x,int y)
{
    int r1,r2,res,cy=0,num1=x.val,num2,mul=1,rem,sum=0;
    OCTAL Temp(y);
    Temp.Display();
    num2=Temp.val;
    while (num1 != 0 || num2 != 0)
    {
        r1 = num1 % 10;
        r2 = num2 % 10;
        res = r1 + r2 + cy;
        if (res > 7)
        {
            cy = 1;
            res = res - 8;
        }
        else
            cy = 0;
        sum += res * mul;
        mul *= 10;
        num1 = num1 / 10;
        num2 = num2 / 10;
    }
    sum += cy*mul;
    cout<<"\n\nResult : (OCTAL) "<<x.val<<" + (OCTAL) "<<Temp.val<<" = (OCTAL) ";
    return (sum);
}
OCTAL::OCTAL(int x)
{       int sum=0,rem,mul=1,num = x;
        while (num > 0)
        {
            rem = num % 8;
            sum += rem * mul;
            mul *= 10;
            num = num / 8;
        }
        num = x;
        val = sum;
}
void OCTAL::Display()
{
    cout<<"\n\nOctal equivalent is "<<val;
}
void main()
{
    int x;
    cout<<"\nEnter an integer number : ";
    cin>>x;
    OCTAL h=x;
    h.Display();
    int k;
    cout<<"\n\nEnter an integer number to add with the OCTAL value : ";
    cin>>k;
    int y=h+k;
    cout<<y;
    getch();
}