AIM:

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

THEORY:

A constructor (sometimes shortened to ctor) in a class is a special type of subroutine called to create an object. It prepares the new object for use, often accepting arguments that the constructor uses to set member variables required.

ALGORITHM:

1. START
2. Accept an input say x.
3. Enter the value of x in decimal notation,find the remainder of x on dividing by 8
4. Corresponding value of x in octal notation is showed.
5. Enter the value of k in decimal notation
6. The value of h+k in decimal notation is shown.
7. The value of h+k in octal notation is shown.

CODE: octal.cpp

#include <iostream>
#include <math.h>
using namespace std;
class octal
{
int o;
public:
    octal(int);
    int dectooct(int x);
    int octtodec(int x);
    friend ostream &operator<<(ostream &print,octal);
    int operator +(int);
};

octal::octal(int x)
{
    o=dectooct(x);
}

int octal::dectooct(int x)
{
int i=0,sum=0,rem;
while(x!=0)
{
    rem=x%8;
    sum=sum+rem*pow(10,i);
    i++;
    x=x/8;
}
return sum;
}
int octal::octtodec(int x)
{
int i=0,sum=0,rem;
while(x!=0)
{
    rem=x%10;
    sum=sum+rem*pow(8,i);
    i++;
    x=x/10;
}
return sum;
}
ostream &operator<<(ostream &print,octal x)
{
print<<x.o;
return print;
}
int octal::operator+(int x)
{
    return octtodec(o)+x;
}

int main()
{
int x,y,k,yOct;
cout<<endl<<"Enter the value of x in decimal notation:";
cin>>x;
octal h=x;
cout<<"Corresponding value of x in octal notation: h = "<<h;
cout<<endl<<"Enter the value of k in decimal notation:";
cin>>k;
cout<<"The value of k="<<k<<endl;
y=h+k;
cout<<"The value of h+k in decimal notation,y="<<y<<endl;

yOct = h.dectooct(y);
cout<<"The value of h+k in octal notation,y="<<yOct<<endl;        
return 0;
}

OUTPUT:

Enter the value of x in decimal notation:100

Corresponding value of x in octal notation: h = 144

Enter the value of k in decimal notation:5

The value of k=5

The value of h+k in decimal notation,y=105

The value of h+k in octal notation,y=151