8a- octal class

/************************
9) a)Write a C++ program to create a class called OCTAL, which has the characteristics of an octal

number. Get the Input using >> operator , 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 integer.

Display the OCTAL result by overloading the operator <<. Also display the values of h and y.
************************/


#include <iostream> 
#include <math.h> 
using namespace std;

class octal 
{ 
   private: 
    int o; 
   public: 
    octal(); 
    octal(int); 
    ~octal(); 
    int dectooct(int x); 
    int octtodec(int x); 
    friend ostream &operator<<(ostream &print,octal); 
    int operator +(int); 
}; 

octal::octal() 
{ } 

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


octal::~octal() 
{ }


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; 
   cout<<endl<<"Enter the value of x in decimal notation: "; 
   cin>>x; 
   octal h = x; 
   cout<<endl<<"Corresponding value of x in octal notation, h= "<<h; 
   cout<<endl<<"Enter the value of k in decimal notation: "; 
   cin>>k; 
   cout<<endl<<"The value of k= "<<k; 
   y=h+k; 
   cout<<endl<<"The value of h+k in decimal notation, y = "<<y<<endl; 
   return 0; 
}