Question

Write a template class Number with the following features
Overload following operators for the template class
+
-
<
>
Overload << and >> operators for the ostream and istream against this class.
Write a main function to demonstrate the functionality of each operator.

Answer 1

all function and operator has been overloaded through friend function and it is able to produce output of all these

operator

code is below:-

#include <iostream> 
using namespace std; 
  
class operation 
{ 
private: 
    int num;
public: 
    operation(int r = 0) 
    {  num = r; } 
    friend ostream & operator << (ostream &out, const operation &c); 
    friend istream & operator >> (istream &in,  operation &c); 
    friend operation operator + (operation const &, operation const &); 
    friend operation operator - (operation const &, operation const &); 
    friend operation operator > (operation const &, operation const &); 
    friend operation operator < (operation const &, operation const &);
    void print()
{
cout<<num<<endl;
} 
}; 
  
ostream & operator << (ostream &out, const operation &c) 
{   out<<"Entered number is : "<<c.num<<endl;
    return out; 
} 
  
istream & operator >> (istream &in,  operation &c) 
{ 
    cout << "Enter Number \n"; 
    in >> c.num; 
    return in; 
} 
  operation operator + (operation const &c1, operation const &c2) 
{ 
     return operation(c1.num + c2.num);
} 
   operation operator - (operation const &c1, operation const &c2) 
{ 
     return operation(c1.num - c2.num);
} 

    operation operator > (operation const &c1, operation const &c2) 
{ 
      if(c1.num>c2.num) return c1.num;
     return c2.num;
}   
  operation operator < (operation const &c1, operation const &c2) 
{ 
      if(c1.num<c2.num) return c1.num;
     return c2.num;
}   

int main() 
{ 
   operation c1; 
   operation c2;
   operation c3;
   cin >> c1;  
   cout << c1; 
   cin>>c2;
   cout<<c2;
   c3=c1+c2;
   cout<<"\n"<<endl;
  cout<<"sum is : ";c3.print();cout<<"\n";
  c3=c1-c2;
   cout<<"Difference  is : ";c3.print();cout<<"\n";
  c3=c1>c2;
    cout<<"Greater  is : ";c3.print();cout<<"\n";
   c3=c1<c2;
   cout<<"Smaller  is : ";c3.print();cout<<"\n";
   return 0; 
}

output is mentioned below

output 2

Explanation :- all declared method operator overloaded function are declared as friend function because this function can access directly private and protected data and methods