CALCULATOR(WITH TEMPLATES) IN C++

 #include <iostream>

 using namespace std;

 template <class T>

class sum{

T c;

    public:

 sum (T a,T b){

     c=a+b;

   

}

T display(){

    cout<<" value of c is "<<c<<endl;

    T d=c*c;

    cout<<"Value of c's square is "<<d<<endl;

    return d ;

 }

};

template <class T>

class calculator{

T a;

T b;

public:

T sum(T c,T d){

    a=c;

    b=d;

    return a+b;

}

T difference(T c,T d){

    a=c;

    b=d;

    return a-b;

}

T product(T c,T d){

    a=c;

    b=d;

    return a*b;

}

T quotient(T c,T d){

    a=c;

    b=d;

    return a/b;

}

void display(T c,T d){

    a=c;

    b=d;

    cout<<" the sum of a and b is "<<sum(c,d)<<endl;

    cout<<" the difference of a and b is "<<difference(c,d)<<endl;

    cout<<" the product of a and b is "<<product(c,d)<<endl;

    cout<<" the quotient of a and b is "<<quotient(c,d)<<endl;

}

};

 int main() {

 calculator<double> c;

 c.display(5,6);

 return 0;

 }