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

Here is the answer for your question in C++ Programming Language.

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NOTE : I have tested the class with three data types, int, float and char.

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CODE :

#include<iostream> using namespace std; template <typename T> class Number{    public:        Number(T n){            this->number = n;        }               T operator+(const Number &n){            return this->number + n.number;          }        T operator-(const Number &n){            return this->number - n.number;          }        bool operator<(const Number &n){            return this->number < n.number;          }        bool operator>(const Number &n){            return this->number > n.number;          }        friend ostream &operator<<(ostream &out,const Number &n){            out << n.number;            return out;        }        friend istream &operator>>(istream &in,Number &n){            in >> n.number;            return in;        }    private:        T number; }; int main(){       //TESTING WITH INT VALUES    Number<int> n1(50);    Number<int> n2(10);          cout << "n1. " << n1 << endl;      cout << "n2. " << n2 << endl;      cout << "Sum of n1 and n2: " << n1+n2 << endl;    cout << "Difference of n1 and n2: " << n1-n2 << endl;          if(n1 > n2)        cout << n1 << " is greater than " << n2 << endl;    if(n1 < n2)        cout << n1 << " is lesser than " << n2 << endl;       cout << "Enter a number: ";    cin >> n1;    cout << "You have entered: " << n1 << endl;    cout << "===============================================" << endl;    //TESTING WITH FLOAT VALUES    Number<float> f1(52.3);    Number<float> f2(34.5);          cout << "f1. " << f1 << endl;      cout << "f2. " << f2 << endl;      cout << "Sum of f1 and f2: " << f1+f2 << endl;    cout << "Difference of f1 and n2: " << f1-f2 << endl;          if(f1 > f2)        cout << f1 << " is greater than " << f2 << endl;    if(f1 < f2)        cout << f1 << " is lesser than " << f2 << endl;       cout << "Enter a number: ";    cin >> f1;    cout << "You have entered: " << f1 << endl;       cout << "===============================================" << endl;    //TESING WITH CHARACTERS    Number<char> c1('C');    Number<char> c2('D');          cout << "c1. " << c1 << endl;      cout << "c2. " << c2 << endl;          if(c1 > c2)        cout << c1 << " is greater than " << c2 << endl;    if(c1 < c2)        cout << c1 << " is lesser than " << c2 << endl;       cout << "Enter a character: ";    cin >> c1;    cout << "You have entered: " << c1 << endl;          return 0; }

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SCREENSHOTS :

Please see the screenshots of the code below for the indentations of the code.

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OUTPUT :

Any doubts regarding this can be explained with pleasure :)