calculator_template.cpp

/*
 * File: calculator_template.cpp
 * Problem:
 * Create a class template Calculator that performs basic operations
 * (addition, multiplication) for both integer and double values.
 */

#include <iostream>
using namespace std;

// create class template Calculator
template <typename T>
class Calculator {
public:
    // variables of T type
    T num1, num2;

    // constructor initializer list
    Calculator(T n1, T n2) : num1(n1), num2(n2) {}

    // calculate function with operator parameter
    T calculate(char op) {
        if (op == '+')
            return num1 + num2;
        else if (op == '*')
            return num1 * num2;
        else
            return static_cast<T>(0.0); // return 0 of type T
    }
};

int main() {
    // get input values
    int n1, n2;
    double n3, n4;
    cin >> n1 >> n2 >> n3 >> n4;

    // create Calculator object for integer type
    Calculator<int> obj1(n1, n2);
    int result1 = obj1.calculate('*');

    // create Calculator object for double type
    Calculator<double> obj2(n3, n4);
    double result2 = obj2.calculate('+');

    // print results
    cout << result1 << endl << result2;

    return 0;
}