Add calculator.cpp with basic operations

Author: Anika

Calculator.cpp

@@ -0,0 +1,27 @@
+#include <iostream>
+using namespace std;
+
+class Calculator {
+public:
+    int add(int a, int b) { return a + b; }
+    int subtract(int a, int b) { return a - b; }
+    int multiply(int a, int b) { return a * b; }
+    double divide(int a, int b) {
+        if (b == 0) {
+            cout << "Error: Division by zero!" << endl;
+            return 0;
+        }
+        return (double)a / b;
+    }
+};
+
+// Example usage
+int main() {
+    Calculator calc;
+    cout << "Add: " << calc.add(5, 3) << endl;
+    cout << "Subtract: " << calc.subtract(5, 3) << endl;
+    cout << "Multiply: " << calc.multiply(5, 3) << endl;
+    cout << "Divide: " << calc.divide(5, 3) << endl;
+    return 0;
+}
+