🧮 Basic Calculator in C++

#include <iostream>
using namespace std;

int main() {
    double num1, num2;
    char op;

    cout << "🧮 Simple Calculator in C++\n";
    cout << "---------------------------\n";

    // Input from user
    cout << "Enter first number: ";
    cin >> num1;

    cout << "Enter an operator (+, -, *, /): ";
    cin >> op;

    cout << "Enter second number: ";
    cin >> num2;

    cout << "---------------------------\n";

    // Operation handling
    switch(op) {
        case '+':
            cout << "Result: " << num1 + num2 << endl;
            break;
        case '-':
            cout << "Result: " << num1 - num2 << endl;
            break;
        case '*':
            cout << "Result: " << num1 * num2 << endl;
            break;
        case '/':
            if (num2 != 0)
                cout << "Result: " << num1 / num2 << endl;
            else
                cout << "❌ Error: Division by zero!" << endl;
            break;
        default:
            cout << "❌ Error: Invalid operator!" << endl;
    }

    return 0;
}

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✅ Features:

• Supports: +, -, *, /
• Input validation for division by zero
• Clean and readable structure

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🛠 How to Compile & Run:

1. Save the code in a file, e.g., calculator.cpp
2. Compile it with any C++ compiler:

   g++ calculator.cpp -o calculator

1. Run it:

   ./calculator

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Would you like to extend this calculator with:

• multiple operations (chained expressions)?
• a GUI version (Qt or Windows)?
• scientific functions (sin, cos, sqrt, etc)?