c++ code for making scientific calculator

Certainly! Here's a simple C++ code for a basic scientific calculator that can perform operations like addition, subtraction, multiplication, division, and trigonometric functions (sine, cosine, and tangent). This code uses the <cmath> library for trigonometric functions.

cpp

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#include <iostream>

#include <cmath>

using namespace std;

int main() {

    int choice;

    double num1, num2;

    cout << "Scientific Calculator" << endl;

    cout << "1. Add\n2. Subtract\n3. Multiply\n4. Divide\n5. Sine\n6. Cosine\n7. Tangent" << endl;

    cout << "Enter your choice (1-7): ";

    cin >> choice;

    switch (choice) {

        case 1:

            cout << "Enter two numbers: ";

            cin >> num1 >> num2;

            cout << "Result: " << num1 + num2 << endl;

            break;

        case 2:

            cout << "Enter two numbers: ";

            cin >> num1 >> num2;

            cout << "Result: " << num1 - num2 << endl;

            break;

        case 3:

            cout << "Enter two numbers: ";

            cin >> num1 >> num2;

            cout << "Result: " << num1 * num2 << endl;

            break;

        case 4:

            cout << "Enter two numbers: ";

            cin >> num1 >> num2;

            if (num2 != 0)

                cout << "Result: " << num1 / num2 << endl;

            else

                cout << "Error: Division by zero" << endl;

            break;

        case 5:

            cout << "Enter an angle in radians: ";

            cin >> num1;

            cout << "Result: " << sin(num1) << endl;

            break;

        case 6:

            cout << "Enter an angle in radians: ";

            cin >> num1;

            cout << "Result: " << cos(num1) << endl;

            break;

        case 7:

            cout << "Enter an angle in radians: ";

            cin >> num1;

            cout << "Result: " << tan(num1) << endl;

            break;

        default:

            cout << "Invalid choice" << endl;

    }

    return 0;

}

This is a basic example, and you can extend it to include more advanced operations and error handling as needed. Remember that this code assumes input in radians for trigonometric functions.