C++ program to make a simple calculator project

Project Digital Calculator in C++

Description de C++ Calculator:

Create a simple console-based digital calculator that can perform addition, subtraction, multiplication, and division operations. The user will input two numbers and select an operation, and the calculator will display the result.

 

    Features:

 
User Input: Prompt the user to enter two numbers and the operation they want to perform.
Operations: Implement functions for addition, subtraction, multiplication, and division.
Calculation: Based on the selected operation, perform the corresponding calculation on the entered numbers.
Display Result: Output the result of the calculation to the user.

Implementation Steps:
User Input:
    *Use cin to get input from the user for the two numbers and the desired operation (e.g., +, -, *, /).
Operations:
    *Create separate functions for each arithmetic operation: add, subtract, multiply, and divide.
    *Each function should take the two numbers as parameters and return the result of the operation.
Calculation:
    *Inside each operation function, perform the corresponding arithmetic operation using the provided numbers.
    *For division, make sure to handle cases where division by zero occurs.
Display Result:
    *After performing the calculation, use cout to display the result to the user.
User Interface:
    *Use a loop to allow the user to perform multiple calculations without restarting the program.
    *Display a menu of available operations for the user to choose from.

Sample C++ Calculator Code:

#include 

// Function to perform addition
double add(double a, double b) {
    return a + b;
}

// Function to perform subtraction
double subtract(double a, double b) {
    return a - b;
}

// Function to perform multiplication
double multiply(double a, double b) {
    return a * b;
}

// Function to perform division
double divide(double a, double b) {
    if (b != 0) {
        return a / b;
    } else {
        std::cout << "Error: Division by zero!" << std::endl;
        return 0.0;
    }
}

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

    do {
        std::cout << "Enter first number: ";
        std::cin >> num1;

        std::cout << "Enter operation (+, -, *, /): ";
        std::cin >> operation;

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

        double result;

        switch (operation) {
            case '+':
                result = add(num1, num2);
                break;
            case '-':
                result = subtract(num1, num2);
                break;
            case '*':
                result = multiply(num1, num2);
                break;
            case '/':
                result = divide(num1, num2);
                break;
            default:
                std::cout << "Invalid operation!" << std::endl;
                continue;  // Skip the rest of the loop and start over
        }

        std::cout << "Result: " << result << std::endl;

        char choice;
        std::cout << "Do you want to perform another calculation? (y/n): ";
        std::cin >> choice;

        if (choice != 'y' && choice != 'Y') {
            break;  // Exit the loop if the user doesn't want to continue
        }

    } while (true);

    std::cout << "Calculator closed." << std::endl;
    return 0;
}

Note:

• The sample code above provides a basic structure for a digital calculator in C++. You can expand upon this by adding more error handling, improving the user interface, and enhancing the overall functionality.

• This project is a great opportunity to practice using functions, conditional statements, and loops in C++.

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