Installation and Configuration
Programming Methodology

Simple Calculator Simulation in C++

In this exercise, you will create a C++ program that simulates a basic calculator. The calculator will perform simple arithmetic operations such as addition, subtraction, multiplication, and division. The user will input two numbers and choose the operation they wish to perform.

The program will use a `switch` statement to handle different operations. Based on the user’s choice, the program will perform the corresponding arithmetic operation and display the result.

Group

Flow Control in C++

Objective

1. Ask the user to input two numbers.
2. Prompt the user to select an operation (addition, subtraction, multiplication, or division).
3. Use a switch statement to handle the operations and perform the corresponding calculation.
4. Display the result of the selected operation.
5. Make sure to handle division by zero errors.

Write a program that simulates a calculator with operations like addition, subtraction, multiplication, and division.

Example C++ Exercise

 Copy C++ Code 
#include <iostream> // Include the iostream library for input and output

using namespace std; // Use the standard namespace

// Main function - the entry point of the program
int main() {
    double num1, num2; // Variables to store the two numbers
    char operation; // Variable to store the selected operation

    // Ask the user for input
    cout << "Enter first number: ";
    cin >> num1; // Read the first number

    cout << "Enter second number: ";
    cin >> num2; // Read the second number

    // Ask the user to choose an operation
    cout << "Enter operation (+, -, *, /): ";
    cin >> operation; // Read the chosen operation

    // Switch statement to handle different operations
    switch (operation) {
        case '+':
            cout << "Result: " << num1 + num2 << endl; // Addition
            break;
        case '-':
            cout << "Result: " << num1 - num2 << endl; // Subtraction
            break;
        case '*':
            cout << "Result: " << num1 * num2 << endl; // Multiplication
            break;
        case '/':
            // Check if division by zero is attempted
            if (num2 != 0) {
                cout << "Result: " << num1 / num2 << endl; // Division
            } else {
                cout << "Error: Division by zero is not allowed." << endl; // Handle division by zero
            }
            break;
        default:
            cout << "Invalid operation." << endl; // Handle invalid operation input
    }

    return 0; // Return 0 to indicate that the program executed successfully
}

 Output

Enter first number: 10
Enter second number: 5
Enter operation (+, -, *, /): +
Result: 15

//Or if you try division by zero:
Enter first number: 10
Enter second number: 0
Enter operation (+, -, *, /): /
Error: Division by zero is not allowed.

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