Welcome to C++ Project 10 - Factorial Calculator

This project will guide you through creating a factorial calculator in C++ that calculates the factorial of a given number using both iterative and recursive methods.

Hardware Setup

Ensure you have the following hardware components:

A computer with internet access.
A keyboard and mouse for typing and navigation.

Software Requirements

Here are the software tools you'll need for this project:

Visual Studio Code or CLion - These are popular Integrated Development Environments (IDEs) for C++ development.
GCC or Visual Studio - Required to compile and run C++ programs.

Knowledge Prerequisites

To successfully complete this project, you should be familiar with the following concepts:

Basic understanding of C++ syntax.
Understanding of loops and recursion in C++.

Difficulty Rating

Easy Difficulty

Project Time!!!

“The only way to do great work is to love what you do.” - Steve Jobs

Project Steps:

Done

Download and install Visual Studio Code or CLion.
Ensure you have a C++ compiler installed. For example, you can install GCC or use the built-in compiler in Visual Studio.

Done

Open your chosen IDE (Visual Studio Code or CLion).
Create a new file named factorial_calculator.cpp.

Done

Open the factorial_calculator.cpp file in your IDE.

Type the following code:


#include <iostream>

using namespace std;

// Iterative method to calculate factorial
unsigned long long factorialIterative(int n) {
    unsigned long long result = 1;
    for (int i = 1; i <= n; ++i) {
        result *= i;
    }
    return result;
}

// Recursive method to calculate factorial
unsigned long long factorialRecursive(int n) {
    if (n <= 1)
        return 1;
    else
        return n * factorialRecursive(n - 1);
}

int main() {
    int number;

    cout << "Enter a positive integer: ";
    cin >> number;

    if (number < 0) {
        cout << "Factorial is not defined for negative numbers." << endl;
    } else {
        cout << "Iterative: " << number << "! = " << factorialIterative(number) << endl;
        cout << "Recursive: " << number << "! = " << factorialRecursive(number) << endl;
    }

    return 0;
}

Save the file.

Done

Open the terminal in your IDE and navigate to the directory containing factorial_calculator.cpp.
Type the following command to compile your application:
```
g++ factorial_calculator.cpp -o factorial_calculator
```
Type the following command to run your application:
```
./factorial_calculator
```
Enter a positive integer and see its factorial calculated both iteratively and recursively.

Welcome to C++ Project 10 - Factorial Calculator

Hardware Setup

Software Requirements

Knowledge Prerequisites

Difficulty Rating

Easy Difficulty

Project Time!!!

Project Steps:

Congratulations! You've created and run a factorial calculator in C++. Now you're ready to tackle more complex projects.