->proj03;

Accept the project invitation from GitHub Classroom: here. Then, open VS Code through Coder and clone your repository. You will need to create all the files for this project yourself, so be sure to create a Java file, an Ada file, a Clojure file, and a Ruby file.

This week’s project is to use the equivalent of a C++ for construct in each of our four languages. More precisely, here is a C++ function and program that, given an integer n, returns n!.

#include <iostream>
using namespace std;

double factorial(unsigned n) {
    double answer = 1.0;

    for (int i = 2; i <= n; i++) {
        answer *= i;
    }

    return answer;
}

int main() {
    cout << "\nTo compute n!, enter n: ";
    unsigned n;
    cin >> n;

    cout << n << "! = " << factorial(n) << endl;
}

Your project is to implement the equivalent program in Java, Ada, Clojure, and Ruby. Each program should have a subprogram that computes n!, and an interactive “driver” that handles I/O and invokes that subprogram.

Java¶

Write a Java method that computes n! using a for loop, as described in the lab exercise.

Ada¶

Since this is an integer counting problem, you should compute n! using the counting version of the loop construct, as described in the lab exercise.

Clojure¶

Compute n! by designing and implementing a recursive function, or a non-recursive function that uses Clojure’s recursive loop() function.

Ruby¶

Write a Ruby method that computes n! using a for loop, as described in the lab exercise.

Make sure to test your program on a variety of input values, including edge cases (e.g., 0! and 1!).

When you are certain it is correct, commit and push your changes to GitHub.