A prime number is an integer greater or equal to 2 that is only divisible by 1 and by itself. The first few primes are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47 …N is a prime if and only if it is not divisible evenly by any of the numbers from 2 to N−1. Let’s implement this decision as a function.In the same program numbers.cpp, add a functionbool isPrime(int n);The function should return true if n is a prime, otherwise return false. Change the main function to test your new code.

Sure, here is a simple implementation of the isPrime function in C++:

#include <iostream>

bool isPrime(int n) {
    if (n <= 1) {
        return false;
    }
    for (int i = 2; i < n; i++) {
        if (n % i == 0) {
            return false;
        }
    }
    return true;
}

int main() {
    int number;
    std::cout << "Enter a number: ";
    std::cin >> number;
    if (isPrime(number)) {
        std::cout << number << " is a prime number.";
    } else {
        std::cout << number << " is not a prime number.";
    }
    return 0;
}

In this code, the isPrime function checks if the input number n is less than or equal to 1. If it is, the function returns false because 1 is not a prime number. Then, it uses a for loop to check if n is divisible by any number from 2 to n-1. If n is divisible by any of these numbers, the function returns false because n is not a prime number. If n is not divisible by any of these numbers, the function returns true because n is a prime number.

The main function asks the user to enter a number, then it calls the isPrime function with the entered number. If the isPrime function returns true, it prints that the number is a prime number. Otherwise, it prints that the number is not a prime number.