Найти сумму и произведение всех целых чисел от 1 до 10 — C++(Си)

#include <iostream>
 
unsigned long getArithmeticalProgressionSum(unsigned int n) {
  return (n + 1) * n / 2;
}
 
unsigned long getFactorial(unsigned int n) {
  return n ? n * getFactorial(n - 1) : 1;
}
 
int main () {
    unsigned int n = 10;
    std::cout << "\n The sum of 1 + ... + " << n << " is " << getArithmeticalProgressionSum(n);
    std::cout << "\n " << n << "! is " << getFactorial(n);
    return 0;
}