Найти минимальное и максимальное значение массива, поменять их местами

#include <iostream>
#include <iterator>
#include <algorithm>
 
double random(double low, double range) {
   return (range - low) * static_cast<double>(rand()) / RAND_MAX + low;
}
 
int main() {
   const int size = 10;
   double values[size];
 
   // create lambda generator to use in generate_n
   auto generator_function = [] { 
      return random (-20, 20); 
   };
 
   // fill `values' by random numbers
   std::generate_n(values, size, generator_function);
   
   // find min element and max element
   double * min = std::min_element(values, values + size);
   double * max = std::max_element(values, values + size);
 
   // print out 
   std::cout << "source state of `value' array's contentn";
   std::copy(values, values + size, std::ostream_iterator<double>(std::cout, " "));
   std::cout << "nn";
 
   // swap min and max
   std::cout << "minimum element has " << std::distance(values, min) << " index and value: " << *min << "n"
            << "maximum element has " << std::distance(values, max) << " index and value: " << *max << "n"
           << "n";
 
   std::swap(*min, *max);
 
   // print out 
   std::cout << "the state of array after swapping min and maxn";
   std::copy(values, values + size, std::ostream_iterator<double>(std::cout, " "));
   std::cout << "nn";
 
   return 0;
}

#include <iostream>
 
long factorial(int n) {
   return n > 2 ? factorial(n - 1) * n : 1;
}
 
int main() {
   double result = static_cast<double>(3 * factorial(6)) / (factorial(3) + 4 * factorial(7)); 
   std::cout << result << "\n";
 
   return 0;
}

#include <iostream>
#include <iterator>
#include <algorithm>
 
int main() {
    // arrays' size
    const int size = 30;
    // source array
    int source[size];
 
    // declare generator
    auto generator_function = [] {
        return rand() % 10;
    };
 
    // fill array by random values in range [0, 10)
    std::generate_n(source, size, generator_function);
    
    // print out source array
    std::copy(source, source + size, std::ostream_iterator<int>(std::cout, " "));
    std::cout << "\n";
 
    // destiny array
    int destiny[size];
 
    // reverse source array to destiny
    std::reverse_copy(source, source + size, destiny);
    
    // print out destiny
    std::copy(destiny, destiny + size, std::ostream_iterator<int>(std::cout, " "));
    std::cout << "\n";
 
    return 0;
}