(in C++) I have to use the void function in this code and call it in main to pri

Question

(in C++)

I have to use the void function in this code and call it in main to print the grades from int grades[] in descending order. this is what i have so far but i don't know what to do in the main function

#include<iostream>

using namespace std;

void sort(double x[], int n);
int main()
{
   int grades[] = { 100, 95, 87,92,79 };
  

   return 0;
}

void sort(double x[], int n)
{
   int m;
   double hold;
   for (int k = 0; k <= n - 2; ++k)
   {
       m = k;
       for (int j = k + 1; j <= n - 1; ++j)
           if (x[j] > x[m])
               m = j;
       hold = x[m];
       x[m] = x[k];
       x[k] = hold;
   }
   return;
}

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