I"m having trouble with this code can any help? I am trying to find the average, mean, standard deviation

#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>
using namespace std;



void Fill_Array(int Size[], int& count);
void Print_Array(int Size[], int count);
double Calc_Average(int Size[], double average);
void Sort(int Size[], int numbers_used);
int Calc_Median(int median, const int Size[]);
int Calc_Standard_Deviation;
int Variance;
void Print_Array_and_Calculations(int median, double average, int standard_deviation,int Variance);


int main()
{
    int count;
    int Size [11],
    numbers_used = 0,
    median = 0;
    double average = 0;
    double standard_deviation;
    double variance;

    Fill_Array(Size, count);
    Print_Array(Size, count);
    average = Calc_Average(Size, average);
    Sort(Size, numbers_used);
    Calc_Median(median, Size);
    Print_Array_and_Calculations(median, average, standard_deviation, variance);

    return 0;
}

void Fill_Array(int Size[], int& count, int& number_used)
{
    ifstream in_size;
    string text_file;

    cout << "Enter the file to read in:";
    getline(cin, text_file);
    cout << endl << "The numbers in the array are:" << endl << endl;

    if(in_size.fail())
    {
        cerr  << "Error opening file";
        exit(1);
    }

          void Print_Array(int Size[], int count)

        number_used = 0;
        for(int index = 0; index < number_used; index++)
            cout << Size[index] << " ";
    }

          double Calc_Average(int Size[], double average)
{
        int total = 0;
        for (int i = 0; i < 11; i++)
        {
            total = total + Size[i];
        }
        average = double(total) / 11;
    {   
        return average;
    }

          void Sort(int Size[], int number_used)
    {

        for (int index = 0; index < number_used - 1; index++)
        {
            Variance= sum/(n-1);
            return variance;
        }
        int Calc_Median(int median, int Size[])
        {
            median = Size [ Size/ 11 ];
            return median;
        }
        int Cal_Standard_Deviation(int Cal_Standard_Deviation, int
        void Print_Array_and_Calculations(int median, double average,int standard deviation, int variance);
        {
            cout << "The average of the numbers is " << average;
            cout << "The median of the numbers is " << median;
            cout << "The standard deviation is " << deviation;
            cout << "The Variance is "<<sqrt(variance)<< endl;
        }

Edited 3 Years Ago by mike_2000_17: Fixed formatting

1. What is the problem?
2. Code tags code tags code tags.

It won't compile. I keep getting errors.

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