array programming in c++

/* Fill up an array,print the array,count number of values,count the number of odd,count the number of even,sum  of odd ,sum of even,average,find largest value,find smallest */

#include<iostream>

using namespace std;

int fill_up(int array[],int size);

int main()

{

    int array[10],size;

    cout<<"Enter the size of an array:"<<endl;

    cin>>size;

    fill_up(array,size);

}

int fill_up(int array[],int size)

{

    int count=0,even=0,odd=0,even_sum=0,odd_sum=0,largest,smallest;

    float avg=0.0,avg_sum=0.0;

    cout<<"Enter the element:"<<endl;

    for(int i=0;i<size;i++)

    {

        cin>>array[i];

        if(array[i]%2==0)

        {

           even++;

           even_sum+=array[i];

        }

        else

        {

            odd++;

            odd_sum+=array[i];

        }

        count++;

        avg_sum+=array[i];

    }

    avg=avg_sum/size;

    largest=array[0];

    smallest=array[0];

    for(int i=0;i<size;i++)

    {

        if(array[i]<smallest)

        {

            smallest=array[i];

        }

    }

    for(int i=0;i<size;i++)

    {

        if(array[i]>largest)

        {

            largest=array[i];

        }

    }

    cout<<"The value of the array is:"<<endl;

    for(int i=0;i<size;i++)

    {

        cout<<array[i]<<"\t";

    }

    cout<<endl;

    cout<<"The number of value into the array:"<<count<<endl;

    cout<<"The number of even Value is:"<<even<<endl;

    cout<<"The number of Odd value is:"<<odd<<endl;

    cout<<"The sum of the even number is:"<<even_sum<<endl;

    cout<<"The sum of the Odd number is:"<<odd_sum<<endl;

    cout<<"The Avarage is:"<<avg<<endl;

    cout<<"The Largest value is:"<<largest<<endl;

    cout<<"The Lowest value is:"<<smallest<<endl;

    return 0;

}