#include <iostream>

using namespace std;

const int size=100;
void getarray(double[], int&); //funtion prototype
void printarray(const double[], const int);
double sumarray (const double[],const int);
void getarray(double moon[],int&n)
{
    cout<<"enter data. when done, enter '0': "<<endl;
    for (n=0; n<size;n++)
    {
        cout<<n<<":";
        cin>>moon[n];
        if(moon[n]==0) break;
    }
}

void printarray(double moon[], int n)
{
    for (int i=0;i<n;i++)
    {
        cout<<i<<":"<<moon[i]<<endl;
    }
}

double sumarray (double moon[], int n)
{
    double sum=0;
    for (int x=0;x<n;x++)
    {
        sum+=moon[x];
    }
    return sum;
}



int main()
{
    double moon[size];
    int n,i,x;
    getarray(moon,n);
    printarray(moon,n);
    cout<<"sum = "<<sumarray(moon,n);

    return 0;
}