S3 - zad.5

#include <iostream>
#include <iomanip>
#include <vector>
#include <cmath>
#include <stdexcept>

double Sqrt(double x)
{
    if(x<0) throw "Korijen iz negativnog broja!";
    return std:: sqrt(x);
}

double f(std::vector<double>v)
{
    double suma1(0), suma(0);
    for(int i=v.size()-1; i>=0; i--)
    {
        suma+=v[i];
        suma1+=Sqrt(suma);
        suma=suma1;
    }
    return suma1;
}

int main()
{
    int n, a;

    std:: cout << "Unesite broj elemenata niza! ";
    std:: cin >> n;
    std:: vector<double> v(n);
    std:: cout << "Unesite elemente niza: ";
    for(int i=0; i<n; i++)
      std:: cin>> v[i];

    try
    {
      std::cout<< "Suma je: "<< f(v);
    }
    catch(const char poruka[])
    {
        std:: cout<< poruka;
    }



  return 0;
}