C++ Programiranje - pomoc?

[Dark]

#include<iostream>
using namespace std;

int main(){
    double r1, r2, r3, r, i, u, u1, u2, u3;
    cin >> r1 >> r2 >> r3 >> u;
    r=r1+r2+r3;
    i=u/r;
    u1=i*r1;
    u2=i*r2;
    u3=i*r3;
    cout << "U=" << u << "V" << endl;
    cout << "R1=" << r1 << " ohma" << endl;
    cout << "R2=" << r2 << " ohma" << endl;
    cout << "R3=" << r3 << " ohma" << endl;
    cout << "R=" << r << " ohma" << endl;
    cout << "I=" << i << "A" << endl;
    cout << "U1=" << u1 << "V" << endl;
    cout << "U2=" << u2 << "V" << endl;
    cout << "U3=" << u3 << "V" << endl;
    return 0;}