// ----------------------------------------------
// SEN UE2.3
// ResistorColor.cpp
// xxxxxxxxxxxxxxx
// 5.11.2019
// ----------------------------------------------

#include <iostream>
#include <limits>

void ResistorColor(unsigned long long resistance);

int main()
{
    std::cout << "Geben sie einen Wiederstandswert zwischen 1 Ohm und 5 MOhm dessen Farbcode sie wissen moechten ein:";
    unsigned long long x;
    std::cin >> x;

    while (!std::cin) {     //iput valiadtion: if input does not match data type read input again
        std::cout << "Das war keine ganze Zahl! Bitte geben sie eine ganze Zahl ein: ";
        std::cin.clear();
        std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
        std::cin >> x;
    }

    ResistorColor(x);
}

void ResistorColor(unsigned long long resistance)
{
    unsigned long long tmp = resistance;
    char multiplier = 0;
    int Field[3];
    char pointer = 2;
    char digit = 0;

    while (tmp % 10 == 0) {
        multiplier++;
        tmp = tmp / 10;
    }
    Field[pointer] = multiplier;        //writes # of zeros to last space of array
    pointer--;

    for (char i = 1; i <= 2; i++) {     //writes digit 1, 2 to space pointer of array
        digit = tmp % 10;
        tmp = tmp / 10;
        Field[pointer] = digit;
        pointer--;
    }
    for (char a = 0; a <= 2; a++) {     //outputs color for each space of array
        switch (Field[a]) {
        case 0: std::cout << "schwarz ";
            break;
        case 1: std::cout << "braun ";
            break;
        case 2: std::cout << "rot ";
            break;
        case 3: std::cout << "orange ";
            break;
        case 4: std::cout << "gelb ";
            break;
        case 5: std::cout << "gruen ";
            break;
        case 6: std::cout << "blau ";
            break;
        case 7: std::cout << "violett ";
            break;
        case 8: std::cout << "grau ";
            break;
        case 9: std::cout << "weiss ";
            break;
        default: std::cout << "error - check input ";
            break;
        }
        if (a < 2) {        //add dashes between colors
            std::cout << "- ";
        }
    }
    std::cout << "ist der Farbcode fuer einen " << resistance << " Ohm Wiederstand.";
}

// ----------------------------------------------
// SEN UE2.2
// Primfaktorzerlegung.cpp
// xxxxxxxxxxxxxx
// 5.11.2019
// ----------------------------------------------

#include <iostream>
#include <limits>
using namespace std;

void PrimeFactorization(int number);

int main()
{
    cout << "Geben sie eine Zahl ein deren Primfaktoren sie kennen moechten: ";
    int x;
    cin >> x;

    while (!cin) {      //inout valiadtion: if input does not match data type read input again
        cout << "Das war keine ganze Zahl! Bitte geben sie eine ganze Zahl ein: ";
        cin.clear();
        cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
        cin >> x;
    }
    PrimeFactorization(x);
}


void PrimeFactorization(int number) {
    unsigned int factor = 2;
    cout << endl << "Eingabe: " << number;
    if (number == 0 || number == 1) {
        cout << endl << "Die Zahl " << number << " besitzt keine Primfaktoren.";
    }
    else {
        cout << endl << "Ausgabe: ";
        while (number != 1) {
            while (number % factor > 0) {
                factor++;
            }
            if (!(number == factor)) {
                cout << factor << ", ";     //if is not equal to number add ", " after output
            }
            else {
                cout << factor;
            }
            number = number / factor;
        }
    }
}