The Universe (Using classes, vectors, and iterations)

#include <iostream>
#include <string>
#include <vector>
#include <fstream>

using namespace std;

class Star{
public:
    Star(string sName, int sMass, double sTemp);

    string getName();

    int getMass();

    double getTemp();

    void setMass(int nMass);

    void setTemp(double nTemp);

private:
    string newName;
    int newMass;
    double newTemp;
};

Star::Star(string sName, int sMass, double sTemp){
    newName = sName;
    newMass = sMass;
    newTemp = sTemp;
}

string Star::getName(){
    return newName;
}

int Star::getMass(){
    return newMass;
}

double Star::getTemp(){
    return newTemp;
}

void Star::setMass(int nMass){
    newMass = nMass;
}

void Star::setTemp(double nTemp){
    newTemp = nTemp;
}


class Planet{
public:
    Planet(string pName, int pMass, char pWater, double pDist);

    string getName();

    int getMass();

    char getWater();

    double getDist();

    void setMass(int nMass);

    void setWater(char nWater);

    void setDist(double nDist);


private:
    string newName;
    int newMass;
    char newWater;
    double newDist;
};

Planet::Planet(string pName, int pMass, char pWater, double pDist){
    newName = pName;
    newMass = pMass;
    newWater = pWater;
    newDist = pDist;
}

string Planet::getName(){
    return newName;
}

int Planet::getMass(){
    return newMass;
}

char Planet::getWater(){
    return newWater;
}

double Planet::getDist(){
    return newDist;
}

void Planet::setMass(int nMass){
    newMass = nMass;
}

void Planet::setWater(char nWater){
    newWater = nWater;
}

void Planet::setDist(double nDist){
    newDist = nDist;
}


class Universe{
public:
    Universe();

    void addStar(Star);

    void addPlanet(Planet);

    Star getStar(int indexPos);

    Planet getPlanet(int posIndex);

    void showUniverse();

    void writeToFile(string fileName);

private:
    vector<Star> sVec;
    vector<Planet> pVec;
};

Universe::Universe(){

}

void Universe::addStar(Star aStar){
    sVec.push_back(aStar);
}

void Universe::addPlanet(Planet aPlanet){
    pVec.push_back(aPlanet);
}

Star Universe::getStar(int indexPos){
    vector<Star>::iterator iter = sVec.begin() + indexPos - 1;
    Star returnStar = *iter;

    return returnStar;
}

Planet Universe::getPlanet(int indexPos){
    vector<Planet>::iterator iter = pVec.begin() + indexPos - 1;
    Planet returnPlanet = *iter;

    return returnPlanet;
}

void Universe::showUniverse(){
    int starCount = 0;
    cout << "\nStars: \n";
    for(vector<Star>::iterator iter = sVec.begin(); iter != sVec.end(); ++iter){
        starCount++;
        cout << "Star #" << starCount << ": " << iter->getName() << ", Mass: " << iter->getMass() << ", Temperature: " << iter->getTemp() << "\n";
    }

    int planetCount = 0;
    cout << "\nPlanets: \n";
    for(vector<Planet>::iterator iter = pVec.begin(); iter != pVec.end(); ++iter){
        planetCount++;
        cout << "Planet #" << planetCount << ": " << iter->getName() << ", Mass: " << iter->getMass() << ", Has Water?: " << iter->getWater() << ", Distance: " << iter->getDist() << "\n";
    }
}

void Universe::writeToFile(string fileName){
    ofstream newFile(fileName);

    if(newFile.is_open()){
        int starCount = 0;
        for(vector<Star>::iterator iter = sVec.begin(); iter != sVec.end(); ++iter){
            starCount++;
            newFile << "Star #" << starCount << ": " << iter->getName() << ", Mass: " << iter->getMass() << ", Temperature: " << iter->getTemp() << "\n";
        }

        int planetCount = 0;
        for(vector<Planet>::iterator iter = pVec.begin(); iter != pVec.end(); ++iter){
            planetCount++;
            newFile << "Planet #" << planetCount << ": " << iter->getName() << ", Mass: " << iter->getMass() << ", Has Water?: " << iter->getWater() << ", Distance: " << iter->getDist() << "\n";
        }

        newFile.close();

    }
}


void askToWrite(Universe myUni);

int main(){

    cout << "-----------------------------------------------\n";
    cout << "Welcome to Universe Simulator: by Ben Bollinger\n";
    cout << "-----------------------------------------------\n\n";

    Universe myUni;
    int starNum;
    cout << "Enter Number of Stars: ";
    cin >> starNum;

    int planetNum;
    cout << "\nEnter Number of Planets: ";
    cin >> planetNum;
    cout << "\n";

    for(int i = 0; i < starNum; i++){
        string stName;
        cout << "Enter Star Name: ";
        cin >> stName;
        int stMass;
        cout << "Enter Star Mass: ";
        cin >> stMass;
        double stTemp;
        cout << "Enter Star Temperature: ";
        cin >> stTemp;

        Star newStar(stName, stMass, stTemp);
        myUni.addStar(newStar);

        cout << "\n";
    }

    for(int i = 0; i < planetNum; i++){
        string stName;
        cout << "Enter Planet Name: ";
        cin >> stName;
        int stMass;
        cout << "Enter Planet Mass: ";
        cin >> stMass;
        char plWater;
        cout << "Enter y/n If Planet has Water: ";
        cin >> plWater;
        double plDist;
        cout << "Enter Planet's Distance: ";
        cin >> plDist;

        Planet newPlanet(stName, stMass, plWater, plDist);
        myUni.addPlanet(newPlanet);

        cout << "\n";
    }

    myUni.showUniverse();

    string yesorno;
    cout << "\nChange a Planet or Star? (y/n): ";
    cin >> yesorno;

    if(yesorno == "y"){

        string plOrSt;
        cout << "Planet or Star? (p/s): ";
        cin >> plOrSt;

        if(plOrSt == "p"){

            int planet;
            cout << "\nWhich Planet? (Enter Planet Number): ";
            cin >> planet;

            Planet modPlanet = myUni.getPlanet(planet);

            string change;
            cout << "Change Mass, Water, or Distance? (m, w, d): ";
            cin >> change;

            if(change == "m"){

                int nMass;
                cout << "Change Mass From " << modPlanet.getMass() << " to what?: ";
                cin >> nMass;

                modPlanet.setMass(nMass);

                cout << "\n" << modPlanet.getName() << "'s new mass is " << modPlanet.getMass();

            }else if(change == "w"){

                char nWater;
                cout << "Change Water From " << modPlanet.getWater() << " to what?: ";
                cin >> nWater;

                modPlanet.setWater(nWater);

                cout << "\n" << modPlanet.getName() << "'s new water var is " << modPlanet.getWater();

            }else if(change == "d"){

                double nDist;
                cout << "Change Distance From " << modPlanet.getDist() << " to what?: ";
                cin >> nDist;

                modPlanet.setDist(nDist);

                cout << "\n" << modPlanet.getName() << "'s new distance is " << modPlanet.getDist();

            }else{
                cout << "\nEnded\n";
            }

        }else if(plOrSt == "s"){

            int star;
            cout << "\nWhich Star? (Enter Star Number): ";
            cin >> star;

            Star modStar = myUni.getStar(star);

            string change;
            cout << "Change Mass, or Temperature? (m/t): ";
            cin >> change;

            if(change == "m"){

                int nMass;
                cout << "Change Mass From " << modStar.getMass() << " to what?: ";
                cin >> nMass;

                modStar.setMass(nMass);

                cout << "\n" << modStar.getName() << "'s new mass is " << modStar.getMass();

            }else if(change == "t"){

                char nTemp;
                cout << "Change Water From " << modStar.getTemp() << " to what?: ";
                cin >> nTemp;

                modStar.setTemp(nTemp);

                cout << "\n" << modStar.getName() << "'s new temperature is " << modStar.getTemp();

            }else{
                askToWrite(myUni);
                cout << "\nEnded\n";
            }

        }else{
            askToWrite(myUni);
            cout << "\nEnded\n";
        }

    }else{
        askToWrite(myUni);
        cout << "\nEnded\n";
    }

    cout << "\n\n";
    system("pause");
}

void askToWrite(Universe myUni){
    string writeInfo;
    cout << "\n\nWrite Information To File? (y/n): ";
    cin >> writeInfo;

    if(writeInfo == "y"){

        string fileName;
        cout << "Name of file?: ";
        cin >> fileName;

    myUni.writeToFile(fileName);

    }else{
        cout << "\nEnded\n";
    }
}