P4GIP

#include <iostream>

using namespace std;

char w;
int a,i,e;
int g[10];

int main()
{
    cout << "Ihre Wahl? \na) Addition \t\ts) Subtraktion \nm) Multiplikation \td) Division \ne) Ende" <<endl;
    cin >> w;

    switch(w)
    {

        case 'a':           //Addition

            cout << "\nAddition!\n\n";
            cout << "Wieviele Zahlen? =>";

            cin >> a;
            cout << endl;

            for( i=1; i< (a+1); i++)
            {
                cout << "Zahl " << i <<" = ";
                cin >> g[i];
                e = e + g[i];
            }

            cout << "\nErgebnis der Addition von " << a <<" Zahlen : " << e << "\n\n";

        break;

        case 's' :      //Subtraktion

            cout << "\nSubtraktion!\n\n";
            cout << "Wieviele Zahlen? =>";

            cin >> a;
            cout << endl << "Zahl 1 = ";

            cin >> e;

            for( i=2; i < (a+1); i++)
            {
                cout << "Zahl " << i <<" = ";
                cin >> g[i];
                e = e - g[i];
            }

            cout << "\nErgebnis der Subtraktion von " << a <<" Zahlen : " << e << "\n\n";

        break;

        case'm' :   //Multiplikation

            cout << "\nMultiplikation!\n\n";
            cout << "Wieviele Zahlen? =>";

            cin >> a;
            cout << endl << "Zahl 1 = ";

            cin >> e;

            for( i=2; i < (a+1); i++)
            {
                cout << "Zahl " << i <<" = ";
                cin >> g[i];
                e = e * g[i];
            }

            cout << "\nErgebnis der Multiplikation von " << a <<" Zahlen : " << e << "\n\n";

        break;

        case 'd' :      // Divison

            cout << "\nDivision!\n\n";
            cout << "Wieviele Zahlen? =>";

            cin >> a;
            cout << endl << "Zahl 1 = ";

            cin >> e;

            for( i=2; i < (a+1); i++)
            {
                cout << "Zahl " << i <<" = ";
                cin >> g[i];
                e = e / g[i];
            }

            cout << "\nErgebnis der Division von " << a <<" Zahlen : " << e << "\n\n";

        break;
    }


    return 0;
}