#include <iostream>

int menu();
void DoTaskMany(int);

using namespace std;

int main()
{
    bool exit = false;
        for (;;)
        {
            int choice = menu();
            switch(choice)
            {
                case 1:
                    DoTaskMany(1);
                    break;
                case 2:
                    DoTaskMany(2);
                    break;
                case 3:
                    DoTaskMany(3);
                    break;
                case 4:
                    DoTaskMany(4);
                    break;
                case 5:
                    continue; // redundant!
                    break;
                case 6:
                    exit=true;
                    break;

                default:
                    cout << "Please select again! " << endl;
                    break;
            }                    // end switch

            if (exit == true)
            break;
    }                        // end forever
    return 0;
}                            // end main()

int menu()
{
        int choice;

        cout << " **** Menu **** " << endl << endl;
        cout << "(1) 100 o's " << endl;
        cout << "(2) 100 to 200 by twos. " << endl;
        cout << "(3) 200 to 300 by twos. " << endl;
        cout << "(4) 300 to 400 by twos. " << endl;
        cout << "(5) Redisplay menu. " << endl;
        cout << "(6) Quit. " << endl << endl;
        cout << ": ";
        cin >> choice;
        return choice;
}




void DoTaskMany(int which)
{
    switch (which)
    {
        case 1:
        {
            int i, j;
            for (i = 1; i<100; i+=2)
            {
                std::cout << i << " ";
            }
                std::cout << std::endl;
            break;
        }
    }

}