#include <iostream>
    #include <string>
    using namespace std;
    int main()
    {
        double Option1 = 12, Option2 = 6, Result;
        char Option;
        try 
        {   
            if (Option != '+' && Option != '-' && Option != '*' && Option != '/')
                throw Option;
            switch(Option)
            {
            case '+':
                Result = Option1 + Option2;
                break;
            case '-':
                Result = Option1 - Option2;
                break;
            case '*':
                Result = Option1 * Option2;
                break;
            case '/':
                Result = Option1 / Option2;
                break;
             }
             cout << "\n" << Option1 << " " << Option << " "<< Option2 << " = " << Result;
         }
         catch (const char ch)
         {
             cout << ch << "Is not a valid Option...";
         }
         return 0;
    }