/*
 * File:   main.cpp
 * Author: James Rungsawang
 * Created on March 21st, 2019, 10:36 PM
 * Purpose:  Menu Template
 */

//System Libraries
#include <iostream>  //Input/Output Library
#include <cstdlib>
#include <ctime>
using namespace std;

//User Libraries

//Global Constants, no Global Variables are allowed
//Math/Physics/Conversions/Higher Dimensions - i.e. PI, e, etc...

//Function Prototypes

//Execution Begins Here!
int main(int argc, char** argv) {
    //Set the random number seed
    char choice,nProbs;

    //Declare Variables
    nProbs='3';

    do{
        //Present the menu to the user.
        cout<<"Choose from the following Menu"<<endl<<endl;
        cout<<"1 Roman Numeral Conversion"<<endl;
        cout<<"2 Problem 2"<<endl;
        cout<<"3 Problem 3"<<endl;
        cin>>choice;

        //Select the problem to execute
        switch(choice){
            case '1': {
            //Set the random number seed
               srand(static_cast<unsigned int>(time(0)));
               //Declare Variables
               int decimal;     //Decimal value between (1000-3000)
               string rnNum;    //Roman numeral representation

               //Initialize or input i.e. set variable values
               rnNum="";
               cout<<"Arabic to Roman numeral conversion."<<endl;
               cout<<"Input the integer to convert."<<endl;    //Prompts user to enter an integer
               cin>>decimal;                                   //Stores user input into variable


               //Map inputs -> outputs
               if(decimal<1000||decimal>3000){         //States if the input is between 1000 and 3000
                   cout<<decimal<<" is Out of Range!";
               }
               else{
                   //Determine number of 1000's
                   int n1000s=decimal/1000%10; //Converts to roman numerals for the 1000s
                   switch(n1000s){
                       case 3:rnNum+='M';
                       case 2:rnNum+='M';
                       case 1:rnNum+='M';
                   }

                   int n100s=decimal/100%10;       //Converts to roman numerals for the 100s place
                   switch(n100s){
                       case 9:rnNum+="CM";break;   //900 changes to CM
                       case 8:rnNum+="DCCC";break; //800 changes to DCCC
                       case 7:rnNum+="DCC";break;  //700 changes to DCC
                       case 6:rnNum+="DC";break;   //600 changes to DC
                       case 5:rnNum+="D";break;    //500 changes to D
                       case 4:rnNum+="CD";break;   //400 changes to CD
                       case 3:rnNum+="C";break;    //300 changes to C
                       case 2:rnNum+="C";break;    //200 changes to C
                       case 1:rnNum+="C";break;    //100 changes to C

                   }

                   int n10s=decimal/10%10;         //Converts to roman numerals for the 10s place
                   switch(n10s){
                       case 9:rnNum+="XC";break;   //90 changes to XC
                       case 8:rnNum+="LXXX";break; //80 changes to LXXXX
                       case 7:rnNum+="LXX";break;  //70 changes to LXX
                       case 6:rnNum+="LX";break;   //60 changes to LX
                       case 5:rnNum+="L";break;    //50 changes to L
                       case 4:rnNum+="XL";break;   //40 changes to XL
                       case 3:rnNum+="X";break;    //30 changes to X
                       case 2:rnNum+="X";break;    //20 changes to X
                       case 1:rnNum+="X";break;    //10 changes to X
                   }
                   int n1s=decimal/1%10;           //Converts to roman numerals for the 1s place
                   switch(n1s){
                       case 9:rnNum+="IX";break;   //9 changes to IX
                       case 8:rnNum+="VIII";break; //8 changes to VIII
                       case 7:rnNum+="VII";break;  //7 changes to VII
                       case 6:rnNum+="VI";break;   //6 changes to VI
                       case 5:rnNum+="V";break;    //5 changes to V
                       case 4:rnNum+="IV";break;   //4 changes to V
                       case 3:rnNum+="III";break;  //3 changes to III
                       case 2:rnNum+="II";break;   //2 changes to II
                       case 1:rnNum+="I";break;    //1 changes to I

                   }
                   cout<<decimal<<" is equal to "<<rnNum<<endl;  //Prints what roman numeral the decimal is equal to
                   break;
    }

             }
            case '2': {
                cout<<"Place problem 2 here"<<endl<<endl;
                break;
             }
            case '3': {
                cout<<"Place problem 3 here"<<endl<<endl;
                break;
             }
            default:
                cout<<"Exiting Menu"<<endl<<endl;
        }
    }while(choice<=nProbs);




    //Display the outputs

    //Exit stage right or left!
    return 0;
}