mp4 unfix

// CPS 171 MP4 Wonyoung Lee  : Roman calculator.
//

#include "stdafx.h"
#include <iostream>
#include <string>
#include <fstream>

using namespace std;


int convert_from_roman_to_decimal(char n)
{
    switch (n){
    case 'I':
        return 1;
        break;
    case 'V':
        return 5;
        break;
    case 'X':
        return 10;
        break;
    case 'L':
        return 50;
        break;
    case 'C':
        return 100;
        break;
    case 'D':
        return 500;
        break;
    case 'M':
        return 1000;
        break;
    default:
        break;
    }
}

string convert_from_decimal_to_roman(int num)
{
    string romanNum = " ";

    while (num > 0){
        if (num - 1000 >= 0){
            romanNum += "M";
            num -= 1000;
        }
        else if (num - 500 >= 0){
            romanNum += "D";
            num -= 500;
        }
        else if (num - 100 >= 0){
            romanNum += "C";
            num -= 100;
        }
        else if (num - 50 >= 0){
            romanNum += "L";
            num -= 50;
        }
        else if (num - 10 >= 0){
            romanNum += "X";
            num -= 10;
        }
        else if (num - 9 == 0){
            romanNum += "IX";
            num -= 9;
        }
        else if (num - 5 >= 0){
            romanNum += "V";
            num -= 5;
        }
        else if (num - 4 == 0){
            romanNum += "IV";
            num -= 4;
        }
        else if (num - 1 >= 0){
            romanNum += "I";
            num -= 1;
        }

    }

    return romanNum;
}


int main()
{
    string romanNum1 = " ";
    string romanNum2 = " ";
    string romanResult = " ";

    int transferNum1 = 0;
    int transferNum2 = 0;
    int transferResult = 0;

    char oper = ' ';


    ifstream inputfile;
    inputfile.open("c:\\temp\\mp4romanletrdata.txt");

    inputfile >> romanNum1 >> romanNum2 >> oper;




        for (int i = 0; i < romanNum1.length(); i++)        //first roman number convert to decimal.
        {
            transferNum1 += convert_from_roman_to_decimal(romanNum1[i]);    //use convert_from_roman_to_decimal function to change 1 roman number to decimal.
        }
        for (int i = 0; i < romanNum2.length(); i++)        //second roman number convert to decimal.
        {
            transferNum2 += convert_from_roman_to_decimal(romanNum2[i]);
        }


        transferResult = transferNum1 + transferNum2;
        cout << transferNum1 << " " << oper << " " << transferNum2 << " = " << transferResult;

        romanResult = convert_from_decimal_to_roman(transferResult);

        cout << romanResult << endl;


    system("pause");
    return 0;
}