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#include <iostream>
#include <sstream>
#include <cstdlib>
#include <string>
using namespace std;
int rom_conv (string convert);
string int_conv (string numInteger);
int main()
{
int choice = 0;
cout << "|||||||||||WELCOME TO ROMAN NUMS CONVERTER|||||||||||||||\n"
<< " Please Choose one of the following from this menu\n"
<< " Press [1] if you wish to convert a ROMAN NUMERAL into an integer \n"
<< " Press [2] if you wish to convert an Integer into a ROMAN NUMERAL \n"
<< " Press [3] to quit" << endl;
cin >> choice;
if (choice == 3)
{
cout << "\nThe program will now close";
return 0;
}
else if (choice == 1)
{
string input;
int temp = 0;
cout << " Please enter a ROMAN numeral that you wish to convert into an integer\n"
<< " (please use lower cases)" << endl;
cin >> input;
temp = rom_conv (input);
cout << "The ROMAN numeral that you input, in integer form is equivalent to this integer number: \n"
<< temp << endl;
return 0;
}
else if (choice == 2)
{
string inputx;
cout << " Please enter an INTEGER that you wish to convert into a ROMAN numeral\n";
cin >> inputx;
cout << "The INTEGER # " << inputx << endl;
cout << " In ROMAN numerals is equivalent to: " << int_conv(inputx);
return 0;
}
system ("pause");
return 0;
}
//////////////////////// Roman #'s conversion /////////////////////
int rom_conv (string convert)
{
int final = 0;
const int SizeArray = 7;
char romannumerals [SizeArray] = {'I','V','X','L','C','D','M'};
int integernums [SizeArray] = {1,5,10,50,100,500,1000};
string input = convert;
for (int x= 0; x < input.length(); x++)
{
input[x] = toupper(convert[x]);
}
int* temp = new int [input.length()];
for (int x = 0; x <input.length(); x++)
{
for (int y = 0; y <SizeArray; y++)
{
if (input[x] == romannumerals[y])
{
temp[x] = integernums [y];
}
}
}
for (int x= 0;x< input.length () && (int)input.length() >1; x++)
{
int Currentvalue = temp[x], Newvalue = temp [x+1];
if (Currentvalue < Newvalue && x < input.length()-1)
{
temp[x] *= -1;
}
final += temp[x];
}
return final;
}
////////////////// INTEGER #'s Conversion ////////////////////
string int_conv (string numInteger)
{
int number = atoi (numInteger.c_str());
string inputx= "";
const int SizeArray = 13;
int integernumerals[SizeArray]={1000,900,500,400,100,90,50,40,10,9,5,4,1};
string romlist[SizeArray]={"M","CM","D","CD","C","XC","L","XL","X","IX","V","IV","I"};
int xnum= 0;
while (number > 0)
{
if (number < integernumerals[xnum])
{
++xnum;
}
else
{
inputx += romlist[xnum];
number -= integernumerals [xnum];
}
}
return inputx;
}
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