This is a program that ask the user for a integer and convert it to roman numeral, it is written using the C++ programming language.
#include <iostream>
#include <string>
using namespace std;
string roman_to_int(int value){
struct romanStruct { int value; char const* numeral; };
static romanStruct const romandata[] =
{ 1000, "M",
900, "CM",
500, "D",
400, "CD",
100, "C",
90, "XC",
50, "L",
40, "XL",
10, "X",
9, "IX",
5, "V",
4, "IV",
1, "I",
0, NULL };
string result;
for (romanStruct const* current = romandata; current->value > 0; ++current){
while (value >= current->value){
result += current->numeral;
value -= current->value;
}
}
return result;
}
int main(){
int i=-1;
do{
cout << "Enter Integer [1-3999]: ";
cin >> i;
if(i==0){
cout << "Error";
}else{
cout << roman_to_int(i) << endl;
}
}while(i!=0);
}