cpp/number_to_roman.cpp at main · Robernetes/cpp · GitHub

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#include <iostream>

using namespace std;

int main(){
    int num, units, tens, hundreds;
    cout << "Enter a number: " << endl;
    cin >> num;

    while(true){

        units = num % 10; num /= 10;
        tens = num % 10; num /= 10;
        hundreds = num % 10; num /= 10;


        switch (hundreds) {
            case 1: cout << "C";
                break;
            case 2: cout << "CC";
                break;
            case 3: cout << "CCC";
                break;
            case 4: cout << "CD";
                break;
            case 5: cout << "D";
                break;
            case 6: cout << "DC";
                break;
            case 7: cout << "DCC";
                break;
            case 8: cout << "DCCC";
                break;
            case 9: cout << "CM";
        }

        switch (tens) {
            case 1: cout << "X";
                break;
            case 2: cout << "XX";
                break;
            case 3: cout << "XXX";
                break;
            case 4: cout << "XL";
                break;
            case 5: cout << "L";
                break;
            case 6: cout << "LX";
                break;
            case 7: cout << "LXX";
                break;
            case 8: cout << "LXXX";
                break;
            case 9: cout << "XC";
        }


        switch (units) {
            case 1: cout << "I";
                break;
            case 2: cout << "II";
                break;
            case 3: cout << "III";
                break;
            case 4: cout << "IV";
                break;
            case 5: cout << "V";
                break;
            case 6: cout << "VI";
                break;
            case 7: cout << "VII";
                break;
            case 8: cout << "VIII";
                break;
            case 9: cout << "IX";
        }

        cout << endl;
        cout << "Enter a number: " << endl;
        cin >> num;

    }


    system("pause");
    return 0;
}