Base converter \w menu & steps (base-10 to base-x)

#include <iostream>
#include <cstring>

using namespace std;

float getDecimalPart(float number){
  int I = (int)number;
  number -= (float) I;
  return number;
}

void convertNumberToBase(float initialNumber, int base, bool trace)
{
    int i, pos(0), integerPart;
    char finalNumber[100];
    char baseRange[37] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    double dec(0);
    if(getDecimalPart(initialNumber)) {
        dec = getDecimalPart(initialNumber);
    }
    if(trace)
    {
        cout << "\n\nIn order to change a number's base from 10 to " << base << "\nwe need to compute repeated divisions of said number to the specified base.";
        cout << "\nAt the same time, we need to keep the remainder of every division in memory.\nAfter the numerator becomes 0 (there are no more divisions to be computed)";
        cout << "\nwe get the number in a different base by putting together every remainder\nin the opposite order of which they were computed.\n";
    }
    integerPart = (int)initialNumber;
    while(integerPart)
    {
        if(trace) {
            cout << "\nWe divide " << integerPart << " by " << base << ". Result: " << integerPart / base << ". Remainder: " << integerPart % base << " (" << baseRange[integerPart % base] << ')';
        }
        finalNumber[pos++] = baseRange[integerPart % base];
        integerPart = integerPart / base;
    }
    finalNumber[pos] = '\0';
    if(!dec) {
        if(trace) cout << "\nThe program stops. We now take the remainders from end to start.";
        cout << "\nThe converted number is: " << strrev(finalNumber);
    }
    else {
        if(trace)
        {
            cout << "\n\nIn order to change the base of the decimal part, we multiply it with the base.\n";
            cout << "If the result is greater than 0 we put the integer part aside and we continue\nmultiplying";
            cout << " until the decimal part is 0.\n";
            cout << "This time, we take the integer parts in the order that they were computed.\n\n";
            cout << "WARNING! If the decimal part is periodical/infinite, the program will only show\n";
            cout << "the first 10 digits.\n\n";
        }
        pos = 0;
        char decimalPoints[15];
        while(dec)
        {
            if(trace) cout << dec << " multiplied by " << base << " is " << dec * base << " (" << (int)(dec * base) << ")\n";
            dec *= base;
            if(dec > 0)
                decimalPoints[pos++] = baseRange[(int)dec];
            dec -= (int)dec;
            if(pos > 9) {
                    cout << "The result after the decimal point might not be exact.\n\n";
                    break;
            }

        }
        decimalPoints[pos] = '\0';
        cout << "\nThe converted number is: " << strrev(finalNumber) << '.' << decimalPoints;
    }
}

int main()
{
    int menuOption;
    float initNr;
    int base;
    bool trace = true;
    cout << "Welcome to the base converter program!\n";
    cout << "This program takes your base-10 input and converts it\n";
    cout << "to another base (2 - 37).\nDecimal points are supported.\n\n";
    do {
        cout << "\n\n1. Enter number\n";
        cout << "2. Display progress (default: yes) (current: ";
        trace?cout << "yes)":cout << "no)";
        cout << "\n3. Exit program\n";
        cout << "Chosen option: ";
        cin >> menuOption;
        switch(menuOption)
        {
            case 1:
                cout << "\nEnter number to convert: ";
                cin >> initNr;
                cout << "Enter desired base: ";
                cin >> base;
                if(base < 2 || base > 37) {
                    cout << "Out of bounds. Desired base must be within 2 and 37.";
                    break;
                }
                else if(base == 10)
                    cout << "The number is already in base 10.";
            //    else cout << "The converted number is: ";
                convertNumberToBase(initNr, base, trace);
                break;
            case 2:
                trace = !trace;
                if(!trace) cout << "Progress will no longer be displayed.";
                else cout << "Progress will now be displayed.";
                break;
            case 3:
                return 0;
                break;
            default: cout << "\nInvalid selection.";
        }
        }while(menuOption != 3);
        return 0;

}