Universal Char rendering

I was watching a Lynda's Tutorial and there was some C mixed with C++.

http://ift.tt/19HeOMP

In this picture the guy had a string with Hex in it and the compiler rendered it as Universal Char any how i decided to run a code that can print all of these universal characters. I did a dec to hex program then i attached this a string starts with U.

the question is ::: how can i make the program reads it like the guy in lynda did ??

#include <iostream>
#include <cmath>
using namespace std;

const int HexBase=16;
const int HexMax=15;
const int UniCharMaxPrint=100;
const int ASCCIAlphaCapBase=48;


int main() {

    int DecNum = 0;
    int sizeHex= 5;
    
    for (int j=0; j < UniCharMaxPrint; j++)//prints 100 unviersal Chars
    {
        int DecNumCopy = DecNum;
        int resultDiv =0;
        string HexChar=" ";
        string HexNum ="X";
        string UniNum ="U";
        
        for (int i = sizeHex; i >=0; i--)
        {
            //Dec calcultion
            resultDiv = (DecNumCopy/(int)(pow(HexBase,i)));
            DecNumCopy = DecNumCopy - ((int)(pow(HexBase,i)) * resultDiv);
            if ((i==0) && (resultDiv>HexMax)){cout <<"Error # is Too large"<<endl;}
            
            //Get the equivalente Hex charcter
            if ((resultDiv >= 0)&&(resultDiv <= 9))
            { HexChar = ASCCIAlphaCapBase + resultDiv;}
            else if ((resultDiv >= 10)&&(resultDiv <= 15))
            {   switch (resultDiv)
                {   case 10 : {HexChar='A'; break;};
                    case 11 : {HexChar='B'; break;};
                    case 12 : {HexChar='C'; break;};
                    case 13 : {HexChar='D'; break;};
                    case 14 : {HexChar='E'; break;};
                    case 15 : {HexChar='F'; break;};
                }
            }
            else {HexChar='*';};
            
            //Add to the result string
            HexNum.append(HexChar);
            UniNum.append(HexChar);
            
            
        }//endfor
        DecNum++;
        cout<< UniNum << endl;
    }
    return 0;
}